Ács B, Szederkényi G and Csercsik D (2017), "A New Efficient Algorithm for Determining All Structurally Different Realizations of Kinetic Systems", MATCH Commun. Math. Comput. Chem.. Vol. 77(2), pp. 299-320.. |
BibTeX:
@article{Acs2017, author = {B. Ács and G. Szederkényi and D. Csercsik}, title = {A New Efficient Algorithm for Determining All Structurally Different Realizations of Kinetic Systems}, journal = {MATCH Commun. Math. Comput. Chem.}, year = {2017}, volume = {77}, number = {2}, pages = {299-320.}, doi = {http://match.pmf.kg.ac.rs/electronic_versions/Match77/n2/match77n2_299-320.pdf} } |
Alonso AA and Szederkényi G (2016), "Uniqueness of feasible equilibria for mass action law (MAL) kinetic systems", Journal of Process Control., dec, 2016. Vol. 48, pp. 41-71. Elsevier BV. |
BibTeX:
@article{Alonso2016, author = {A. A. Alonso and G. Szederkényi}, title = {Uniqueness of feasible equilibria for mass action law (MAL) kinetic systems}, journal = {Journal of Process Control}, publisher = {Elsevier BV}, year = {2016}, volume = {48}, pages = {41--71}, doi = {10.1016/j.jprocont.2016.10.002} } |
Lipták G, Rudan J, Hangos KM and Szederkényi G (2016), "Stabilizing Kinetic Feedback Design Using Semidefinite Programming", In 2nd IFAC Workshop on Thermodynamic Foundation of Mathematical Systems Theory - TFMST 2016, 28-30 September, 2016, Vigo, Spain. |
BibTeX:
@conference{Liptak2016a, author = {Gy. Lipták and J. Rudan and K. M. Hangos and G. Szederkényi}, title = {Stabilizing Kinetic Feedback Design Using Semidefinite Programming}, booktitle = {2nd IFAC Workshop on Thermodynamic Foundation of Mathematical Systems Theory - TFMST 2016, 28-30 September, 2016, Vigo, Spain}, year = {2016} } |
Polcz P, Szederkényi G and Hangos KM (2016), "Computational stability analysis of an uncertain bioreactor model", In 13th International Symposium on Stability, Vibration, and Control of Machines and Structures - SVCS 2016, June 16-18, Budapest, Hungary. , pp. 1-12. |
BibTeX:
@conference{Polcz2016, author = {P. Polcz and G. Szederkényi and K. M. Hangos}, title = {Computational stability analysis of an uncertain bioreactor model}, booktitle = {13th International Symposium on Stability, Vibration, and Control of Machines and Structures - SVCS 2016, June 16-18, Budapest, Hungary}, year = {2016}, pages = {1-12} } |
Szederkényi G, Ács B and Szlobodnyik G (2016), "Structural analysis of kinetic systems with uncertain parameters", In 2nd IFAC Workshop on Thermodynamic Foundation of Mathematical Systems Theory - TFMST 2016, 28-30 September, 2016, Vigo, Spain. , pp. 1-4. |
BibTeX:
@conference{Szederkenyi2016, author = {G. Szederkényi and B. Ács and G. Szlobodnyik}, title = {Structural analysis of kinetic systems with uncertain parameters}, booktitle = {2nd IFAC Workshop on Thermodynamic Foundation of Mathematical Systems Theory - TFMST 2016, 28-30 September, 2016, Vigo, Spain}, year = {2016}, pages = {1-4} } |
Tuza ZA, Ács B, Szederkényi G and Allgöwer F (2016), "Efficient computation of all distinct realization structures of kinetic systems", In 6th IFAC Conference on Foundations of Systems Biology in Engineering, 9-12 October, 2016, Magdeburg, Germany. , pp. 1-6. |
BibTeX:
@conference{Tuza2016, author = {Z. A. Tuza and B. Ács and G. Szederkényi and F. Allgöwer}, title = {Efficient computation of all distinct realization structures of kinetic systems}, booktitle = {6th IFAC Conference on Foundations of Systems Biology in Engineering, 9-12 October, 2016, Magdeburg, Germany}, year = {2016}, pages = {1-6} } |
Csercsik D and Szederkényi G (2014), "Parametric analysis of dynamically equivalent reaction network models", In 22nd Mediterranean Conference on Control and Automation, MED 2014, 06. 16. - 06. 19. 2015, Palermo, Italy. |
BibTeX:
@conference{Csercsik2014, author = {D. Csercsik and G. Szederkényi}, title = {Parametric analysis of dynamically equivalent reaction network models}, booktitle = {22nd Mediterranean Conference on Control and Automation, MED 2014, 06. 16. - 06. 19. 2015, Palermo, Italy}, year = {2014} } |
Ács B, Szederkényi G, Tuza Z and Tuza Z (2016), "Computing all possible graph structures describing linearly conjugate realizations of kinetic systems", Computer Physics Communications. Vol. 204, pp. 11-20. |
BibTeX:
@article{Acs2016, author = {B. Ács and G. Szederkényi and Zs. Tuza and Z.A. Tuza}, title = {Computing all possible graph structures describing linearly conjugate realizations of kinetic systems}, journal = {Computer Physics Communications}, year = {2016}, volume = {204}, pages = {11-20}, doi = {10.1016/j.cpc.2016.02.020} } |
Gábor A, Hangos KM and Szederkényi G (2016), "Linear conjugacy in biochemical reaction networks with rational reaction rates", Journal of Mathematical Chemistry. Vol. 54, pp. 1658-1676. |
BibTeX:
@article{Gabor2016, author = {A. Gábor and K. M. Hangos and G. Szederkényi}, title = {Linear conjugacy in biochemical reaction networks with rational reaction rates}, journal = {Journal of Mathematical Chemistry}, year = {2016}, volume = {54}, pages = {1658-1676}, doi = {10.1007/s10910-016-0642-7} } |
Lipták G, Szederkényi G and Hangos M (2016), "Kinetic feedback design for polynomial systems", Journal of Process Control. Vol. 41, pp. 56-66. |
BibTeX:
@article{Liptak2016, author = {Gy. Lipták and G. Szederkényi and M. Hangos}, title = {Kinetic feedback design for polynomial systems}, journal = {Journal of Process Control}, year = {2016}, volume = {41}, pages = {56-66}, doi = {10.1016/j.jprocont.2016.03.002} } |
Polcz P, Szederkényi G and Péni T (2015), "An improved method for estimating the domain of attraction of nonlinear systems containing rational functions", Journal of Physics - Conference Series. Vol. 659, pp. 012038 (1-12). |
BibTeX:
@article{Polcz2015, author = {P. Polcz and G. Szederkényi and T. Péni}, title = {An improved method for estimating the domain of attraction of nonlinear systems containing rational functions}, journal = {Journal of Physics - Conference Series}, year = {2015}, volume = {659}, pages = {012038 (1-12)}, doi = {10.1088/1742-6596/659/1/012038} } |
Ács B, Szederkényi G, Tuza ZA and Tuza Z (2015), "Computing Linearly Conjugate Weakly Reversible Kinetic Structures Using Optimization and Graph Theory", MATCH Commun. Math. Comput. Chem.. Vol. 74, pp. 489-512. |
BibTeX:
@article{Acs2015, author = {B. Ács and G. Szederkényi and Z. A. Tuza and Zs. Tuza}, title = {Computing Linearly Conjugate Weakly Reversible Kinetic Structures Using Optimization and Graph Theory}, journal = {MATCH Commun. Math. Comput. Chem.}, year = {2015}, volume = {74}, pages = {489-512}, url = {http://match.pmf.kg.ac.rs/electronic_versions/Match74/n3/match74n3_481-504.pdf} } |
Fodor A, Bálint R, Magyar A and Szederkényi G (2014), "Stability and Parameter Sensitivity Analysis of an Induction Motor", Hungarian Journal of Industry and Chemistry. Vol. 42, pp. 109-113. |
BibTeX:
@article{Fodor2014, author = {A. Fodor and R. Bálint and A. Magyar and G. Szederkényi}, title = {Stability and Parameter Sensitivity Analysis of an Induction Motor}, journal = {Hungarian Journal of Industry and Chemistry}, year = {2014}, volume = {42}, pages = {109-113} } |
Gábor A, Hangos KM, Banga JR and Szederkényi G (2015), "Reaction network realizations of rational biochemical systems and their structural properties", Journal of Mathematical Chemistry. Vol. 53, pp. 1657-1686. |
BibTeX:
@article{Gabor2015, author = {A. Gábor and K. M. Hangos and J. R. Banga and G. Szederkényi}, title = {Reaction network realizations of rational biochemical systems and their structural properties}, journal = {Journal of Mathematical Chemistry}, year = {2015}, volume = {53}, pages = {1657-1686}, doi = {10.1007/s10910-015-0511-9} } |
Hangos KM, Magyar A and Szederkényi G (2015), "Entropy-inspired Lyapunov Functions and Linear First Integrals for Positive Polynomial Systems", Mathematical Modelling of Natural Phenomena. Vol. 10, pp. 105-123. |
BibTeX:
@article{Hangos2015, author = {K. M. Hangos and Magyar, A. and G. Szederkényi}, title = {Entropy-inspired Lyapunov Functions and Linear First Integrals for Positive Polynomial Systems}, journal = {Mathematical Modelling of Natural Phenomena}, year = {2015}, volume = {10}, pages = {105-123}, doi = {10.1051/mmnp/201510309} } |
Lipták G, Szederkényi G and Hangos KM (2015), "Computing zero deficiency realizations of kinetic systems", Systems and Control Letters. Vol. 81, pp. 24-30. |
BibTeX:
@article{Liptak2015, author = {G. Lipták and G. Szederkényi and K. M. Hangos}, title = {Computing zero deficiency realizations of kinetic systems}, journal = {Systems and Control Letters}, year = {2015}, volume = {81}, pages = {24-30}, doi = {10.1016/j.sysconle.2015.05.001} } |
Lipták G, Szederkényi G and Hangos KM (2014), "On the parametric uncertainty of weakly reversible realizations of kinetic systems", Hungarian Journal of Industry and Chemistry. Vol. 42, pp. 103-107. |
BibTeX:
@article{Liptak2015a, author = {G. Lipták and G. Szederkényi and K. M. Hangos}, title = {On the parametric uncertainty of weakly reversible realizations of kinetic systems}, journal = {Hungarian Journal of Industry and Chemistry}, year = {2014}, volume = {42}, pages = {103-107} } |
Lipták G, Szederkényi G and Hangos KM (2015), "Hamiltonian Feedback Design for Mass Action Law Chemical Reaction Networks", In 5th IFAC Workshop on Lagrangian and Hamiltonian Methods for Nonlinear Control, 07. 04. - 07. 07. 2015, Lyon, France. , pp. 1-6. |
BibTeX:
@conference{Liptak2015b, author = {G. Lipták and G. Szederkényi and K. M. Hangos}, title = {Hamiltonian Feedback Design for Mass Action Law Chemical Reaction Networks}, booktitle = {5th IFAC Workshop on Lagrangian and Hamiltonian Methods for Nonlinear Control, 07. 04. - 07. 07. 2015, Lyon, France}, year = {2015}, pages = {1-6} } |
Tuza ZA and Szederkényi G (2015), "Computing Core Reactions of Uncertain Polynomial Kinetic Systems", In 23rd Mediterranean Conference on Control and Automation, MED 2015, 06. 16. - 06. 19. 2015, Torremolinos, Spain. , pp. 1187-1194. |
BibTeX:
@conference{Tuza2015, author = {Z. A. Tuza and G. Szederkényi}, title = {Computing Core Reactions of Uncertain Polynomial Kinetic Systems}, booktitle = {23rd Mediterranean Conference on Control and Automation, MED 2015, 06. 16. - 06. 19. 2015, Torremolinos, Spain}, year = {2015}, pages = {1187-1194} } |
Tuza ZA, Siegal-Gaskins D, Kim J and Szederkényi G (2015), "Analysis-based Parameter Estimation of an in vitro Transcription-Translation System", In 14th Annual European Control Conference, ECC 2015, 07.15. - 07. 17. 2015, Linz, Austria. , pp. 1554-1560. |
BibTeX:
@conference{Tuza2015a, author = {Z. A. Tuza and D. Siegal-Gaskins and J. Kim and G. Szederkényi}, title = {Analysis-based Parameter Estimation of an in vitro Transcription-Translation System}, booktitle = {14th Annual European Control Conference, ECC 2015, 07.15. - 07. 17. 2015, Linz, Austria}, year = {2015}, pages = {1554-1560} } |
Hangos KM and Szederkényi G (2014), "A model structure-driven hierarchical decentralized stabilizing control structure for process networks", Journal of Process Control. Vol. 24(9), pp. 1358-1370. |
Abstract: Based on the structure of process models a hierarchically structured state-space model has been proposed for process networks with controlled mass convection and constant physico-chemical properties. Using the theory of cascade-connected nonlinear systems and the properties of Metzler and Hurwitz matrices it is shown that process systems with controlled mass convection and without sources or with stabilizing linear source terms are globally asymptotically stable. The hierarchically structured model gives rise to a distributed controller structure that is in agreement with the traditional hierarchical process control system structure where local controllers are used for mass inventory control and coordinating controllers are used for optimizing the system dynamics. The proposed distributed controller is illustrated on a simple non-isotherm jacketed chemical reactor. |
BibTeX:
@article{Hangos2014, author = {K. M. Hangos and G. Szederkényi}, title = {A model structure-driven hierarchical decentralized stabilizing control structure for process networks}, journal = {Journal of Process Control}, year = {2014}, volume = {24}, number = {9}, pages = {1358-1370}, doi = {10.1016/j.jprocont.2014.06.003} } |
Hangos KM and Szederkényi G (2014), "Springer Proceedings in Mathematics and Statistics" Vol. 94, pp. 105-119. Spring. |
BibTeX:
@inbook{Hangos2014a, author = {K. M. Hangos and G. Szederkényi}, editor = {F. Hartung and M. Pituk}, title = {Springer Proceedings in Mathematics and Statistics}, publisher = {Spring}, year = {2014}, volume = {94}, pages = {105-119}, note = {ISBN: 978-331908250-9}, doi = {10.1007/978-3-319-08251-6_3} } |
Hangos KM and Szederkényi G (2014), "The effect of transformations on the structural dynamical properties of chemical reaction networks", In The 21st International Symposium on Mathematical Theory of Networks and Systems, MTNS 2014, 07. 07 - 07. 11, 2014, Groningen, The Netherlands. , pp. 894-899. |
BibTeX:
@conference{Hangos2014b, author = {K. M. Hangos and G. Szederkényi}, title = {The effect of transformations on the structural dynamical properties of chemical reaction networks}, booktitle = {The 21st International Symposium on Mathematical Theory of Networks and Systems, MTNS 2014, 07. 07 - 07. 11, 2014, Groningen, The Netherlands}, year = {2014}, pages = {894-899}, note = {ISBN:978-90-367-6321-9} } |
Lipták G, Szederkényi G and Hangos KM (2014), "Kinetic feedback computation for polynomial systems to achieve weak reversibility and minimal deficiency", In 13th European Control Conference, ECC 2014, 06. 24 - 06. 27, 2014, Strasbourg, France. , pp. 2691-2696. |
BibTeX:
@conference{Liptak2014, author = {G. Lipták and G. Szederkényi and K. M. Hangos}, title = {Kinetic feedback computation for polynomial systems to achieve weak reversibility and minimal deficiency}, booktitle = {13th European Control Conference, ECC 2014, 06. 24 - 06. 27, 2014, Strasbourg, France}, year = {2014}, pages = {2691-2696} } |
Rudan J, Szederkényi G, Hangos KM and Péni T (2014), "Polynomial time algorithms to determine weakly reversible realizations of chemical reaction networks", Journal of Mathematical Chemistry. Vol. 52(5), pp. 1386-1404. |
BibTeX:
@article{Rudan2014a, author = {J. Rudan and G. Szederkényi and K. M. Hangos and T. Péni}, title = {Polynomial time algorithms to determine weakly reversible realizations of chemical reaction networks}, journal = {Journal of Mathematical Chemistry}, year = {2014}, volume = {52}, number = {5}, pages = {1386-1404}, doi = {10.1007/s10910-014-0318-0} } |
Lakatos E, Meszéna D and Szederkényi G (2013), "Identifiablity Analysis and Improved Parameter Estimation of a Human Blood Glucose Control System Model", In 11th International Conference on Computational Methods in Systems Biology - CMSB 2013, Klosterneuburg, Austria, 22-24 September, 2013. A. Gupta and T.A. Henzinger (Eds.): CMSB 2013, Lecture Notes in Computer Science, LNBI 8130. , pp. 248-249. Springer.
[BibTeX] |
BibTeX:
@conference{Lakatos2013, author = {E. Lakatos and D. Meszéna and G. Szederkényi}, title = {Identifiablity Analysis and Improved Parameter Estimation of a Human Blood Glucose Control System Model}, booktitle = {11th International Conference on Computational Methods in Systems Biology - CMSB 2013, Klosterneuburg, Austria, 22-24 September, 2013. A. Gupta and T.A. Henzinger (Eds.): CMSB 2013, Lecture Notes in Computer Science, LNBI 8130}, publisher = {Springer}, year = {2013}, pages = {248-249}, note = {ISBN: 978-3-642-40707-9} } |
Gábor A, Hangos KM and Szederkényi G (2013), "On the Verification and Correction of Large-Scale Kinetic Models in Systems Biology" Vol. 8130, pp. 206-219. Springer. |
BibTeX:
@inbook{Gabor2013, author = {A. Gábor and K. M. Hangos and G. Szederkényi}, editor = {A. Gupta and T. A. Henzinger}, title = {On the Verification and Correction of Large-Scale Kinetic Models in Systems Biology}, publisher = {Springer}, year = {2013}, volume = {8130}, pages = {206-219}, note = {11th International Conference, CMSB 2013, Klosterneuburg, Austria, September 22-24, 2013. Proceedings, ISBN: 978-3-642-40707-9}, doi = {10.1007/978-3-642-40708-6_16} } |
Hangos KM, Szederkényi G and Alonso AA (2013), "Reaction kinetic form of lumped process system models", In IFAC Workshop on Thermodynamic Foundations of Mathematical Systems Theory, July 13-16, Lyon, France. , pp. 48-53. |
BibTeX:
@conference{Hangos2013b, author = {K. M. Hangos and G. Szederkényi and A. A. Alonso}, editor = {B. E. Ydstie and B. Maschke and D. Dochain}, title = {Reaction kinetic form of lumped process system models}, booktitle = {IFAC Workshop on Thermodynamic Foundations of Mathematical Systems Theory, July 13-16, Lyon, France}, year = {2013}, pages = {48-53}, note = {ISBN: 978-3-902823-40-3}, doi = {10.3182/20130714-3-FR-4040.00002} } |
Rudan J, Szederkényi G and Hangos KM (2013), "Computing dynamically equivalent realizations of biochemical reaction networks with mass conservation", In ICNAAM 2013: 11th International Conference of Numerical Analysis and Applied Mathematics, 21–27 September, Rhodes, Greece, AIP Conference Proceedings. Vol. 1558, pp. 2356-2359. |
BibTeX:
@conference{Rudan2013b, author = {J. Rudan and G. Szederkényi and K. M. Hangos}, title = {Computing dynamically equivalent realizations of biochemical reaction networks with mass conservation}, booktitle = {ICNAAM 2013: 11th International Conference of Numerical Analysis and Applied Mathematics, 21–27 September, Rhodes, Greece, AIP Conference Proceedings}, year = {2013}, volume = {1558}, pages = {2356-2359}, note = {ISBN: 978-0-7354-1184-5}, doi = {10.1063/1.4826014} } |
Rudan J, Szederkényi G and Hangos KM (2014), "Efficient Computation of Alternative Structures for Large Kinetic Systems Using Linear Programming", MATCH Commun. Math. Comput. Chem.. Vol. 71(1), pp. 71-92. |
BibTeX:
@article{Rudan2014, author = {J. Rudan and G. Szederkényi and K. M. Hangos}, title = {Efficient Computation of Alternative Structures for Large Kinetic Systems Using Linear Programming}, journal = {MATCH Commun. Math. Comput. Chem.}, year = {2014}, volume = {71}, number = {1}, pages = {71-92}, note = {ISSN: 0340-6253}, url = {http://match.pmf.kg.ac.rs/electronic_versions/Match71/n1/match71n1_71-92.pdf} } |
Csercsik D and Szederkényi G (2013), "Realization theory as a tool of stability analysis for kinetic systems", In Proc. of the IASTED International Conference Control and Applications (CA 2013), August 26-28, Honolulu, USA. , pp. 805.071. |
BibTeX:
@conference{Csercsik2013, author = {D. Csercsik and G. Szederkényi}, editor = {M. H. Hamza}, title = {Realization theory as a tool of stability analysis for kinetic systems}, booktitle = {Proc. of the IASTED International Conference Control and Applications (CA 2013), August 26-28, Honolulu, USA}, year = {2013}, pages = {805.071}, note = {ISBN (CD): 978-0-88986-958-5}, doi = {10.2316/P.2013.805-071} } |
Csercsik D and Szederkényi G (2013), "ATP production optimization in biochemical mass action models with protein turnover", In IFAC Workshop on Thermodynamic Foundations of Mathematical Systems Theory, July 13-16, Lyon, France. , pp. 42-47. |
BibTeX:
@conference{Csercsik2013a, author = {D. Csercsik and G. Szederkényi}, editor = {B. E. Ydstie and B. Maschke and D. Dochain}, title = {ATP production optimization in biochemical mass action models with protein turnover}, booktitle = {IFAC Workshop on Thermodynamic Foundations of Mathematical Systems Theory, July 13-16, Lyon, France}, year = {2013}, pages = {42-47}, note = {ISBN: 978-3-902823-40-3}, doi = {10.3182/20130714-3-FR-4040.00017} } |
Hangos K and Szederkényi G (2013), "The effect of conservation on the dynamics of chemical reaction networks", In IFAC Workshop on Thermodynamic Foundations of Mathematical Systems Theory, July 13-16, Lyon, France. , pp. 30-35. |
BibTeX:
@conference{Hangos2013a, author = {Hangos, K.M. and Szederkényi, G.}, editor = {B. E. Ydstie and B. Maschke and D. Dochain}, title = {The effect of conservation on the dynamics of chemical reaction networks}, booktitle = {IFAC Workshop on Thermodynamic Foundations of Mathematical Systems Theory, July 13-16, Lyon, France}, year = {2013}, pages = {30-35}, note = {ISBN: 978-3-902823-40-3}, doi = {10.3182/20130714-3-FR-4040.00008} } |
Szederkényi G (2013), "Computational Methods for the Analysis of Nonnegative Polynomial Systems", thesis for the title: Doctor of the Hungarian Academy of Sciences. |
BibTeX:
@misc{Szederkenyi2013, author = {Szederkényi, G.}, title = {Computational Methods for the Analysis of Nonnegative Polynomial Systems}, howpublished = {thesis for the title: Doctor of the Hungarian Academy of Sciences}, year = {2013} } |
Szederkényi G, Lipták G, Rudan J and Hangos K (2013), "Optimization-based design of kinetic feedbacks for nonnegative polynomial systems", In IEEE 9th International Conference of Computational Cybernetics, July 8-10, Tihany, Hungary. , pp. 67-72. |
BibTeX:
@conference{Szederkenyi2013a, author = {Szederkényi, G. and Lipták, G. and Rudan, J. and Hangos, K.M.}, title = {Optimization-based design of kinetic feedbacks for nonnegative polynomial systems}, booktitle = {IEEE 9th International Conference of Computational Cybernetics, July 8-10, Tihany, Hungary}, year = {2013}, pages = {67-72}, note = {ISBN: 978-1-4799-0063-3}, doi = {10.1109/ICCCyb.2013.6617563} } |
Veres J, Cserey G and Szederkényi G (2013), "Bio-inspired backlash reduction of a low-cost robotic joint using closed-loop-commutated stepper motors", Robotica. Vol. 31, pp. 789-796. |
BibTeX:
@article{Veres2013, author = {Veres, J. and Cserey, G. and Szederkényi, G.}, title = {Bio-inspired backlash reduction of a low-cost robotic joint using closed-loop-commutated stepper motors}, journal = {Robotica}, year = {2013}, volume = {31}, pages = {789-796}, note = {ISSN: 0263-5747}, doi = {10.1017/S0263574713000015} } |
Tuza ZA, Szederkényi G, Hangos KM, Alonso AA and Banga JR (2013), "Computing all sparse kinetic structures for a Lorenz system using optimization", International Journal of Bifurcation and Chaos. Vol. 23, pp. 1350141-1-1350141-17. |
Abstract: In this paper, all possible sparse chemical reaction network structures of a classical three-dimensional Lorenz system are computed assuming a given chemical complex set. The original nonkinetic equations are transformed into kinetic form using two different approaches: firstly, using a state-dependent time-rescaling and secondly, by applying the theory of X-factorable systems. Using the notions of core reactions and core complexes, an effective optimization-based computation approach is proposed for the calculation of all structurally different sparse reaction graphs. The resulting structures are briefly analyzed and compared from a structural point of view. |
BibTeX:
@article{Tuza2013, author = {Z. A. Tuza and G. Szederkényi and K. M. Hangos and A. A. Alonso and J. R. Banga}, title = {Computing all sparse kinetic structures for a Lorenz system using optimization}, journal = {International Journal of Bifurcation and Chaos}, year = {2013}, volume = {23}, pages = {1350141-1--1350141--17}, note = {ISSN: 0218-1274}, doi = {10.1142/S0218127413501411} } |
Hangos K, Gábor A and Szederkényi G (2013), "Model reduction in bio-chemical reaction networks with Michaelis-Menten kinetics", In European Control Conference (ECC 2013), July 17-19 2013, Zurich. , pp. 4478-4483. |
BibTeX:
@conference{Hangos2013, author = {Hangos, K.M. and Gábor, A. and Szederkényi, G.}, title = {Model reduction in bio-chemical reaction networks with Michaelis-Menten kinetics}, booktitle = {European Control Conference (ECC 2013), July 17-19 2013, Zurich}, year = {2013}, pages = {4478-4483} } |
Hannemann-Tamás R, Gábor A, Szederkényi G and K.M. H (2013), "Model complexity reduction of chemical reaction networks using mixed-integer quadratic computing", Computers and Mathematics with Applications. Vol. 65, pp. 1575-1595. |
BibTeX:
@article{Hannemann-Tamas2013, author = {Hannemann-Tamás, R. and Gábor, A. and Szederkényi, G. and Hangos K.M.}, title = {Model complexity reduction of chemical reaction networks using mixed-integer quadratic computing}, journal = {Computers and Mathematics with Applications}, year = {2013}, volume = {65}, pages = {1575-1595}, note = {ISSN: 0898-1221} } |
Magyar A, Hangos K and Szederkényi G (2013), "Stabilizing dynamic feedback design of quasi-polynomial systems using their underlying reduced linear dynamics", In 52nd IEEE Conference on Decision and Control (CDC 2013), Dec. 10-13, Florence, Italy. , pp. 636-641. |
BibTeX:
@conference{Magyar2013a, author = {Magyar, A. and Hangos, K.M. and Szederkényi, G.}, title = {Stabilizing dynamic feedback design of quasi-polynomial systems using their underlying reduced linear dynamics}, booktitle = {52nd IEEE Conference on Decision and Control (CDC 2013), Dec. 10-13, Florence, Italy}, year = {2013}, pages = {636-641}, doi = {10.1109/CDC.2013.6759953} } |
Szederkényi G, Banga JR and Alonso AA (2012), "CRNreals: a toolbox for distinguishability and identifiability analysis of biochemical reaction networks", Bioinformatics. Vol. 28, pp. 1549. |
BibTeX:
@article{Szederkenyi2012c, author = {G. Szederkényi and J. R. Banga and A. A. Alonso}, title = {CRNreals: a toolbox for distinguishability and identifiability analysis of biochemical reaction networks}, journal = {Bioinformatics}, year = {2012}, volume = {28}, pages = {1549}, doi = {10.1093/bioinformatics/bts171} } |
Alonso AA and Szederkényi G (2012), "On the Geometry of Equilibrium Solutions of Kinetic Systems Obeying the Mass Action Law", In 8th IFAC International Symposium on Advanced Control of Chemical Processes -- ADCHEM 2012, 10-13 July, Singapore. , pp. 469-474. |
Abstract: In this contribution the problem relating dynamic behavior and parameter values for weakly reversible chemical reaction networks (CRNs) that obey the mass action law is revisited. The approach is founded on previous methods and results discussed in [15-16] for weakly reversible CRNs. Two new research directions are however undertaken in this study, one of them exploits an alternative factorization of the Kernel of the Kirchhoff matrix which in a natural way links complex balance with zero deficiency. The other one intends to use the convex structure of the so-called family of solutions described in [15] on the space of reaction channels. |
BibTeX:
@conference{Alonso2012, author = {A. A. Alonso and G. Szederkényi}, title = {On the Geometry of Equilibrium Solutions of Kinetic Systems Obeying the Mass Action Law}, booktitle = {8th IFAC International Symposium on Advanced Control of Chemical Processes -- ADCHEM 2012, 10-13 July, Singapore}, year = {2012}, pages = {469-474}, doi = {10.3182/20120710-4-SG-2026.00089} } |
Johnston MD, Siegel D and Szederkényi G (2012), "Computing Linearly Conjugate Chemical Reaction Networks with Minimal Deficiency", In SIAM Conference on the Life Sciences -- SIAM LS 2012, 7-10 August, San Diego, USA. , pp. MS1-2-45.
[BibTeX] |
BibTeX:
@conference{Johnston2012b, author = {M. D. Johnston and D. Siegel and G. Szederkényi}, title = {Computing Linearly Conjugate Chemical Reaction Networks with Minimal Deficiency}, booktitle = {SIAM Conference on the Life Sciences -- SIAM LS 2012, 7-10 August, San Diego, USA}, year = {2012}, pages = {MS1-2-45} } |
Szederkényi G, Tuza Z and Péni T (2012), "New Results and Methods for Computing Dynamically Equivalent and Linearly Conjugate Reaction Network Structures", In SIAM Conference on the Life Sciences -- SIAM LS 2012, 7-10 August, San Diego, USA. , pp. MS1-3-45. |
BibTeX:
@conference{Szederkenyi2012b, author = {G. Szederkényi and Z. Tuza and T. Péni}, title = {New Results and Methods for Computing Dynamically Equivalent and Linearly Conjugate Reaction Network Structures}, booktitle = {SIAM Conference on the Life Sciences -- SIAM LS 2012, 7-10 August, San Diego, USA}, year = {2012}, pages = {MS1-3-45} } |
Hangos KM and G.Szederkényi (2012), "The underlying linear dynamics of some positive polynomial systems", Physics Letters A. Vol. 376, pp. 3129-3134. |
BibTeX:
@article{Hangos2012b, author = {K. M. Hangos and G.Szederkényi}, title = {The underlying linear dynamics of some positive polynomial systems}, journal = {Physics Letters A}, year = {2012}, volume = {376}, pages = {3129-3134}, doi = {10.1016/j.physleta.2012.10.004} } |
Hannemann-Tamás R, Gábor A, Szederkényi G and Hangos KM (2012), "Model complexity reduction of chemical reaction networks using mixed-integer quadratic programming", Computers & Mathematics with Applications. Vol. to appear, pp. available online. |
BibTeX:
@article{Hannemann-Tamas2012, author = {R. Hannemann-Tamás and A. Gábor and G. Szederkényi and K. M. Hangos}, title = {Model complexity reduction of chemical reaction networks using mixed-integer quadratic programming}, journal = {Computers & Mathematics with Applications}, year = {2012}, volume = {to appear}, pages = {available online}, doi = {10.1016/j.camwa.2012.11.024} } |
Johnston MD, Siegel D and Szederkényi G (2013), "Computing weakly reversible linearly conjugate chemical reaction networks with minimal deficiency", Mathematical Biosciences. Vol. 241, pp. 88-98. |
BibTeX:
@article{Johnston2013, author = {M. D. Johnston and D. Siegel and G. Szederkényi}, title = {Computing weakly reversible linearly conjugate chemical reaction networks with minimal deficiency}, journal = {Mathematical Biosciences}, year = {2013}, volume = {241}, pages = {88-98}, note = {ISSN: 0025-5564}, doi = {10.1016/j.mbs.2012.09.008} } |
Rudan J, Szederkényi G and Hangos KM (2012), "Effectively computing dynamically equivalent structures of large biochemical reaction networks", In International Conference on Bioinformatics and Computational Biology -- BIOCOMP BG 2012, 20-‐21 September, Varna, Bulgaria. , pp. 80.
[BibTeX] |
BibTeX:
@conference{Rudan2012, author = {J. Rudan and G. Szederkényi and K. M. Hangos}, title = {Effectively computing dynamically equivalent structures of large biochemical reaction networks}, booktitle = {International Conference on Bioinformatics and Computational Biology -- BIOCOMP BG 2012, 20-‐21 September, Varna, Bulgaria}, year = {2012}, pages = {80} } |
Szederkényi G, Tuza ZA and Hangos KM (2012), "Determining Biochemical Reaction Network Structures for Kinetic Polynomial Models with Uncertain Coefficients", AIP Conference Proceedings. Vol. 1479, pp. 2427-2430. |
BibTeX:
@article{Szederkenyi2012a, author = {G. Szederkényi and Z. A. Tuza and K. M. Hangos}, title = {Determining Biochemical Reaction Network Structures for Kinetic Polynomial Models with Uncertain Coefficients}, journal = {AIP Conference Proceedings}, year = {2012}, volume = {1479}, pages = {2427-2430}, doi = {10.1063/1.4756685} } |
Szederkényi G, Tuza Z and Hangos K (2012), "Dynamical equivalence and linear conjugacy of biochemical reaction network models", In 8th IFAC Symposium on Biological and Medical Systems, Budapest, Hungary, 29–31 August. , pp. 125-130. |
Abstract: The distinguishability and identifiability of biological network models are key properties influencing the reliability of structural and parametric identification of such models. Recently, several new results have been published about dynamically equivalent and linearly conjugate reaction networks. In this paper, the notion and importance of dynamical equivalence and linear conjugacy of biochemical network models obeying the mass action law is shown. For this, new concepts in the form of core complexes and core reactions for linearly conjugate networks are introduced. Two examples illustrate the developed computation methods. |
BibTeX:
@conference{Szederkenyi2012, author = {G. Szederkényi and Z.A. Tuza and K.M. Hangos}, title = {Dynamical equivalence and linear conjugacy of biochemical reaction network models}, booktitle = {8th IFAC Symposium on Biological and Medical Systems, Budapest, Hungary, 29–31 August}, year = {2012}, pages = {125-130}, doi = {10.3182/20120829-3-HU-2029.00042} } |
Otero-Muras I, Szederkényi G, Alonso AA and Hangos KM (2012), "Inducing sustained oscillations in mass action kinetic networks of a certain class", In Preprints of the 8th IFAC Symposium on Advanced Control of Chemical Processes, Singapore, July 10-12. Singapore, July 10-13, 2012. , pp. 475-480. The International Federation of Automatic Control (IFAC)The International Federation of Automatic Control. |
BibTeX:
@conference{Otero-Muras2012, author = {I. Otero-Muras and G. Szederkényi and A. A. Alonso and K. M. Hangos}, title = {Inducing sustained oscillations in mass action kinetic networks of a certain class}, booktitle = {Preprints of the 8th IFAC Symposium on Advanced Control of Chemical Processes, Singapore, July 10-12}, publisher = {The International Federation of Automatic Control (IFAC)The International Federation of Automatic Control}, year = {2012}, pages = {475-480} } |
Johnston MD, Siegel D and Szederkényi G (2012), "Dynamical equivalence and linear conjugacy of chemical reaction networks: new results and methods", MATCH Commun. Math. Comput. Chem.. Vol. 68, pp. 443-468. |
BibTeX:
@article{Johnston2012a, author = {M. D. Johnston and D. Siegel and G. Szederkényi}, title = {Dynamical equivalence and linear conjugacy of chemical reaction networks: new results and methods}, journal = {MATCH Commun. Math. Comput. Chem.}, year = {2012}, volume = {68}, pages = {443-468} } |
Csercsik D, Hangos KM and Szederkényi G (2012), "Identifiability analysis and parameter estimation of a single Hodgkin-Huxley type voltage dependent ion channel under voltage step measurement conditions", Neurocomputing. Vol. 77, pp. 178-188. |
Abstract: In this article the identifiability analysis of a single Hodgkin-Huxley (HH) type voltage dependent ion channel model under voltage clamp circumstances is performed. According to the results of the identifiability analysis, the two steady-state parameters ($m_, $h_) and the conductance ($g$) are not globally identifiable. Moreover, no pair from these three parameters is identifiable. Based on the results of the identifiability analysis, a novel optimization-based identification method is proposed and demonstrated on in silico data. The proposed method is based on the decomposition of the parameter estimation problem into two parts. The results of the article are used to formulate explicit criteria for the design of voltage clamp protocols. |
BibTeX:
@article{Csercsik2012, author = {D. Csercsik and K. M. Hangos and G. Szederkényi}, title = {Identifiability analysis and parameter estimation of a single Hodgkin-Huxley type voltage dependent ion channel under voltage step measurement conditions}, journal = {Neurocomputing}, year = {2012}, volume = {77}, pages = {178-188}, doi = {10.1016/j.neucom.2011.09.006} } |
Csercsik D, Szederkényi G and Hangos KM (2012), "Parametric uniqueness of deficiency zero reaction networks", Journal of Mathematical Chemistry. Vol. 50, pp. 1-8. |
Abstract: In this paper it is shown that deficiency zero mass action reaction networks containing one terminal linkage class are parametrically and therefore structurally unique with a fixed complex set. Clearly, weakly reversible deficiency zero networks with one linkage class belong to this class. However, it is shown through an illustrative example that deficiency zero networks with several linkage classes can have multiple dynamically equivalent realizations, even if the individual linkage classes are weakly reversible. |
BibTeX:
@article{Csercsik2012a, author = {D. Csercsik and G. Szederkényi and K. M. Hangos}, title = {Parametric uniqueness of deficiency zero reaction networks}, journal = {Journal of Mathematical Chemistry}, year = {2012}, volume = {50}, pages = {1-8}, doi = {10.1007/s10910-011-9902-8} } |
Johnston MD, Siegel D and Szederkényi G (2012), "A linear programming approach to weak reversibility and linear conjugacy of chemical reaction networks", Journal of Mathematical Chemistry. Vol. 50, pp. 274-288. |
Abstract: A numerically effective procedure for determining weakly reversible chemical reaction networks that are linearly conjugate to a known reaction network is proposed in this paper. The method is based on translating the structural and algebraic characteristics of weak reversibility to logical statements and solving the obtained set of linear (in)equalities in the framework of mixed integer linear programming. The unknowns in the problem are the reaction rate coefficients and the parameters of the linear conjugacy transformation. The efficacy of the approach is shown through numerical examples. |
BibTeX:
@article{Johnston2012, author = {M. D. Johnston and D. Siegel and G. Szederkényi}, title = {A linear programming approach to weak reversibility and linear conjugacy of chemical reaction networks}, journal = {Journal of Mathematical Chemistry}, year = {2012}, volume = {50}, pages = {274-288}, doi = {10.1007/s10910-011-9911-7} } |
Rudan J, Hangos KM and Szederkényi G (2011), "Analysis and supervisory control of a pressurizer using coloured Petri nets", In 9th European Workshop on Advanced Control and Diagnosis - ACD 2011. , pp. 1-6. |
BibTeX:
@conference{Rudan2011, author = {J. Rudan and K. M. Hangos and G. Szederkényi}, title = {Analysis and supervisory control of a pressurizer using coloured Petri nets}, booktitle = {9th European Workshop on Advanced Control and Diagnosis - ACD 2011}, year = {2011}, pages = {1-6}, url = {http://www.conferences.hu/acd2011/} } |
Szederkényi G, Banga JR and Alonso AA (2011), "Inference of complex biological networks: distinguishability issues and optimization-based solutions", BMC Systems Biology. Vol. 5, pp. 177. |
BibTeX:
@article{Szederkenyi2011c, author = {G. Szederkényi and J. R. Banga and A. A. Alonso}, title = {Inference of complex biological networks: distinguishability issues and optimization-based solutions}, journal = {BMC Systems Biology}, year = {2011}, volume = {5}, pages = {177}, doi = {10.1186/1752-0509-5-177} } |
Szederkényi G, Hangos KM and Tuza Z (2012), "Finding weakly reversible realizations of chemical reaction networks using optimization", MATCH Commun. Math. Comput. Chem.. Vol. 67, pp. 193-212. |
Abstract: An algorithm is given in this paper for the computation of dynamically equivalent weakly reversible realizations with the maximal number of reactions, for chemical reaction networks (CRNs) with mass action kinetics. The original problem statement can be traced back at least 30 years ago. The algorithm uses standard linear and mixed integer linear programming, and it is based on elementary graph theory and important former results on the dense realizations of CRNs. The proposed method is also capable of determining if no dynamically equivalent weakly reversible structure exists for a given reaction network with a previously fixed complex set. |
BibTeX:
@article{Szederkenyi2011b, author = {G. Szederkényi and K. M. Hangos and Zs. Tuza}, title = {Finding weakly reversible realizations of chemical reaction networks using optimization}, journal = {MATCH Commun. Math. Comput. Chem.}, year = {2012}, volume = {67}, pages = {193-212}, url = {http://arxiv.org/abs/1103.4741} } |
Tuza Z, Rudan J and Szederkényi G (2010), "Developing an integrated software environment for mobile robot navigation and control", In 2010 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2010; Zurich; 15 September 2010 through 17 September 2010. , pp. no. 5647506 (on CD). |
BibTeX:
@conference{Tuza2010, author = {Z. Tuza and J. Rudan and G. Szederkényi}, title = {Developing an integrated software environment for mobile robot navigation and control}, booktitle = {2010 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2010; Zurich; 15 September 2010 through 17 September 2010}, year = {2010}, pages = {no. 5647506 (on CD)}, note = {ISBN: 978-142445864-6}, doi = {10.1109/IPIN.2010.5647506} } |
Gáspár P, Szabó Z, Szederkényi G and Bokor J (2012), "Design of a two-level controller for an active suspension system", Asian Journal of Control. Vol. 14, pp. 664-678. |
Abstract: The paper focuses on a control design for a vehicle suspension system in which a balance between different performance demands is achieved. The starting point of the control design is a full–car model which contains nonlinear components, i.e. the dynamics of the dampers and springs and nonlinear actuator dynamics. In order to handle the high complexity of the problem this paper proposes the design of a two-level controller of an active suspension system. The required control force is computed by applying a high-level controller, which is designed using a linear parameter varying (LPV) method. For the control design the model is augmented with weighting functions specified by the performance demands and the uncertainty assumptions. The actuator generating the necessary control force is modelled as a nonlinear system for which a low-level force-tracking controller is designed. To obtain the low-level controller a backstepping method is proposed. As an alternative solution a feedback linearization method is also presented. The operation of the controller is illustrated through simulation examples. |
BibTeX:
@article{Gaspar2011, author = {P. Gáspár and Z. Szabó and G. Szederkényi and J. Bokor}, title = {Design of a two-level controller for an active suspension system}, journal = {Asian Journal of Control}, year = {2012}, volume = {14}, pages = {664-678}, doi = {10.1002/asjc.386} } |
Gábor A, Fazekas C, Szederkényi G and Hangos KM (2011), "Final comments by the authors for the article: Modeling and identification of a nuclear reactor with temperature effects and xenon poisoning", European Journal of Control. Vol. 17, pp. 119-122. |
BibTeX:
@article{Gabor2011a, author = {A. Gábor and C. Fazekas and G. Szederkényi and K. M. Hangos}, title = {Final comments by the authors for the article: Modeling and identification of a nuclear reactor with temperature effects and xenon poisoning}, journal = {European Journal of Control}, year = {2011}, volume = {17}, pages = {119-122} } |
Szederkényi G and Hangos KM (2011), "Finding complex balanced and detailed balanced realizations of chemical reaction networks", Journal of Mathematical Chemistry. Vol. 49, pp. 1163-1179. |
BibTeX:
@article{Szederkenyi2011a, author = {G. Szederkényi and K. M. Hangos}, title = {Finding complex balanced and detailed balanced realizations of chemical reaction networks}, journal = {Journal of Mathematical Chemistry}, year = {2011}, volume = {49}, pages = {1163-1179}, doi = {10.1007/s10910-011-9804-9} } |
Szederkényi G, Hangos K and Csercsik D (2010), "Computing Realizations of Reaction Kinetic Networks with Given Properties", In Coping with Complexity: Model Reduction and Data Analysis. Vol. 75, pp. 253-267. Springer. |
BibTeX:
@incollection{Szederkenyi2010, author = {Szederkényi, G. and Hangos, K.M. and Csercsik, D.}, editor = {A. N. Gorban and D. Roose}, title = {Computing Realizations of Reaction Kinetic Networks with Given Properties}, booktitle = {Coping with Complexity: Model Reduction and Data Analysis}, publisher = {Springer}, year = {2010}, volume = {75}, pages = {253-267}, url = {http://dx.doi.org/10.1007/978-3-642-14941-2}, doi = {10.1007/978-3-642-14941-2} } |
Csercsik D, Szederkényi G and Hangos KM (2010), "Modelling of Rapid and Slow Transmission Using the Theory of Reaction Kinetic Networks", ERCIM News. Vol. 82, pp. 22-23. |
BibTeX:
@article{Csercsik2010c, author = {Csercsik, D. and Szederkényi, G. and Hangos, K. M.}, title = {Modelling of Rapid and Slow Transmission Using the Theory of Reaction Kinetic Networks}, journal = {ERCIM News}, year = {2010}, volume = {82}, pages = {22--23} } |
Gábor A, Hangos KM and Szederkényi G (2010), "Modeling and Identification of the Pressurizer of a VVER Nuclear Reactor for Controller Design Purposes", In 11th International PhD Workshop on Systems and Control a Young Generation Viewpoint, September 1--3, 2010, Veszprém, Hungary. Vol. ISBN 978-615-5044-00-7, pp. 11-19. |
BibTeX:
@conference{Gabor2010, author = {Gábor, A. and Hangos, K. M. and Szederkényi, G.}, title = {Modeling and Identification of the Pressurizer of a VVER Nuclear Reactor for Controller Design Purposes}, booktitle = {11th International PhD Workshop on Systems and Control a Young Generation Viewpoint, September 1--3, 2010, Veszprém, Hungary}, year = {2010}, volume = {ISBN 978-615-5044-00-7}, pages = {11-19} } |
Szederkényi G, Hangos KM and Csercsik D (2009), "Coping with Complexity: Model Reduction and Data Analysis" , pp. ???. Springer. |
BibTeX:
@inbook{Szederkenyi2009d, author = {Szederkényi, G. and Hangos, K. M. and Csercsik, D.}, editor = {D. Roose and A. N. Gorban}, title = {Coping with Complexity: Model Reduction and Data Analysis}, publisher = {Springer}, year = {2009}, pages = {???} } |
Csercsik D, Farkas I, Szederkényi G, Hrabovszky E, Liposits Z and Hangos KM (2010), "Hodgkin–Huxley type modelling and parameter estimation of GnRH neurons", Biosystems. Vol. 100, pp. 198-207. |
Abstract: In this paper a simple one compartment Hodgkin–Huxley type electrophysiological model of GnRH neurons is presented, that is able to reasonably reproduce the most important qualitative features of the firing pattern, such as baseline potential, depolarization amplitudes, sub-baseline hyperpolarization phenomenon and average firing frequency in response to excitatory current. In addition, the same model provides an acceptable numerical fit of voltage clamp (VC) measurement results. The parameters of the model have been estimated using averaged VC traces, and characteristic values of measured current clamp traces originating from GnRH neurons in hypothalamic slices. The resulting parameter values show a good agreement with literature data in most of the cases. Applying parametric changes, which lead to the increase of baseline potential and enhance cell excitability, the model becomes capable of bursting. The effects of various parameters to burst length have been analyzed by simulation. |
BibTeX:
@article{Csercsik2010, author = {D. Csercsik and I. Farkas and G. Szederkényi and E. Hrabovszky and Z. Liposits and K. M. Hangos}, title = {Hodgkin–Huxley type modelling and parameter estimation of GnRH neurons}, journal = {Biosystems}, year = {2010}, volume = {100}, pages = {198-207}, doi = {10.1016/j.biosystems.2010.03.004} } |
Csercsik D, Szederkényi G and Hangos KM (2010), "Identifiability of a Hodgkin-Huxley type ion channel under voltage step measurement conditions", In 9th International Symposium on Dynamics and Control of Process Systems - DYCOPS 2010, Leuven, Belgium, July 5-7. (MoAT3.4), pp. 318-323. |
Abstract: In this paper, we analyze the identifiability properties of a Hodgkin-Huxley (HH) type voltage dependent ion channel model under voltage clamp circumstances. The elimination of the differential variables is performed, and the identifiability of various parameters is analyzed using the differential algebra approach and the algorithm based on the Taylor series expansion of the output. It is shown that the model is structurally non-identifiable using certain commonly applied parametrizations, and hidden dependences between physical parameters are unravelled. Using the results of the identifiability analysis, physically meaningful examples are shown when the model parameters are different but the system outputs are identical. |
BibTeX:
@conference{Csercsik2010a, author = {D. Csercsik and G. Szederkényi and K. M. Hangos}, editor = {M. Kothare and M. Tade and A. Vande Wouwer and I. Smets}, title = {Identifiability of a Hodgkin-Huxley type ion channel under voltage step measurement conditions}, booktitle = {9th International Symposium on Dynamics and Control of Process Systems - DYCOPS 2010, Leuven, Belgium, July 5-7}, year = {2010}, number = {MoAT3.4}, pages = {318-323} } |
Gábor A, Fazekas C, Szederkényi G and Hangos KM (2011), "Modeling and Identification of a Nuclear Reactor with Temperature Effects and Xenon Posioning", European Journal of Control. Vol. 17, pp. 104-115. |
Abstract: This paper presents the modeling and identification procedure for a VVER-type pressurized water reactor. The modeling goal is to produce a mathematical description in nonlinear state-space form that is suitable for control-oriented model analysis and preliminary controller design experiments. The proposed model takes temperature effects and Xenon poisoning into consideration and thus it is an extension of formerly published simpler model structures. Real transient measurement data from the plant has been used for the identification that is based on standard prediction error minimization. It is shown that the model is fairly well identifiable and the newly inserted model components significantly improve the quality of fit between the measured and computed model outputs. Furthermore, the estimated parameter values fall into physically meaningful ranges. |
BibTeX:
@article{Gabor2011, author = {A. Gábor and C. Fazekas and G. Szederkényi and K. M. Hangos}, title = {Modeling and Identification of a Nuclear Reactor with Temperature Effects and Xenon Posioning}, journal = {European Journal of Control}, year = {2011}, volume = {17}, pages = {104-115}, doi = {10.3166/ejc.17.104-115} } |
Hangos KM and Szederkényi G (2011), "Mass action realizations of reaction kinetic system models on various time scales", Journal of Physics: Conference Series (5th International Workshop on Multi-Rate Processes and Hysteresis (MURPHYS 2010))., In 5th International Workshop on MULTI-RATE PROCESSES & HYSTERESIS in Mathematics, Physics, Engineering and Information Sciences - MURPHYS 2010, Pécs, Hungary, 31 May - 3 June. Vol. 268, pp. 012009. |
BibTeX:
@article{Hangos2011, author = {K. M. Hangos and G. Szederkényi}, title = {Mass action realizations of reaction kinetic system models on various time scales}, booktitle = {5th International Workshop on MULTI-RATE PROCESSES & HYSTERESIS in Mathematics, Physics, Engineering and Information Sciences - MURPHYS 2010, Pécs, Hungary, 31 May - 3 June}, journal = {Journal of Physics: Conference Series (5th International Workshop on Multi-Rate Processes and Hysteresis (MURPHYS 2010))}, year = {2011}, volume = {268}, pages = {012009}, doi = {10.1088/1742-6596/268/1/012009} } |
Rudan J, Tuza Z and Szederkényi G (2010), "Using LMS-100 laser rangefinder for indoor metric map building", In IEEE International Symposium on Industrial Electronics - ISIE 2010, Bari, Italy, 4-7 July. (978-1-4244-6391-6/10), pp. 525-530. |
Abstract: The design and implementation of a scan matching based map building method is described in this paper. The brand new LMS-100 laser rangefinder was used and evaluated for point measurement and metric map building. The official driver of the rangefinder was migrated to Linux in order to be integrated into the applied software framework. The measurement results were compared to data obtained by the widely used LMS-200 device. Both sensors were mounted on a commercially available PowerBot differentially driven mobile robot. It is shown that for indoor robotic applications, the LMS-100 is similarly well-usable to the LMS-200 with significant advantages in compactness and power consumption. Furthermore, from a map-building point of view, the LMS-100 performs better in dense environments with obstacles having complex reflective surfaces. |
BibTeX:
@conference{Rudan2010, author = {J. Rudan and Z. Tuza and G. Szederkényi}, title = {Using LMS-100 laser rangefinder for indoor metric map building}, booktitle = {IEEE International Symposium on Industrial Electronics - ISIE 2010, Bari, Italy, 4-7 July}, year = {2010}, number = {978-1-4244-6391-6/10}, pages = {525-530} } |
Szabó Z, Szederkényi G, Gáspár P, Varga I, Hangos KM and Bokor J (2010), "Identification and dynamic inversion-based control of a pressurizer at the Paks NPP", Control Engineering Practice. Vol. 18, pp. 554-565. |
Abstract: The paper presents the design of a pressure controlling tank located in the primary circuit of a Nuclear Power Plant. All steps from modeling through control design to implementation are detailed. Based on first engineering principles a second-order Wiener model is formulated and its unknown parameters are identified. The control design is based on a dynamic inversion method. The performance of the designed closed-loop system is tuned by an error feedback. The implemented controller is of a distributed structure including measurement and control PLCs, a continuous power controller and a special supervisor module. The nominal stability of the controller in the networked environment is analyzed by using the maximum allowable transmit interval. The hardware and software design and implementation obey the safety-critical requirements imposed by the special nature of the plant. |
BibTeX:
@article{Szabo2010, author = {Z. Szabó and G. Szederkényi and P. Gáspár and I. Varga and K. M. Hangos and J. Bokor}, title = {Identification and dynamic inversion-based control of a pressurizer at the Paks NPP}, journal = {Control Engineering Practice}, year = {2010}, volume = {18}, pages = {554-565}, doi = {10.1016/j.conengprac.2010.02.009} } |
Szederkényi G (2010), "Computing reaction kinetic realizations of positive nonlinear systems using mixed integer programming", In 8th IFAC Symposium on Nonlinear Control Systems - NOLCOS 2010, Bologna, Italy, 1-3 September. , pp. ThP04.2. |
Abstract: The reaction kinetic realizations of nonnegative polynomial systems are studied in this paper. It is briefly reviewed that a wide class of positive systems can be written in or simply transformed to kinetic form. Based on the structure of kinetic realizations, valuable information can be obtained about the dynamical properties of the investigated systems using the results of chemical reaction network theory (CRNT). Since the realizations of a given system can have many different structures, mixed integer linear programming is used to generate the ones with required properties (i.e. the minimal/maximal number of reactions or complexes). |
BibTeX:
@conference{Szederkenyi2010a, author = {G. Szederkényi}, title = {Computing reaction kinetic realizations of positive nonlinear systems using mixed integer programming}, booktitle = {8th IFAC Symposium on Nonlinear Control Systems - NOLCOS 2010, Bologna, Italy, 1-3 September}, year = {2010}, pages = {ThP04.2} } |
Szederkényi G, Hangos KM and Péni T (2011), "Maximal and minimal realizations of reaction kinetic systems: computation and properties", MATCH Commun. Math. Comput. Chem.. Vol. 65, pp. 309-332. |
Abstract: This paper presents new results about the optimization based generation of chemical reaction networks (CRNs) of higher deficiency. Firstly, it is shown that the graph structure of the realization containing the maximal number of reactions is unique if the set of possible complexes is fixed. Secondly, a mixed integer programming based numerical procedure is given for computing a realization containing the minimal/maximal number of complexes. Moreover, the linear inequalities corresponding to full reversibility of the CRN realization are also described. The theoretical results are illustrated on meaningful examples. |
BibTeX:
@article{Szederkenyi2011, author = {G. Szederkényi and K. M. Hangos and T. Péni}, title = {Maximal and minimal realizations of reaction kinetic systems: computation and properties}, journal = {MATCH Commun. Math. Comput. Chem.}, year = {2011}, volume = {65}, pages = {309-332} } |
Hangos KM and Szederkényi G (2009), "Special Positive Systems: the QP and the Reaction Kinetic System Class", In Proceedings of the Workshop on Systems and Control Theory in honor of József Bokor on his 60th birthday. , pp. 121-139. BME AVVC, MTA-SZTAKI. |
BibTeX:
@conference{Hangos2009, author = {K. M. Hangos and G. Szederkényi}, editor = {K. M. Hangos and L. Nádai}, title = {Special Positive Systems: the QP and the Reaction Kinetic System Class}, booktitle = {Proceedings of the Workshop on Systems and Control Theory in honor of József Bokor on his 60th birthday}, publisher = {BME AVVC, MTA-SZTAKI}, year = {2009}, pages = {121-139}, note = {ISBN: 963-279-039-8} } |
Csercsik D, Szederkényi G, Hangos KM and Farkas I (2009), "Model synthesis and identification of a Hodgkin-Huxley-type GnRH neuron model", In Proceedings of the European Control Conference, Budapest, Hungary. , pp. 3058-3063. |
BibTeX:
@conference{Csercsik2009, author = {D. Csercsik and G. Szederkényi and K. M. Hangos and I. Farkas}, title = {Model synthesis and identification of a Hodgkin-Huxley-type GnRH neuron model}, booktitle = {Proceedings of the European Control Conference, Budapest, Hungary}, year = {2009}, pages = {3058-3063}, note = {ISBN: 978-963-311-369-1} } |
Gábor A, Fazekas C, Szederkényi G and Hangos KM (2009), "Modeling and Identification of a Nuclear Reactor with Temperature Effects and Xenon Poisoning", In Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal, November 3-5. , pp. 1647-1652. |
BibTeX:
@conference{Gabor2009, author = {A. Gábor and C. Fazekas and G. Szederkényi and K. M. Hangos}, title = {Modeling and Identification of a Nuclear Reactor with Temperature Effects and Xenon Poisoning}, booktitle = {Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal, November 3-5}, year = {2009}, pages = {1647-1652} } |
Péni T and Szederkényi G (2009), "Model predictive control for the hybrid primary circuit dynamics of a pressurized water nuclear power plant", Periodica Polytechnica Electrical Engineering. Vol. 53, pp. 37-44. |
BibTeX:
@article{Peni2009, author = {T. Péni and G. Szederkényi}, title = {Model predictive control for the hybrid primary circuit dynamics of a pressurized water nuclear power plant}, journal = {Periodica Polytechnica Electrical Engineering}, year = {2009}, volume = {53}, pages = {37-44}, url = {http://www.pp.bme.hu/ee/2009_1/ee2009_1_05.html}, doi = {10.3311/pp.ee.2009-1-2.05} } |
Rozgonyi S, Hangos KM and Szederkényi G (2010), "Determining the domain of attraction of hybrid non-linear systems using maximal Lyapunov functions", Kybernetika. Vol. 46, pp. 19-37. |
BibTeX:
@article{Rozgonyi2010, author = {Sz. Rozgonyi and K. M. Hangos and G. Szederkényi}, title = {Determining the domain of attraction of hybrid non-linear systems using maximal Lyapunov functions}, journal = {Kybernetika}, year = {2010}, volume = {46}, pages = {19-37} } |
Sándor AA, Soós BG, Cserey G and Szederkényi G (2009), "Ergonomic Remote Control Technique for Horizontal Rotors Equipped UAVs", In Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal, November 3-5. , pp. 2243-2248. |
BibTeX:
@conference{Sandor2009, author = {A. A. Sándor and B. G. Soós and G. Cserey and G. Szederkényi}, title = {Ergonomic Remote Control Technique for Horizontal Rotors Equipped UAVs}, booktitle = {Proceedings of the 35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009, Porto, Portugal, November 3-5}, year = {2009}, pages = {2243-2248} } |
Szederkényi G, Péni T, Gáspár P and Bokor J (2009), "Networked control approaches for a nuclear power plant pressurizer subsystem", In 1st IFAC Workshop on Estimation and Control of Networked Systems, Venice, Italy. , pp. FrGT1.4. |
BibTeX:
@conference{Szederkenyi2009c, author = {G. Szederkényi and T. Péni and P. Gáspár and J. Bokor}, title = {Networked control approaches for a nuclear power plant pressurizer subsystem}, booktitle = {1st IFAC Workshop on Estimation and Control of Networked Systems, Venice, Italy}, year = {2009}, pages = {FrGT1.4} } |
Szederkényi G (1998), "Model-based fault detection of heat exchangers". Thesis at: Department of Applied Computer Science, University of Veszprém.
[BibTeX] |
BibTeX:
@mastersthesis{Szederkenyi1998a, author = {G. Szederkényi}, title = {Model-based fault detection of heat exchangers}, school = {Department of Applied Computer Science, University of Veszprém}, year = {1998} } |
Csercsik D, Szederkényi G, Hangos KM and Farkas I (2009), "Dynamical Modeling and Identification of a GnRH neuron", In 7th IFAC Symposium on Modelling and Control in Biomedical Systems. Aalborg, Denmark, 12-14 August, 2009. , pp. 437-442. |
BibTeX:
@conference{Csercsik2009a, author = {D. Csercsik and G. Szederkényi and K. M. Hangos and I. Farkas}, title = {Dynamical Modeling and Identification of a GnRH neuron}, booktitle = {7th IFAC Symposium on Modelling and Control in Biomedical Systems}, year = {2009}, pages = {437-442} } |
Szederkényi G (2010), "Computing sparse and dense realizations of reaction kinetic systems", Journal of Mathematical Chemistry. Vol. 47, pp. 551-568. |
BibTeX:
@article{Szederkenyi2009b, author = {G. Szederkényi}, title = {Computing sparse and dense realizations of reaction kinetic systems}, journal = {Journal of Mathematical Chemistry}, year = {2010}, volume = {47}, pages = {551-568}, url = {http://www.springerlink.com}, doi = {10.1007/s10910-009-9525-5} } |
Szederkényi G (2009), "Identifiability study of a pressurizer in a pressurized water nuclear power plant", In European Control Conference - ECC'09. , pp. 3503-3508. |
BibTeX:
@conference{Szederkenyi2009a, author = {G. Szederkényi}, title = {Identifiability study of a pressurizer in a pressurized water nuclear power plant}, booktitle = {European Control Conference - ECC'09}, year = {2009}, pages = {3503-3508}, note = {ISBN: 978-963-311-369-1} } |
Fazekas C, Szederkényi G and Hangos KM (2007), "A simple dynamic model of the primary circuit in VVER plants for controller design purposes and its parameter estimation", In Proceedings of the 8th International PhD Workshop on Systems and Control. Balatonfüred, Hungary. , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Fazekas2007d, author = {Cs. Fazekas and G. Szederkényi and K. M. Hangos}, title = {A simple dynamic model of the primary circuit in VVER plants for controller design purposes and its parameter estimation}, booktitle = {Proceedings of the 8th International PhD Workshop on Systems and Control. Balatonfüred, Hungary}, year = {2007}, pages = {on CD} } |
Magyar A, Szederkényi G and Hangos KM (2007), "Control of mass action law based reaction networks", In Proceedings of the 16th International Conference on Process Control, Strbske Pleso, Slovakia. , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Magyar2007a, author = {A. Magyar and G. Szederkényi and K. M. Hangos}, title = {Control of mass action law based reaction networks}, booktitle = {Proceedings of the 16th International Conference on Process Control, Strbske Pleso, Slovakia}, year = {2007}, pages = {on CD} } |
Csercsik D and Szederkényi G (2006), "Cascade stabilization of a simple nonlinear limb model" |
BibTeX:
@techreport{Csercsik2006c, author = {D. Csercsik and G Szederkényi}, title = {Cascade stabilization of a simple nonlinear limb model}, year = {2006} } |
Lombai F and Szederkényi G (2009), "Throwing motion generation using nonlinear optimization on a 6-degree-of-freedom robot manipulator", In IEEE International Conference on Mechatronics, ICM 2009, 14-17 April. Malaga, Spain , pp. on CD. |
BibTeX:
@conference{Lombai2009, author = {F. Lombai and G. Szederkényi}, title = {Throwing motion generation using nonlinear optimization on a 6-degree-of-freedom robot manipulator}, booktitle = {IEEE International Conference on Mechatronics, ICM 2009, 14-17 April}, year = {2009}, pages = {on CD} } |
Szederkényi G (2009), "Comment on "identifiability of chemical reaction networks" by G. Craciun and C. Pantea", Journal of Mathematical Chemistry. Vol. 45, pp. 1172-1174. |
BibTeX:
@article{Szederkenyi2009, author = {G. Szederkényi}, title = {Comment on "identifiability of chemical reaction networks" by G. Craciun and C. Pantea}, journal = {Journal of Mathematical Chemistry}, year = {2009}, volume = {45}, pages = {1172-1174}, url = {http://www.springerlink.com}, doi = {10.1007/s10910-008-9499-8} } |
Hangos K, Szederkényi G and Otero-Muras I (2006), "Process control based on physical insight: passivity and Hamiltonian system models", In Proceedings of the Workshop on System Identification and Control Systems. (ISBN 963-421-586-6), pp. 129-146. Advanced Vehicles and Vehicle Control Knowledge Center of BME.
[BibTeX] |
BibTeX:
@incollection{Hangos2006, author = {K.M. Hangos and G. Szederkényi and I. Otero-Muras}, editor = {J. Bokor and K.M. Hangos}, title = {Process control based on physical insight: passivity and Hamiltonian system models}, booktitle = {Proceedings of the Workshop on System Identification and Control Systems}, publisher = {Advanced Vehicles and Vehicle Control Knowledge Center of BME}, year = {2006}, number = {ISBN 963-421-586-6}, pages = {129-146} } |
Csercsik D, Szederkényi G, Hangos K and Farkas I (2008), "Parameter Estimation of Hodgkin-Huxley model of GnRH neurons", In 9th International PhD Workshop on Systems and Control. Izola, Slovenia, Oct 1-3, 2008. |
BibTeX:
@conference{Csercsik2008b, author = {D. Csercsik and G. Szederkényi and K.M. Hangos and I. Farkas}, title = {Parameter Estimation of Hodgkin-Huxley model of GnRH neurons}, booktitle = {9th International PhD Workshop on Systems and Control}, year = {2008} } |
Pongrácz B, Szederkényi G and Hangos K (2003), "The effect of algebraic equations on the stability of process systems modelled by differential algebraic equations", Computer Aided Chemical Engineering. Vol. 14, pp. 857-862. |
Abstract: The effect of the algebraic constitutive equations on local stability of lumped process models is investigated in this paper using local linearization and eigenvalue checking. Case studies are used to systematically show the influence of algebraic equations on the open loop local stability of process systems using illustrative examples of a continuous fermentation process model and a countercurrent heat exchanger. |
BibTeX:
@article{Pongracz2003a, author = {B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {The effect of algebraic equations on the stability of process systems modelled by differential algebraic equations}, journal = {Computer Aided Chemical Engineering}, year = {2003}, volume = {14}, pages = {857-862}, doi = {10.1016/S1570-7946(03)80224-9} } |
Szederkényi G, Kristensen N, Hangos K and Jřrgensen S (2001), "Nonlinear analysis and control of a continuous fermentation process", Computer Aided Chemical Engineering. Vol. 9, pp. 787-792. |
BibTeX:
@article{Szederkenyi2001c, author = {G. Szederkényi and N.R. Kristensen and K.M. Hangos and S.B. Jřrgensen}, title = {Nonlinear analysis and control of a continuous fermentation process}, journal = {Computer Aided Chemical Engineering}, year = {2001}, volume = {9}, pages = {787-792}, doi = {10.1016/S1570-7946(01)80125-5} } |
Tuza Z, Szederkényi G and Hangos K (2002), "The effect of modelling assumptions on the differential index of lumped process models", Computer Aided Chemical Engineering. Vol. 10, pp. 979-984. |
Abstract: The effect of model simplification assumptions on the differential index of DAE process models is investigated in this paper. Efficient incremental graph-theoretical algorithms are proposed to follow the changes in the variable-equation assignments during the modelling process. Case studies are used to demonstrate the operation of the algorithms and the effect of steady-state assumptions on the differential index of a simple process model. |
BibTeX:
@article{Tuza2002a, author = {Zs. Tuza and G. Szederkényi and K.M. Hangos}, title = {The effect of modelling assumptions on the differential index of lumped process models}, journal = {Computer Aided Chemical Engineering}, year = {2002}, volume = {10}, pages = {979-984}, doi = {10.1016/S1570-7946(02)80191-2} } |
Szederkényi G (2007), "Design and implementation of the primary loop pressure controller in the Paks Nuclear Power Plant", In NSF Workshop on Real Time Control of Hybrid Systems, Budapest, Hungary, October 28-30.
[BibTeX] |
BibTeX:
@conference{Szederk'enyi2008, author = {G. Szederkényi}, title = {Design and implementation of the primary loop pressure controller in the Paks Nuclear Power Plant}, booktitle = {NSF Workshop on Real Time Control of Hybrid Systems, Budapest, Hungary, October 28-30}, year = {2007} } |
Fazekas C, Szederkényi G and Hangos K (2008), "Parameter estimation of a simple primary circuit model of a VVER plant", IEEE Transactions on Nuclear Science. Vol. 55(5), pp. 2643-2653. |
Abstract: A simple dynamic model in physical coordinates (an improved version of our model reported in teFazekasEtAl_NED:2007) and the corresponding parameter estimation procedure for the primary circuit dynamics of VVER-type pressurized water reactors is presented in this paper. The primary uses of the model are control oriented dynamic model analysis and high level controller design. The most important requirements of the simple physical model are that it should contain the possible minimal number of differential equations and it should be capable of describing important dynamic phenomena such as load change transients between day and night periods. Furthermore, the estimated parameter values should fall into physically meaningful ranges. The parameter estimation method is based on the decomposition of the overall system model into separably identifiable subsystems. The identification of the subsystems is followed by the fine-tuning of the model parameters with the parameter estimation of the entire system model. The constructed model satisfies the predefined requirements and its response shows good fit to the measurement data that were obtained from three units of the Paks Nuclear Power Plant in Hungary. |
BibTeX:
@article{Fazekas2008, author = {Cs. Fazekas and G. Szederkényi and K.M. Hangos}, title = {Parameter estimation of a simple primary circuit model of a VVER plant}, journal = {IEEE Transactions on Nuclear Science}, year = {2008}, volume = {55}, number = {5}, pages = {2643--2653}, doi = {10.1109/TNS.2008.2001924} } |
Csercsik D, Szederkényi G and Hangos K (2008), "Determining flat outputs of MIMO nolinear systems using directed graphs", In 8th Portuguese Conference on Automatic Control - CONTROLO'2008. , pp. 450-455. |
BibTeX:
@conference{Csercsik2008, author = {D. Csercsik and G. Szederkényi and K.M. Hangos}, title = {Determining flat outputs of MIMO nolinear systems using directed graphs}, booktitle = {8th Portuguese Conference on Automatic Control - CONTROLO'2008}, year = {2008}, pages = {450-455} } |
Fazekas C, Szederkényi G and Hangos K (2008), "Identification of the Primary Circuit Dynamics in a Pressurized Water Nuclear Power Plant", In 17th IFAC World Congress, Seoul, Korea. , pp. 10640-10645. |
BibTeX:
@conference{Fazekas2008a, author = {Cs. Fazekas and G. Szederkényi and K.M. Hangos}, title = {Identification of the Primary Circuit Dynamics in a Pressurized Water Nuclear Power Plant}, booktitle = {17th IFAC World Congress, Seoul, Korea}, year = {2008}, pages = {10640-10645}, note = {ISBN: 978-1-1234-7890-2} } |
Gáspár P, Szabó Z, Szederkényi G and Bokor J (2008), "Two-level controller design for an active suspension system", In 16th Mediterranean Conference on Control and Automation, MED'08, Ajaccio, Corsica, France. , pp. 439-444. |
BibTeX:
@conference{Gaspar2008a, author = {P. Gáspár and Z. Szabó and G. Szederkényi and J. Bokor}, title = {Two-level controller design for an active suspension system}, booktitle = {16th Mediterranean Conference on Control and Automation, MED'08, Ajaccio, Corsica, France}, year = {2008}, pages = {439-444}, note = {ISBN: 978-1-4244-2505-1} } |
Gáspár P, Szederkényi G, Szabó Z and Bokor J (2008), "The design of a two-level controller for suspension systems", In 17th IFAC World Congress, Seoul, Korea. , pp. 3386-3391. |
BibTeX:
@conference{Gaspar2008b, author = {P. Gáspár and G. Szederkényi and Z. Szabó and J. Bokor}, title = {The design of a two-level controller for suspension systems}, booktitle = {17th IFAC World Congress, Seoul, Korea}, year = {2008}, pages = {3386-3391}, note = {ISBN: 978-1-1234-7890-2} } |
Szederkényi G, Szabó Z, Bokor J and Hangos K (2008), "Analysis of the networked implementation of the primary circuit pressurizer controller at a nuclear power plant", In 16th Mediterranean Conference on Control and Automation, MED'08, Ajaccio, Corsica, France. , pp. 1604-1609. |
BibTeX:
@conference{Szederkenyi2008, author = {G. Szederkényi and Z. Szabó and J. Bokor and K.M. Hangos}, title = {Analysis of the networked implementation of the primary circuit pressurizer controller at a nuclear power plant}, booktitle = {16th Mediterranean Conference on Control and Automation, MED'08, Ajaccio, Corsica, France}, year = {2008}, pages = {1604-1609}, note = {ISBN: 978-1-4244-2505-1} } |
Varga I, Szederkényi G, Gáspár P and Bokor J (2008), "Implementation of Dynamic Inversion-Based Control of a Pressurizer at the Paks NPP", In 2008 IEEE Multi-conference on Systems and Control, San Antonio, Texas, USA. |
BibTeX:
@conference{Varga2008, author = {I. Varga and G. Szederkényi and P. Gáspár and J. Bokor}, title = {Implementation of Dynamic Inversion-Based Control of a Pressurizer at the Paks NPP}, booktitle = {2008 IEEE Multi-conference on Systems and Control, San Antonio, Texas, USA}, year = {2008} } |
Lombai F and Szederkényi G (2008), "Trajectory tracking control of a 6-degree-of-freedom robot arm using nonlinear optimization", In The 10th International Workshop on Advanced Motion Control, Trento, Italy., March, 2008. , pp. 655-660. |
BibTeX:
@conference{Lombai2008, author = {F. Lombai and G. Szederkényi}, title = {Trajectory tracking control of a 6-degree-of-freedom robot arm using nonlinear optimization}, booktitle = {The 10th International Workshop on Advanced Motion Control, Trento, Italy}, year = {2008}, pages = {655-660}, note = {ISBN: 978-1-4244-1703-2}, doi = {10.1109/AMC.2008.4516144} } |
Otero-Muras I, Szederkényi G, Alonso A and Hangos K (2008), "Local dissipative Hamiltonian description of reversible reaction networks", Systems and Control Letters. Vol. 57, pp. 554-560. |
Abstract: In this letter we show that closed reversible chemical reaction networks with independent elementary reactions admit a global pseudo-Hamiltonian structure which is at least locally dissipative around any equilibrium point. The structure matrix of the Hamiltonian description reflects the graph topology of the reaction network and it is a smooth function of the concentrations of the chemical species in the positive orthant. The physical interpretation of the description is briefly explained and two illustrative examples are presented for global and local dissipative Hamiltonian description, respectively. |
BibTeX:
@article{Otero-Muras2008a, author = {I. Otero-Muras and G. Szederkényi and A.A. Alonso and K.M. Hangos}, title = {Local dissipative Hamiltonian description of reversible reaction networks}, journal = {Systems and Control Letters}, year = {2008}, volume = {57}, pages = {554-560}, doi = {10.1016/j.sysconle.2007.12.003} } |
Pongrácz B, Ailer P, Hangos K and Szederkényi G (2008), "Nonlinear reference tracking control of a gas turbine with load torque estimation", International Journal of Adaptive Control and Signal Processing. Vol. 22, pp. 757-773. |
Abstract: Input-output linearization-based adaptive reference tracking control of a low-power gas turbine model is presented in this paper. The gas turbine is described by a third-order nonlinear input-affine state-space model, where the manipulable input is the fuel mass flowrate and the controlled output is the rotational speed. The stability of the one-dimensional zero dynamics of the controlled plant is investigated via phase diagrams. The input-output linearizing feedback is extended with a load torque estimator algorithm resulting in an adaptive feedback scheme. The tuning of controller parameters is performed considering three main design goals: appropriate settling time, robustness against environmental disturbances and model parameter uncertainties, and avoiding the saturation of the actuator. Simulations show that the closed-loop system is robust with respect to the variations in uncertain model and environ-mental parameters and its performance satisfies the defined requirements. |
BibTeX:
@article{Pongracz2008, author = {B. Pongrácz and P. Ailer and K.M. Hangos and G. Szederkényi}, title = {Nonlinear reference tracking control of a gas turbine with load torque estimation}, journal = {International Journal of Adaptive Control and Signal Processing}, year = {2008}, volume = {22}, pages = {757-773}, note = {impact factor: 0.58 (2006)}, doi = {10.1002/acs.1020} } |
Szederkényi G and Varga I (2007), "Design and implementation of the primary circuit pressure controller at the Paks Nuclear Power Plant", In Proc. of the 8th International PhD Workshop: Young Generation Viewpoint, Balatonfüred, Hungary., September, 2007.
[BibTeX] |
BibTeX:
@conference{Szederkenyi2007, author = {G. Szederkényi and I. Varga}, title = {Design and implementation of the primary circuit pressure controller at the Paks Nuclear Power Plant}, booktitle = {Proc. of the 8th International PhD Workshop: Young Generation Viewpoint, Balatonfüred, Hungary}, year = {2007} } |
Fazekas C, Csercsik D, Szederkényi G and Hangos K (2007), "Simulator for multi-scale musculoskeletal models with reflex circuits", In 6th EUROSIM Congress on Modelling and Simulation. Ljubljana, Slovenia, September, 2007. , pp. on CD. |
BibTeX:
@conference{Fazekas2007a, author = {Cs. Fazekas and D. Csercsik and G. Szederkényi and K.M. Hangos}, title = {Simulator for multi-scale musculoskeletal models with reflex circuits}, booktitle = {6th EUROSIM Congress on Modelling and Simulation}, year = {2007}, pages = {on CD}, note = {ISBN: 978-3-901608-32-2} } |
Magyar A, Szederkényi G and Hangos K (2008), "Globally stabilizing feedback control of process systems in generalized Lotka-Volterra form", Journal of Process Control. Vol. 18, pp. 80-91. |
Abstract: In the present paper a globally stabilizing feedback controller design method is proposed for process systems when the feedback structure is also assumed to be in a quasi-polynomial form. It is shown that such feedback structure can always be achieved for process systems. By exploiting the special structure of the controller design problem, the existent iterative linear matrix inequality (ILMI) algorithm of [Y.-Y. Cao, J. Lam, Y.-X. Sun, Static output feedback stabilization: an ILMI approach, Automatica 12 (1998) 16411645] is applied to solve the BMI feasibility problem underlying the design. In addition, some partial results on placing the globally stable equilibrium point with respect to the positive orthant have also been proposed that is only possible in a fully actuated situation when the input variables are the intensive variables at the inlet. Furthermore, some preliminary results in selecting the structure of the QP-type feedback have also been presented. |
BibTeX:
@article{Magyar2008, author = {A. Magyar and G. Szederkényi and K.M. Hangos}, title = {Globally stabilizing feedback control of process systems in generalized Lotka-Volterra form}, journal = {Journal of Process Control}, year = {2008}, volume = {18}, pages = {80-91}, doi = {10.1016/j.jprocont.2007.05.003} } |
Németh E, Fazekas C, Szederkényi G and Hangos K (2007), "Modeling and simulation of the primary circuit of the Paks nuclear power plant for control and diagnosis", In 6th EUROSIM Congress on Modelling and Simulation. Ljubljana, Slovenia, September, 2007. , pp. on CD. |
BibTeX:
@conference{Nemeth2007, author = {E. Németh and Cs. Fazekas and G. Szederkényi and K.M. Hangos}, title = {Modeling and simulation of the primary circuit of the Paks nuclear power plant for control and diagnosis}, booktitle = {6th EUROSIM Congress on Modelling and Simulation}, year = {2007}, pages = {on CD}, note = {ISBN: 978-3-901608-32-2} } |
Ailer P, Szederkényi G and Hangos K (2002), "LPV-modeling of a low-power gas turbine", In Proceedings of the Mini Conference of Vehicle System Dynamics, Identification and Anomalies. , pp. 511-519.
[BibTeX] |
BibTeX:
@conference{Ailer2002b, author = {P. Ailer and G. Szederkényi and K.M. Hangos}, title = {LPV-modeling of a low-power gas turbine}, booktitle = {Proceedings of the Mini Conference of Vehicle System Dynamics, Identification and Anomalies}, year = {2002}, pages = {511--519} } |
Otero-Muras I, Szederkényi G, Hangos K and Alonso A (2005), "Stabilization of chemical and biochemical networks", In 6th International PhD Workshop on Systems and Control. Izola, Slovenia , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Otero-Muras2005, author = {I. Otero-Muras and G. Szederkényi and K.M. Hangos and A.A. Alonso}, title = {Stabilization of chemical and biochemical networks}, booktitle = {6th International PhD Workshop on Systems and Control}, year = {2005}, pages = {on CD} } |
Pongrácz B, Szederkényi G and Hangos K (2002), "The effect of algebraic equations on the stability of process systems", In 3rd International PhD Workshop: Advances in Supervision and Control Systems. Strunjan, Slovenia , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Pongracz2002a, author = {B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {The effect of algebraic equations on the stability of process systems}, booktitle = {3rd International PhD Workshop: Advances in Supervision and Control Systems}, year = {2002}, pages = {on CD} } |
Pongrácz B, Szederkényi G and Hangos K (2003), "Stability Analysis Techniques for Process Models in DAE Form - the Effect of Algebraic Equations", In 4th International PhD Workshop: Information Technologies & Control. , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Pongracz2003, author = {B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {Stability Analysis Techniques for Process Models in DAE Form - the Effect of Algebraic Equations}, booktitle = {4th International PhD Workshop: Information Technologies & Control}, year = {2003}, pages = {on CD} } |
Pongrácz B, Ailer P, Szederkényi G and Hangos K (2004), "Nonlinear Zero Dynamics Analysis and Control of a Low Power Gas Turbine", In 5th International PhD Workshop on Systems and Control. Balatonfüred, Hungary , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Pongracz2004a, author = {B. Pongrácz and P. Ailer and G. Szederkényi and K.M. Hangos}, title = {Nonlinear Zero Dynamics Analysis and Control of a Low Power Gas Turbine}, booktitle = {5th International PhD Workshop on Systems and Control}, year = {2004}, pages = {on CD} } |
Pongrácz B, Szederkényi G and Hangos K (2005), "An algorithm to find first integrals in quasi-polynomial ODEs", In 6th International PhD Workshop on Systems and Control. Izola, Slovenia , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Pongracz2005b, author = {B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {An algorithm to find first integrals in quasi-polynomial ODEs}, booktitle = {6th International PhD Workshop on Systems and Control}, year = {2005}, pages = {on CD} } |
Szederkényi G, Kovács M and Hangos K (2001), "Reachability of nonlinear fed-batch fermentation processes", In The 2nd International PhD Student Workshop on Systems and Control: Young Generation's Viewpoint. Balatonfüred, Hungary , pp. 41-54.
[BibTeX] |
BibTeX:
@conference{Szederkenyi2001b, author = {G. Szederkényi and M. Kovács and K.M. Hangos}, title = {Reachability of nonlinear fed-batch fermentation processes}, booktitle = {The 2nd International PhD Student Workshop on Systems and Control: Young Generation's Viewpoint}, year = {2001}, pages = {41--54} } |
Csercsik D and Szederkényi G (2006), "Cascade control methods of a simple nonlinear limb model", In 7th International PhD Workshop. Hruba Skala, Czech Republic (ISBN: 80-903834-1-6), pp. on CD.
[BibTeX] |
BibTeX:
@conference{Csercsik2006a, author = {D. Csercsik and G. Szederkényi}, title = {Cascade control methods of a simple nonlinear limb model}, booktitle = {7th International PhD Workshop}, year = {2006}, number = {ISBN: 80-903834-1-6}, pages = {on CD} } |
Péni T, Szederkényi G and Bokor J (2006), "Model predictive control of the hybrid primary circuit dynamics in a pressurized water nuclear power plant" Budapest, Hungary (SCL-06-2006)
[BibTeX] |
BibTeX:
@techreport{Peni2006a, author = {T. Péni and G. Szederkényi and J. Bokor}, title = {Model predictive control of the hybrid primary circuit dynamics in a pressurized water nuclear power plant}, year = {2006}, number = {SCL-06-2006} } |
Szederkényi G, Magyar A and Hangos K (2006), "Quasi-polynomial and Lotka-Volterra representation in nonlinear systems and control theory", In Proceedings of the Workshop on System Identification and Control Systems. Budapest, Hungary (ISBN 963-421-586-6), pp. 147-163. Advanced Vehicles and Vehicle Control Knowledge Center of BME. |
BibTeX:
@conference{Szederkenyi2006, author = {G. Szederkényi and A. Magyar and K.M. Hangos}, editor = {J. Bokor and K.M. Hangos}, title = {Quasi-polynomial and Lotka-Volterra representation in nonlinear systems and control theory}, booktitle = {Proceedings of the Workshop on System Identification and Control Systems}, publisher = {Advanced Vehicles and Vehicle Control Knowledge Center of BME}, year = {2006}, number = {ISBN 963-421-586-6}, pages = {147--163} } |
Ailer P, Sánta I, Szederkényi G and Hangos KM (2001), "Nonlinear Model-Building of a Low-Power Gas Turbine", Periodica Polytechnica Ser. Transportation Engineering. Vol. 29, pp. 117-135.
[BibTeX] |
BibTeX:
@article{Ailer2001, author = {P. Ailer and I. Sánta and G. Szederkényi and K. M. Hangos}, title = {Nonlinear Model-Building of a Low-Power Gas Turbine}, journal = {Periodica Polytechnica Ser. Transportation Engineering}, year = {2001}, volume = {29}, pages = {117--135} } |
Ailer P, Szederkényi G and Hangos KM (2001), "Modeling and Nonlinear Analysis of a Low-Power Gas Turbine" Budapest, Hungary (SCL-01-2001)
[BibTeX] |
BibTeX:
@techreport{Ailer2001a, author = {P. Ailer and G. Szederkényi and K. M. Hangos}, title = {Modeling and Nonlinear Analysis of a Low-Power Gas Turbine}, year = {2001}, number = {SCL-01-2001} } |
Ailer P, Szederkényi G and Hangos KM (2002), "Model-Based Nonlinear Control of a Low-Power Gas Turbine", In Proceedings of the "15th IFAC World Congress on Automatic Control". Barcelona, Spain Elsevier Science.
[BibTeX] |
BibTeX:
@conference{Ailer2002, author = {P. Ailer and G. Szederkényi and K. M. Hangos}, editor = {E. F. Camacho and L. Basanez and J.A. de la Puente}, title = {Model-Based Nonlinear Control of a Low-Power Gas Turbine}, booktitle = {Proceedings of the "15th IFAC World Congress on Automatic Control"}, publisher = {Elsevier Science}, year = {2002} } |
Ailer P, Szederkényi G and Hangos KM (2002), "Parameter-estimation and Model Validation of a Low-Power Gas Turbine", In IASTED International Conference on Modeling, Identification and Control -- MIC'2002. Innsbruck, Austria , pp. 604-609. ACTA Press.
[BibTeX] |
BibTeX:
@conference{Ailer2002a, author = {P. Ailer and G. Szederkényi and K. M. Hangos}, editor = {M. H. Hamza}, title = {Parameter-estimation and Model Validation of a Low-Power Gas Turbine}, booktitle = {IASTED International Conference on Modeling, Identification and Control -- MIC'2002}, publisher = {ACTA Press}, year = {2002}, pages = {604--609} } |
Ailer P, Szederkényi G and Hangos KM (2003), "Nonlinear Control of a Low-Power Gas Turbine Based on Input-Output Linearization", In Proceedings of the $4^th$ International Workshop "Information Technologies and Control". Spa Libverda, Czech Republic , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Ailer2003.emphInCD, author = {P. Ailer and G. Szederkényi and K. M. Hangos}, title = {Nonlinear Control of a Low-Power Gas Turbine Based on Input-Output Linearization}, booktitle = {Proceedings of the $4^th$ International Workshop "Information Technologies and Control"}, year = {2003}, pages = {on CD} } |
Ailer P, Pongrácz B and Szederkényi G (2005), "Constrained control of a low power industrial gas turbine based on input-output linearization", In International Conference on Control and Automation, ICCA 2005. Budapest, Hungary, June, 2005. , pp. 368-373.
[BibTeX] |
BibTeX:
@conference{Ailer2005, author = {P. Ailer and B. Pongrácz and G. Szederkényi}, title = {Constrained control of a low power industrial gas turbine based on input-output linearization}, booktitle = {International Conference on Control and Automation, ICCA 2005}, year = {2005}, pages = {368--373} } |
Csercsik D, Szederkényi G and Hangos K (2007), "Cascade stabilization and reference tracking of a simple nonlinear limb model", In 26th IASTED International Conference on Modeling, Identification, and Control - MIC 2007. Innsbruck, Austria , pp. 369-374. Acta Press.
[BibTeX] |
BibTeX:
@conference{Csercsik2007a, author = {D. Csercsik and G. Szederkényi and K.M. Hangos}, title = {Cascade stabilization and reference tracking of a simple nonlinear limb model}, booktitle = {26th IASTED International Conference on Modeling, Identification, and Control - MIC 2007}, publisher = {Acta Press}, year = {2007}, pages = {369--374}, note = {ISBN 978-0-88896-633-1 / 978-0-88986-635-5.} } |
Eged K, Kis Z, Szederkényi G and Kanyár B (1998), "Planning nuclear countermeasures in the way of optimization of cost", In 23rd Workshop on Radiation Protection, Balatonkenese, Hungary.
[BibTeX] |
BibTeX:
@conference{Eged1998, author = {K. Eged and Z. Kis and G. Szederkényi and B. Kanyár}, title = {Planning nuclear countermeasures in the way of optimization of cost}, booktitle = {23rd Workshop on Radiation Protection, Balatonkenese, Hungary}, year = {1998} } |
Eged K, Kis Z, Kanyár B and Szederkényi G (2000), "A critical review of experimental, field and modeling information on the transfer of radionuclides to fruits; description of the RUVFRU model (I)"
[BibTeX] |
BibTeX:
@techreport{Eged2000, author = {K. Eged and Z. Kis and B. Kanyár and G. Szederkényi}, title = {A critical review of experimental, field and modeling information on the transfer of radionuclides to fruits; description of the RUVFRU model (I)}, year = {2000} } |
Eged K, Kis Z, Kanyár B and Szederkényi G (2000), "A critical review of experimental, field and modeling information on the transfer of radionuclides to fruits; description of the RUVFRU model (II)"
[BibTeX] |
BibTeX:
@techreport{Eged2000a, author = {K. Eged and Z. Kis and B. Kanyár and G. Szederkényi}, title = {A critical review of experimental, field and modeling information on the transfer of radionuclides to fruits; description of the RUVFRU model (II)}, year = {2000} } |
Fazekas C, Szederkényi G and Hangos K (2007), "A simple dynamic model of the primary circuit in VVER plants for controller design purposes", Nuclear Engineering and Design. Vol. 237, pp. 1071-1087. |
Abstract: A simple low dimensional nonlinear dynamic model of the primary circuit in a VVER-type nuclear power plant is developed from first engineering principles that is able to capture the most important dynamics of the system in normal operating modes. The model includes the description of the main control loops in the system, too. The model has been verified and validated by using measured data from three VVER-440 units of Paks Nuclear Power Plant in Hungary, and a good fit has been obtained. This qualifies the model to be the basis for the integrated re-design of the primary control loops. |
BibTeX:
@article{Fazekas2006, author = {Cs. Fazekas and G. Szederkényi and K.M. Hangos}, title = {A simple dynamic model of the primary circuit in VVER plants for controller design purposes}, journal = {Nuclear Engineering and Design}, year = {2007}, volume = {237}, pages = {1071--1087}, doi = {10.1016/j.nucengdes.2006.12.002} } |
Fazekas C, Szederkényi G and Hangos K (2006), "Linear and nonlinear control of musculoskeletal systems", In 25th IASTED International Conference, Modeling, Identification, and Control - MIC 2006. Lanzarote, Spain, February, 2006. , pp. 219-224. |
BibTeX:
@conference{Fazekas2006a, author = {Cs. Fazekas and G. Szederkényi and K.M. Hangos}, title = {Linear and nonlinear control of musculoskeletal systems}, booktitle = {25th IASTED International Conference, Modeling, Identification, and Control - MIC 2006}, year = {2006}, pages = {219--224} } |
Fazekas C, Szederkényi G and Hangos K (2007), "Model identification of the primary circuit at the Paks Nuclear Power Plant", In 26th IASTED International Conference on Modeling, Identification, and Control - MIC 2007. Innsbruck, Austria , pp. 464-469. Acta Press. |
BibTeX:
@conference{Fazekas2007, author = {Cs. Fazekas and G. Szederkényi and K.M. Hangos}, title = {Model identification of the primary circuit at the Paks Nuclear Power Plant}, booktitle = {26th IASTED International Conference on Modeling, Identification, and Control - MIC 2007}, publisher = {Acta Press}, year = {2007}, pages = {464--469}, note = {ISBN 978-0-88896-633-1 / 978-0-88986-635-5} } |
Gáspár P and Szederkényi G (2007), "Combined LPV and nonlinear control of an active suspension system", In Proc. of the 2007 IEEE International Symposium on Industrial Electronics (ISIE2007). Vigo, Spain, June, 2007. , pp. 215-220.
[BibTeX] |
BibTeX:
@conference{Gaspar2007, author = {P. Gáspár and G. Szederkényi}, title = {Combined LPV and nonlinear control of an active suspension system}, booktitle = {Proc. of the 2007 IEEE International Symposium on Industrial Electronics (ISIE2007)}, year = {2007}, pages = {215--220}, note = {ISBN: 1-4244-0755-9} } |
Hangos KM and Szederkényi G (1999), "Dinamikus Rendszerek Paramétereinek Becslése (Lecture Notes)" Veszprém Veszprémi Egyetemi Kiadó.
[BibTeX] |
BibTeX:
@book{Hangos1999, author = {K. M. Hangos and G. Szederkényi}, title = {Dinamikus Rendszerek Paramétereinek Becslése (Lecture Notes)}, publisher = {Veszprémi Egyetemi Kiadó}, year = {1999} } |
Hangos KM, Szederkényi G and Bokor J (1999), "Grey-Box Characterization of Nonlinear Process Systems" Budapest, Hungary (SCL-01-1999)
[BibTeX] |
BibTeX:
@techreport{Hangos1999a, author = {K. M. Hangos and G. Szederkényi and J. Bokor}, title = {Grey-Box Characterization of Nonlinear Process Systems}, year = {1999}, number = {SCL-01-1999} } |
Hangos K and Szederkényi G (1999), "Grey box process modeling for fault detection and isolation", In European Control Conference -- ECC 99. Karlsruhe, Germany , pp. 1-6 (on CD).
[BibTeX] |
BibTeX:
@conference{Hangos1999b, author = {K.M. Hangos and G. Szederkényi}, title = {Grey box process modeling for fault detection and isolation}, booktitle = {European Control Conference -- ECC 99}, year = {1999}, pages = {1--6 (on CD)} } |
Hangos KM, Bokor J and Szederkényi G (2000), "Analysis and Control of Nonlinear Process Systems" Budapest, Hungary (SCL-03-2000)
[BibTeX] |
BibTeX:
@techreport{Hangos2000, author = {K. M. Hangos and J. Bokor and G. Szederkényi}, title = {Analysis and Control of Nonlinear Process Systems}, year = {2000}, number = {SCL-03-2000} } |
Hangos KM, Bokor J and Szederkényi G (2000), "Grey box characterization of nonlinear process systems", In Proceedings of the 9th Nordic Process Control Workshop. , pp. 89-105.
[BibTeX] |
BibTeX:
@conference{Hangos2000a, author = {K. M. Hangos and J. Bokor and G. Szederkényi}, title = {Grey box characterization of nonlinear process systems}, booktitle = {Proceedings of the 9th Nordic Process Control Workshop}, year = {2000}, pages = {89--105} } |
Hangos K, Bokor J and Szederkényi G (2001), "Hamiltonian view on process systems", AIChE Journal. Vol. 47, pp. 1819-1831. |
Abstract: The thermodynamic approach of analyzing structural stability of process plants was extended to construct the simple Hamiltonian model of lumped process systems. This type of model enables us to design a nonlinear PD feedback controller for passivation and loop shaping. This approach is applicable for lumped process systems where Kirchhoff convective transport takes place together with the transfer and sources of various types, and the manipulable input variables are the flow rates. Systems with constant mass holdup and uniform pressure in every balance volume satisfy these conditions. General results are shown by simple examples of practical importance: on a bilinear heat exchanger cell and on an isotherm CSTR with nonlinear reaction. |
BibTeX:
@article{Hangos2001a, author = {K.M. Hangos and J. Bokor and G. Szederkényi}, title = {Hamiltonian view on process systems}, journal = {AIChE Journal}, year = {2001}, volume = {47}, pages = {1819--1831}, doi = {10.1002/aic.690470813} } |
Hangos K, Bokor J and Szederkényi G (2002), "Computer Controlled Systems -- 2nd edition with examples" Veszprémi Egyetemi Kiadó.
[BibTeX] |
BibTeX:
@book{Hangos2002, author = {Katalin Hangos and József Bokor and Gábor Szederkényi}, title = {Computer Controlled Systems -- 2nd edition with examples}, publisher = {Veszprémi Egyetemi Kiadó}, year = {2002} } |
Hangos K, Szederkényi G and Tuza Z (2004), "The effect of model simplification assumptions on the differential index of lumped process models", Computers and Chemical Engineering. Vol. 28, pp. 129-137. |
Abstract: The effect of model simplification assumptions on the differential index of differential-algebraic equation (DAE) process models is investigated in this paper. A process model is considered as the set of model equations in the form of a DAE system together with a suitable specification forming a zero degree of freedom model. Such a model is described by its equation variable graph. The effect of model simplification assumptions is analyzed by describing them as graph transformations acting on the structure graph of the process model. Efficient incremental graphtheoretic algorithms are proposed to follow the changes in the variable-equation assignments and for analyzing the changes in the differential index during the model simplification phase of the modelling process. The algorithms provide guidelines on how to modify the specification in order to obtain an index 1 model after model simplification. A case study with different transformations is used to demonstrate the operation of the algorithms and to follow the effect of constant and steady-state assumptions on the differential index of a simple process model. |
BibTeX:
@article{Hangos2004, author = {K.M. Hangos and G. Szederkényi and Zs. Tuza}, title = {The effect of model simplification assumptions on the differential index of lumped process models}, journal = {Computers and Chemical Engineering}, year = {2004}, volume = {28}, pages = {129--137}, doi = {10.1016/S0098-1354(03)00166-2} } |
Hangos K, Bokor J and Szederkényi G (2004), "Analysis and Control of Nonlinear Process Systems" Springer.
[BibTeX] |
BibTeX:
@book{Hangos2004a, author = {K. Hangos and J. Bokor and G. Szederkényi}, title = {Analysis and Control of Nonlinear Process Systems}, publisher = {Springer}, year = {2004} } |
Hangos K and Szederkényi G (2004), "Process systems: theory and applications from different aspects", ERCIM News. Vol. no. 56., pp. 35-36.
[BibTeX] |
BibTeX:
@article{Hangos2004b, author = {K.M. Hangos and G. Szederkényi}, title = {Process systems: theory and applications from different aspects}, journal = {ERCIM News}, year = {2004}, volume = {no. 56.}, pages = {35--36} } |
Hangos K and Szederkényi G (2007), "Thermodynamical foundations of passivity based process control" , pp. 29. Springer-Verlag.
[BibTeX] |
BibTeX:
@inbook{Hangos2007, author = {K.M. Hangos and G. Szederkényi}, editor = {Jie Bao and Peter Lee}, title = {Thermodynamical foundations of passivity based process control}, publisher = {Springer-Verlag}, year = {2007}, pages = {29}, note = {Chapter 8 in "Process Control: The Passive Systems Approach" by Jie Bao and Peter L. Lee, Springer-Verlag, London, 2007, ISBN: 978-1-84628-892-0, 253 pages} } |
Kanyár B, Eged K, Kis Z, Nényei Á and Szederkényi G (1999), "Radionuklidok transzportjának modellezése a talaj-növény rendszerek esetén, szcenárió vizsgálatok", In Új módszerek a mezögazdaságban. Szarvas, Hungary
[BibTeX] |
BibTeX:
@conference{Kanyar1999, author = {B. Kanyár and K. Eged and Z. Kis and Á. Nényei and G. Szederkényi}, title = {Radionuklidok transzportjának modellezése a talaj-növény rendszerek esetén, szcenárió vizsgálatok}, booktitle = {Új módszerek a mezögazdaságban}, year = {1999} } |
Magyar A, Ingram G, Pongrácz B, Szederkényi G and Hangos K (2003), "On some properties of quasi-polynomial ordinary differential equations and differential-algebraic equations" Budapest
[BibTeX] |
BibTeX:
@techreport{Magyar2003, author = {A. Magyar and G. Ingram and B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {On some properties of quasi-polynomial ordinary differential equations and differential-algebraic equations}, year = {2003} } |
Magyar A, Szederkényi G and Hangos K (2004), "Quadratic stability of process systems in generalized Lotka-Volterra form", In 6th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2004. Stuttgart, Germany, Sept., 2004. , pp. 357-362.
[BibTeX] |
BibTeX:
@conference{Magyar2004, author = {A. Magyar and G. Szederkényi and K.M. Hangos}, title = {Quadratic stability of process systems in generalized Lotka-Volterra form}, booktitle = {6th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2004}, year = {2004}, pages = {357--362} } |
Magyar A, Szederkényi G and Hangos KM (2005), "Quasi-polynomial System Representation for the Analysis and Control of Nonlinear Systems", In Proceedings of 16th IFAC World Congress. Prague, Czech Republic, June, 2005. , pp. Tu-A22-TO/5 (on CD).
[BibTeX] |
BibTeX:
@conference{Magyar2005a, author = {A. Magyar and G. Szederkényi and K. M. Hangos}, title = {Quasi-polynomial System Representation for the Analysis and Control of Nonlinear Systems}, booktitle = {Proceedings of 16th IFAC World Congress}, year = {2005}, pages = {Tu-A22-TO/5 (on CD)}, note = {on CD} } |
Nacsa J, Kovács G and Szederkényi G (2000), "Intelligent alert state detection and switching order generation at the 400/120 kV substation of the Paks Nuclear Power Plant", In 4th IFAC Symposium on Fault Detection and Safety for Technical Processes (SAFEPROCESS 2000). Budapest, Hungary , pp. 1127-1132.
[BibTeX] |
BibTeX:
@conference{Nacsa2000, author = {J. Nacsa and G.L. Kovács and G. Szederkényi}, title = {Intelligent alert state detection and switching order generation at the 400/120 kV substation of the Paks Nuclear Power Plant}, booktitle = {4th IFAC Symposium on Fault Detection and Safety for Technical Processes (SAFEPROCESS 2000)}, year = {2000}, pages = {1127--1132} } |
Otero-Muras I, Szederkényi G, Hangos K and Alonso A (2006), "Dynamic analysis and control of biochemical reaction networks", In 5th Vienna International Conference on Mathematical Modelling - MATHMOD 2006. Vienna, Austria, February, 2006. , pp. 4.1-4.10.
[BibTeX] |
BibTeX:
@conference{Otero-Muras2006, author = {I. Otero-Muras and G. Szederkényi and K.M. Hangos and A.A. Alonso}, title = {Dynamic analysis and control of biochemical reaction networks}, booktitle = {5th Vienna International Conference on Mathematical Modelling - MATHMOD 2006}, year = {2006}, pages = {4.1--4.10} } |
Otero-Muras I, Szederkényi G, Alonso A and Hangos K (2006), "Dynamic analysis and control of chemical and biochemical reaction networks", In International Symposium on Advanced Control of Chemical Processes - ADCHEM 2006. Gramado, Brazil, April, 2006. , pp. 165-170.
[BibTeX] |
BibTeX:
@conference{Otero-Muras2006a, author = {I. Otero-Muras and G. Szederkényi and A.A. Alonso and K.M. Hangos}, title = {Dynamic analysis and control of chemical and biochemical reaction networks}, booktitle = {International Symposium on Advanced Control of Chemical Processes - ADCHEM 2006}, year = {2006}, pages = {165--170} } |
Otero-Muras I, Szederkényi G, Hangos K and Alonso A (2008), "Dynamic analysis and control of biochemical reaction networks", Mathematics and Computers in Simulation. Vol. 79(4), pp. 999-1009. |
Abstract: In the present work, we combine the concepts and tools from Irreversible Thermodynamics and Control Theory in a contribution to unravel the origin of complex nonlinear behaviour in biochemical networks. Regarding cells as thermodynamic systems, we can consider dynamic evolution of intracellular processes in terms of the combined action of an endogenous entropy production and the entropy flux associated to chemicals passing through the control volume. Based on a generalized description of biochemical systems, a physically motivated storage function is constructed and used for stability analysis. In this way, the entropy flux of open systems can be meaningfully modified by efficient nonlinear control schemes capable of network stabilization, and irreversible thermodynamics provide us with the physical insight to further interpret the controlled response. |
BibTeX:
@article{Otero-Muras2008, author = {I. Otero-Muras and G. Szederkényi and K.M. Hangos and A.A. Alonso}, title = {Dynamic analysis and control of biochemical reaction networks}, journal = {Mathematics and Computers in Simulation}, year = {2008}, volume = {79}, number = {4}, pages = {999-1009}, doi = {10.1016/j.matcom.2008.02.019} } |
Péni T, Szederkényi G and Hangos K (2003), "Nonlinear dynamic output feedback control of fermentation processes", In Process Control '03. Strbske Pleso, Slovakia , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Peni2003, author = {T. Péni and G. Szederkényi and K.M. Hangos}, title = {Nonlinear dynamic output feedback control of fermentation processes}, booktitle = {Process Control '03}, year = {2003}, pages = {on CD}, note = {ISBN: 80-227-1902-1} } |
Péni T, Szederkényi G, Bokor J and Hangos K (2004), "Dynamic inversion based velocity tracking control of road vehicles", In 6th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2004. Stuttgart, Germany, Sept., 2004. , pp. 1199-1204.
[BibTeX] |
BibTeX:
@conference{Peni2004, author = {T. Péni and G. Szederkényi and J. Bokor and K.M. Hangos}, title = {Dynamic inversion based velocity tracking control of road vehicles}, booktitle = {6th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2004}, year = {2004}, pages = {1199--1204} } |
Péni T, Varga I, Szederkényi G and Bokor J (2005), "Robust model predictive control with state estimation for an industrial pressurizer system", Hungarian Journal of Industrial Chemistry. Vol. 33, pp. 89-96. |
Abstract: Robust model predictive control of an industrial pressurizer is presented in this paper. The physical model of the system is based on first engineering principles and the model parameters have been previously identified from measured data. To satisfy the hard constraints on the state variables and the input even in the presence of disturbances, the so-called single policy robust model predictive control method is applied. The maximal admissible level set, the disturbance invariant set and the terminal sets are determined for the system. Simulation results show that the proposed controller satisfies all the requirements and shows good time-domain behavior. |
BibTeX:
@article{Peni2005, author = {T. Péni and I. Varga and G. Szederkényi and J. Bokor}, title = {Robust model predictive control with state estimation for an industrial pressurizer system}, journal = {Hungarian Journal of Industrial Chemistry}, year = {2005}, volume = {33}, pages = {89--96} } |
Péni T, Varga I, Szederkényi G and Bokor J (2006), "Robust model predictive control of a nuclear power plant pressurizer subsystem", In 25th IASTED International Conference, Modeling, Identification, and Control - MIC 2006. Lanzarote, Spain, February, 2006. , pp. 167-172.
[BibTeX] |
BibTeX:
@conference{Peni2006, author = {T. Péni and I. Varga and G. Szederkényi and J. Bokor}, title = {Robust model predictive control of a nuclear power plant pressurizer subsystem}, booktitle = {25th IASTED International Conference, Modeling, Identification, and Control - MIC 2006}, year = {2006}, pages = {167--172} } |
Péni T, Szederkényi G and Bokor J (2007), "Model predictive control of the hybrid primary circuit dynamics in a pressurized water nuclear power plant", In Proc. of the European Control Conference (ECC 2007). Kos, Greece, July, 2007. , pp. 5361-5367.
[BibTeX] |
BibTeX:
@conference{Peni2007a, author = {T. Péni and G. Szederkényi and J. Bokor}, title = {Model predictive control of the hybrid primary circuit dynamics in a pressurized water nuclear power plant}, booktitle = {Proc. of the European Control Conference (ECC 2007)}, year = {2007}, pages = {5361--5367}, note = {ISBN: 978-960-89028-5-5} } |
Pongrácz B, Szederkényi G and Hangos KM (2003), "The Effect of Algebraic Equations on the Stability of Process Systems Modelled by Differential Algebraic Equations", In Proceedings of the 13th European Symposium on Computer Aided Process Engineering - ESCAPE-13. Lappenrantaa, Finland , pp. 857-862.
[BibTeX] |
BibTeX:
@conference{Pongr'acz2003, author = {B. Pongrácz and G. Szederkényi and K. M. Hangos}, title = {The Effect of Algebraic Equations on the Stability of Process Systems Modelled by Differential Algebraic Equations}, booktitle = {Proceedings of the 13th European Symposium on Computer Aided Process Engineering - ESCAPE-13}, year = {2003}, pages = {857--862} } |
Pongrácz B, Szederkényii G and Hangos KM (2002), "The Effect of Algebraic Equations on the Stability of Process Systems Modelled by Differential Algebraic Equations" (SCL-03-2002)
[BibTeX] |
BibTeX:
@techreport{Pongracz2002, author = {B. Pongrácz and G. Szederkényii and K. M. Hangos}, title = {The Effect of Algebraic Equations on the Stability of Process Systems Modelled by Differential Algebraic Equations}, year = {2002}, number = {SCL-03-2002} } |
Pongrácz B, Ailer P, Szederkényi G and Hangos K (2004), "Stability of zero dynamics of a low power gas turbine", In 12th Mediterranean Control Conference on Control and Automation -- MED'04. Kusadasi, Turkey , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Pongracz2004, author = {B. Pongrácz and P. Ailer and G. Szederkényi and K.M. Hangos}, title = {Stability of zero dynamics of a low power gas turbine}, booktitle = {12th Mediterranean Control Conference on Control and Automation -- MED'04}, year = {2004}, pages = {on CD} } |
Pongrácz B, Szederkényi G and Hangos K (2005), "An algorithm for determining a class of invariants in quasi-polynomial systems" Budapest, Hungary (SCL-02-2005)
[BibTeX] |
BibTeX:
@techreport{Pongracz2005, author = {B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {An algorithm for determining a class of invariants in quasi-polynomial systems}, year = {2005}, number = {SCL-02-2005} } |
Pongrácz B, Ailer P, Szederkényi G and Hangos K (2005), "Nonlinear zero dynamics and control of a low power gas turbine" Budapest, Hungary (SCL-03-2005)
[BibTeX] |
BibTeX:
@techreport{Pongracz2005a, author = {B. Pongrácz and P. Ailer and G. Szederkényi and K.M. Hangos}, title = {Nonlinear zero dynamics and control of a low power gas turbine}, year = {2005}, number = {SCL-03-2005} } |
Pongrácz B, Szederkényi G and Hangos K (2006), "An algorithm for determining a class of invariants in quasi-polynomial systems", Computer Physics Communications. Vol. 175, pp. 204-211. |
Abstract: In this paper an algorithm is proposed for the retrieval of a wide class of invariants in quasi-polynomial systems. The invariance properties of the algorithm under different transformations are discussed. The application of the algorithm is illustrated on physical and numerical examples. The algorithm has been implemented in the MATLAB computing environment. |
BibTeX:
@article{Pongracz2006, author = {B. Pongrácz and G. Szederkényi and K.M. Hangos}, title = {An algorithm for determining a class of invariants in quasi-polynomial systems}, journal = {Computer Physics Communications}, year = {2006}, volume = {175}, pages = {204--211}, doi = {10.1016/j.cpc.2006.03.003} } |
Rozgonyi S, Hangos K and Szederkényi G (2006), "Improved estimation method of region of stability for nonlinear autonomous systems" Budapest, Hungary (SCL-02-2006) |
BibTeX:
@techreport{Rozgonyi2006, author = {Sz. Rozgonyi and K.M. Hangos and G. Szederkényi}, title = {Improved estimation method of region of stability for nonlinear autonomous systems}, year = {2006}, number = {SCL-02-2006} } |
Stikkel G and Szederkényi G (2003), "Meddig teszteljünk?", Híradástechnika. Vol. 58, pp. 36-41.
[BibTeX] |
BibTeX:
@article{Stikkel2003, author = {G. Stikkel and G. Szederkényi}, title = {Meddig teszteljünk?}, journal = {Híradástechnika}, year = {2003}, volume = {58}, pages = {36--41} } |
Szederkényi G, Weyer E and Hangos K (1998), "Simultaneous Fault Detection of Heat Exchangers", In IFAC Workshop on Fault Detection and Supervision in the Chemical Process Industries. , pp. 1-6.
[BibTeX] |
BibTeX:
@conference{Szederk'enyi1998, author = {G. Szederkényi and E. Weyer and K.M. Hangos}, title = {Simultaneous Fault Detection of Heat Exchangers}, booktitle = {IFAC Workshop on Fault Detection and Supervision in the Chemical Process Industries}, year = {1998}, pages = {1--6}, note = {ISBN: 978-0080432335} } |
Szederkényi G, Eged K and Kanyár B (1997), "Nukleáris beavatkozások költség-optimális tervezése Matlab-Simulink rendszerrel", In Neumann János Kollokvium.
[BibTeX] |
BibTeX:
@conference{Szederkenyi1997, author = {G. Szederkényi and K. Eged and B. Kanyár}, title = {Nukleáris beavatkozások költség-optimális tervezése Matlab-Simulink rendszerrel}, booktitle = {Neumann János Kollokvium}, year = {1997} } |
Szederkényi G (1998), "Simultaneous fault detection of heat exhangers" Budapest, Hungary (SCL-05-1998)
[BibTeX] |
BibTeX:
@techreport{Szederkenyi1998, author = {G. Szederkényi}, title = {Simultaneous fault detection of heat exhangers}, year = {1998}, number = {SCL-05-1998} } |
Szederkényi G, Kristensen N, Hangos K and Joergensen S (2001), "Nonlinear analysis and control of a continuous fermentation process", In 11th European Symposium on Computer Aided Process Engineering (ESCAPE-11). Kolding, Denmark , pp. 787-792.
[BibTeX] |
BibTeX:
@conference{Szederkenyi2001, author = {G. Szederkényi and N.R. Kristensen and K.M. Hangos and S.B. Joergensen}, editor = {R. Gani and S.B. Joergensen}, title = {Nonlinear analysis and control of a continuous fermentation process}, booktitle = {11th European Symposium on Computer Aided Process Engineering (ESCAPE-11)}, year = {2001}, pages = {787--792} } |
Szederkényi G (2001), "Analysis and control of nonlinear fermentation processes" Budapest, Hungary (SCL-01-2001)
[BibTeX] |
BibTeX:
@techreport{Szederkenyi2001a, author = {G. Szederkényi}, title = {Analysis and control of nonlinear fermentation processes}, year = {2001}, number = {SCL-01-2001} } |
Szederkényi G, Kovács M and Hangos KM (2002), "Reachability of nonlinear fed-batch fermentation processes", International Journal of Robust and Nonlinear Control. Vol. 12, pp. 1109-1124. |
Abstract: The reachability of a simple nonlinear fed-batch fermentation process model is investigated in this paper. It is shown that the known difficulties of controlling such processes are primarily caused by the fact that the rank of the reachability distribution is always less than the number of state variables. Furthermore, a co-ordinates transformation is calculated analytically that shows the nonlinear combination of the state variables which is independent of the input. The results of the reachability analysis and that of the co-ordinates transformation are independent of the source function in the system model. The results are extended to the four state variable non-isotherm case, and to nonlinear fed-batch chemical reactors with general reaction kinetics. |
BibTeX:
@article{Szederkenyi2002a, author = {G. Szederkényi and M. Kovács and K. M. Hangos}, title = {Reachability of nonlinear fed-batch fermentation processes}, journal = {International Journal of Robust and Nonlinear Control}, year = {2002}, volume = {12}, pages = {1109--1124}, doi = {10.1002/rnc.686} } |
Szederkényi G, Kristensen NR, Hangos KM and Jorgensen SB (2002), "Nonlinear analysis and control of a continuous fermentation process", Computers and Chemical Engineering. Vol. 26, pp. 659-670. |
Abstract: Different types of nonlinear controllers are designed and compared for a simple continuous bioreactor operating near optimal productivity. This operating point is located close to a fold bifurcation point. Nonlinear analysis of stability, controllability and zero dynamics is used to investigate open-loop system properties, to explore the possible control difficulties and to select the system output to be used in the control structure. A wide range of controllers are tested including pole placement and LQ controllers, feedback and inputoutput linearization controllers and a nonlinear controller based on direct passivation. The comparison is based on time-domain performance and on investigating the stability region, robustness and tuning possibilities of the controllers. Controllers using partial state feedback of the substrate concentration and not directly depending on the reaction rate are recommended for the simple fermenter. Passivity based controllers have been found to be globally stable, not very sensitive to the uncertainties in the reaction rate and controller parameter but they require full nonlinear state feedback. |
BibTeX:
@article{Szederkenyi2002b, author = {G. Szederkényi and N. R. Kristensen and K. M. Hangos and S. B. Jorgensen}, title = {Nonlinear analysis and control of a continuous fermentation process}, journal = {Computers and Chemical Engineering}, year = {2002}, volume = {26}, pages = {659--670}, doi = {10.1016/S0098-1354(01)00793-1} } |
Szederkényi G, Hangos K, Bokor J and Vámos T (2002), "Linear output selection for feedback linearization", In 15th IFAC World Congress on Automatic Control. Barcelona, Spain , pp. 1-6 (on CD).
[BibTeX] |
BibTeX:
@conference{Szederkenyi2002c, author = {G. Szederkényi and K.M. Hangos and J. Bokor and T. Vámos}, editor = {E.F. Camacho and L. Basanez and J.A. de la Puente}, title = {Linear output selection for feedback linearization}, booktitle = {15th IFAC World Congress on Automatic Control}, year = {2002}, pages = {1--6 (on CD)} } |
Szederkényi G (2002), "Grey-box approach for the diagnosis, analysis and control of nonlinear process systems". Thesis at: Information Science PhD School, University of Veszprém. Veszprém, Hungary
[BibTeX] |
BibTeX:
@phdthesis{Szederkenyi2002d, author = {G. Szederkényi}, title = {Grey-box approach for the diagnosis, analysis and control of nonlinear process systems}, school = {Information Science PhD School, University of Veszprém}, year = {2002} } |
Szederkényi G, Schné T and Hangos K (2003), "Zero dynamics of continuous and fed-batch bioreactors", In European Control Conference -- ECC 2003. Cambridge, UK , pp. on CD.
[BibTeX] |
BibTeX:
@conference{Szederkenyi2003, author = {G. Szederkényi and T. Schné and K.M. Hangos}, title = {Zero dynamics of continuous and fed-batch bioreactors}, booktitle = {European Control Conference -- ECC 2003}, year = {2003}, pages = {on CD} } |
Szederkényi G and Hangos K (2004), "Global stability and quadratic Hamiltonian structure in Lotka-Volterra and quasi-polynomial systems", Physics Letters A. Vol. 324, pp. 437-445. |
Abstract: We show that the global stability of quasi-polynomial (QP) and LotkaVolterra (LV) systems with the well-known logarithmic Lyapunov function is equivalent to the existence of a local generalized dissipative Hamiltonian description of the LV system with a diagonal quadratic form as a Hamiltonian function. The Hamiltonian function can be calculated and the quadratic dissipativity neighborhood of the origin can be estimated by solving linear matrix inequalities. |
BibTeX:
@article{Szederkenyi2004, author = {G. Szederkényi and K.M. Hangos}, title = {Global stability and quadratic Hamiltonian structure in Lotka-Volterra and quasi-polynomial systems}, journal = {Physics Letters A}, year = {2004}, volume = {324}, pages = {437--445}, doi = {10.1016/j.physleta.2004.03.012} } |
Szederkényi G, Hangos K and Magyar A (2005), "On the time-reparametrization of quasi-polynomial systems", Physics Letters A. Vol. 334, pp. 288-294. |
Abstract: In this Letter we show that an important type of time-reparametrization problem in quasi-polynomial systems is equivalent to the feasibility of a suitably constructed bilinear matrix inequality where the unknowns are the coefficients of the Lyapunov function and the exponents in the time-reparametrization transformation. |
BibTeX:
@article{Szederkenyi2005, author = {G. Szederkényi and K.M. Hangos and A. Magyar}, title = {On the time-reparametrization of quasi-polynomial systems}, journal = {Physics Letters A}, year = {2005}, volume = {334}, pages = {288--294}, doi = {10.1016/j.physleta.2004.11.026} } |
Tesar L, Dolanc G, Szederkényi G, Kárny M, Kadlec J, Juricic D, Hangos K and Kinnaert M (1999), "A Toolbox For Model-Based Fault Detection and Isolation", In European Control Conference - ECC 99. Karlsruhe, Germany , pp. 1-6 (on CD).
[BibTeX] |
BibTeX:
@conference{Tesar1999, author = {Tesar, L. and Dolanc, G. and Szederkényi, G. and Kárny, M. and Kadlec, J. and Juricic, D. and Hangos, K.M. and Kinnaert, M.}, title = {A Toolbox For Model-Based Fault Detection and Isolation}, booktitle = {European Control Conference - ECC 99}, year = {1999}, pages = {1--6 (on CD)} } |
Tuza Z, Szederkényi G and Hangos K (2002), "The effect of modeling assumptions on the differential index of lumped process models", In European Symposium on Computer Aided Process Engineering - ESCAPE 12.. , pp. 979-984.
[BibTeX] |
BibTeX:
@conference{Tuza2002, author = {Zs. Tuza and G. Szederkényi and K.M. Hangos}, editor = {J. Grievink and J. van Schijndel}, title = {The effect of modeling assumptions on the differential index of lumped process models}, booktitle = {European Symposium on Computer Aided Process Engineering - ESCAPE 12.}, year = {2002}, pages = {979-984} } |
Varga I, Szederkényi G, Hangos K and Bokor J (2006), "Modeling and model identification of a pressurizer at the Paks Nuclear Power Plant", In 14th IFAC Symposium on System Identification -- SYSID 2006. Newcastle, Australia, March, 2006. , pp. 678-683.
[BibTeX] |
BibTeX:
@conference{Varga2006, author = {I. Varga and G. Szederkényi and K.M. Hangos and J. Bokor}, title = {Modeling and model identification of a pressurizer at the Paks Nuclear Power Plant}, booktitle = {14th IFAC Symposium on System Identification -- SYSID 2006}, year = {2006}, pages = {678--683} } |
Weyer E, Szederkényi G and Hangos K (2000), "Grey Box Fault Detection of Heat Exchangers", Control Engineering Practice. Vol. 8, pp. 121-131. |
Abstract: A grey-box model-based method for fault diagnosis is proposed in this paper. The method is based on a first principle model of the process unit, i.e. a heat exchanger, and on a grey-box model of the fault, i.e. the deterioration of the heat transfer surface by aging. During normal operating conditions the heat transfer coefficient is constant or slowly decreasing due to material settling on the heat transfer surface. In old heat exchangers big pieces of settled material can break off causing damage. When this happens, the heat transfer coefficients will rise sharply. In the proposed method a recursive least-squares estimator with forgetting factor is used to track the heat transfer coefficients. The settled material breakage fault is detected via detection of abrupt positive jump in the estimated heat transfer coefficients using a cumulative sum (CUSUM) test. The capability to detect faults in any industrial equipment is heavily dependent on the availability of suitable measurements. For heat exchangers the variables related to the in- and outflows of the equipment (flowrates and temperatures) are usually measured, but measurements along the equipment length are rarely available. Therefore, the possibilities of fault location in space are rather limited. However, simplified models can be used for fault detection in this case. Moreover, a fault detection method is proposed with the possibility of spatial fault location when measurements along the cold side are available. The proposed method is illustrated on simulated examples with different measurement situations. |
BibTeX:
@article{Weyer2000, author = {E. Weyer and G. Szederkényi and K.M. Hangos}, title = {Grey Box Fault Detection of Heat Exchangers}, journal = {Control Engineering Practice}, year = {2000}, volume = {8}, pages = {121--131}, doi = {10.1016/S0967-0661(99)00132-X} } |