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Reaction Kinetic Form for Lumped Process System Models

IFAC Proceedings Volumes 2013年第14期46卷 48-53页

作者： Katalin M. Hangos Gábor Szederkényi Antonio A. Alonso Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary (Bio)Process Engineering Group IIM-CSIC Spanish National Research Council C/Eduardo Cabello 6 36208 Vigo Spain

The class of isotherm lumped process systems with constant overall mass in each of its balance volumes is considered in this paper. It is shown that the convection and transfer mechanisms can be described by a mass action law chemical reaction network (MAL CRN) with only linear kinetics where the in- and outflow terms are represented using the zero complex. This gives rise to a convection and transfer reaction sub-graph that connects atomic complexes consisting of the components in the balance volumes of the system. The real chemical reactions in each of the balance volumes can be described by their own CRNs, where the chemical reaction sub-graphs may be disconnected from the convection and transfer reaction sub-graph when nonlinear reactions occur. In the case of chemical reactions with a finite number of steady state points, the underlying linear dynamical system enables us to construct a dynamically similar linear overall reaction graph for the whole process system. The resulting overall reaction graph can be used for structural stability analysis by applying its graph theoretical properties.

关键词： Process control Chemical variables control Modelling Graph theoretic models Structural stability

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ATP production optimization in biochemical mass action models with protein turnover

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IFAC Proceedings Volumes 2013年第14期46卷 42-47页

作者： Dávid Csercsik Gábor Szederkényi Faculty Information Technology Pázmány Peter Catholic University P.O. Box 278 H-1444 Budapest Hungary Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences H-1518 P.O. Box 63 Budapest Hungary

We introduce a simple approach to account for the ATP consumption and production in the case of mass action models of metabolic pathways including protein turnover. Under some simplifying assumptions, the method makes it possible to characterize the optimal rate of enzyme synthesis if the substrate concentrations and other rate constants are known. Furthermore we demonstrate that the proposed approach is capable of the comparison of the efficiency of different feedback laws in dynamic environment, considering time-varying substrate concentration.

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An empirical analysis of social interaction on tobacco-oriented social networks

An empirical analysis of social interaction on tobacco-orien...

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2013 International Conference for Smart Health, ICSH 2013

作者： Liang, Yunji Zheng, Xiaolong Zeng, Daniel Dajun Zhou, Xingshe Leischow, Scott School of Computer Science Northwestern Polytechnical University Xi'an China Department of Management Information System University of Arizona Tucson AZ United States State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Dongguan Research Institute of CASIA Cloud Computing Center Chinese Academy of Sciences Songshan Lake Dongguan China Mayo Clinic in Arizona Phoenix AZ United States

ISBN: (纸本)9783642398438

Social media is widely utilized in the tobacco control campaigns. It is a great challenge to evaluate the efficiency of tobacco control policies on social network sites and find gaps among tobacco-oriented social networks. In this paper, we construct three tobacco-oriented social networks according to user interaction on Facebook tobacco-related fan pages. We further investigate the interaction patterns including temporal distribution and interaction patterns to reveal the differences of tobacco-oriented social networks. Our empirical analysis demonstrates that: 1) the user interaction on the pro-tobacco fan pages is more active. Fan pages for tobacco promotion are more successful in obtaining more user attention. 2) The gap between tobacco promotion and tobacco control is widening. These empirical results can provide us significant insights into understanding the evolutionary patterns of social interaction in tobacco-oriented social networks and further help the government departments of tobacco control to make reasonable decisions. © 2013 Springer-Verlag.

关键词： Tobacco

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Realizing system poles identification on the unit disc based on Laguerre representations and hyperbolic metrics

Realizing system poles identification on the unit disc based...

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Mediterranean Conference on control and automation (MED)

作者： Alexandros Soumelidis József Bokor Ferenc Schipp Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary MTA-BME Control Engineering Research Group Budapest University of Technology and Economics Budapest Hungary Department of Numerical Analysis Faculty of Informatics Eotvos Lorand University Budapest Hungary

ISBN: (纸本)9781479909964

In a series of paper the authors proposed a new frequency-domain approach to identify poles in discrete-time linear systems. The discrete rational transfer function is represented in a rational Laguerre-basis, where the basis elements are expressed by powers of the Blaschke-function. This function can be interpreted as a congruence transform on the Poincaré unit disc model of the hyperbolic geometry. The identification of a pole is given as a hyperbolic transform of the limit of a quotient-sequence formed from the Laguerre-Fourier coefficients. In this paper the opportunities of reliably computing the poles are analyzed, and some algorithms are proposed for practical use.

关键词： Convergence Estimation Transforms Transfer functions Measurement Geometry Hafnium

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Fault detection of electrical flight control system actuators using parameter dependent estimation

Fault detection of electrical flight control system actuator...

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8th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes, SAFEPROCESS 2012

作者： Vanek, Bálint Szabó, Zoltán Edelmayer, András Bokor, József Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Hungary

ISBN: (纸本)9783902823090

The present article details a method suitable for fault detection of hydraulic flight control system actuators. A model based method is discussed, which use the linear parameter-varying (LPV) framework, which leads to a minimum number of tuning knobs, aiming towards industrial use and certification. The successive steps of the design from deriving mathematical models of the actuator dynamics through filter synthesis, till evaluation of the proposed method on industrial verification campaign are detailed. The proposed framework can be implemented in a flight control computer to detect the rare occurrence of real faults on a hydraulic actuator of an aircraft and isolate them according to the specification. © 2012 IFAC.

关键词： Flight control systems

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Performance comparison of geometric and H∞ fault detection filter design: A commercial aircraft example

Performance comparison of geometric and H∞ fault detection ...

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8th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes, SAFEPROCESS 2012

作者： Vanek, Bálint Szabó, Zoltán Edelmayer, András Bokor, József Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Hungary

ISBN: (纸本)9783902823090

Geometric fault detection and isolation filters are known for having excellent fault isolation, fault reconstruction and sensitivity properties under small modeling uncertainty and noise. However they are assumed to be sensitive to model uncertainty and noise. This paper proposes a method to incorporate model uncertainty into the design. First, a geometric filter is designed on the nominal plant. Next a robust model matching problem is solved to design a post-filter that augments the performance of the geometric filter over the set of uncertain plants. The method is compared with the standard H ∞ robust FDI filter design procedure, where the robustness and performance of the residual generation are solved in one step, but disturbance rejection and fault sensitivity are not decoupled from each other. Finally, an aircraft dynamics example is presented to detect and isolate aileron actuator faults to asses the performance of the different filter designs. © 2012 IFAC.

关键词： Uncertainty analysis

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Design and analysis of an automated heavy vehicle platoon

Design and analysis of an automated heavy vehicle platoon

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9th International Conference on Informatics in control, automation and Robotics, ICINCO 2012

作者： Rödönyi, Gábor Gáspár, Péter Bokor, József Palkovics, László Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary Knorr-Bremse Brake-systems Gmbh Budapest Hungary

ISBN: (纸本)9789898565211

From the model set identification through the control design and robust performance analysis to the implementation and experimental verification, the whole design process for an automated vehicle platoon is presented. The goal is to demonstrate that safe platooning with acceptable performance can be achieved by utilizing the services already available on every commercial heavy trucks with automated gearbox. Using the services, the control design reduces to the selection of four design parameters, the static gain coefficients of the outputfeedback- input-feed-forward controller common for every vehicle. It is experimentally demonstrated, that in normal driving maneuvers, the spacing errors are less than three meters.

关键词： Commercial vehicles

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Applying hyperbolic wavelets in frequency domain identification

Applying hyperbolic wavelets in frequency domain identificat...

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9th International Conference on Informatics in control, automation and Robotics, ICINCO 2012

作者： Soumelidis, Alexandros Bokor, József Schipp, Ferenc Computer and Automation Research Institute Systems and Control Laboratory Budapest Hungary Department of Numerical Analysis Ëotvos Loŕand University Budapest Hungary

ISBN: (纸本)9789898565211

The paper elaborates a hyperbolic wavelet construction for representing signals in the Hardy space H2 on the unit disc. An efficient computing scheme based on the matrix form of the representation is worked out. The wavelet coefficients can be computed on the basis of discrete time-domain measurements. This wavelet is used to reconstruct poles of functions in H 2 as the basis of nonparametric frequency-domain identification of discrete-time signals and systems. Copyright © 2012 SciTePress.

关键词： Frequency domain analysis

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Performance Comparison of Geometric and H ∞ Fault Detection Filter Design: A Commercial Aircraft Example *

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IFAC Proceedings Volumes 2012年第20期45卷 1161-1166页

作者： Bálint Vanek Zoltán Szabó András Edelmayer József Bokor Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences

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Fault detection of electrical flight control system actuators using parameter dependent estimation *

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IFAC Proceedings Volumes 2012年第20期45卷 1358-1363页

作者： Bálint Vanek Zoltán Szabó András Edelmayer Jázsef Bokor Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences

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