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European control Conference (ECC)

作者： György Lipták Gábor Szederkényi Katalin M. Hangos Process Control Research Group MTA SZTAKI Budapest Hungary Faculty of Information Technology and Bionics Pázmány Péter Catholic University Budapest Hungary Department of Electrical Engineering and Information Systems University of Pannonia Hungary

ISBN: (纸本)9781479947287

In this paper, an optimization based state feedback design is proposed for polynomial models that transforms an open-loop system into weakly reversible kinetic form with minimal deficiency, if possible. Therefore, the suggested method is able to decide whether the deficiency zero property and weak reversibility of the closed loop system (that guarantees a robust stability property) is achievable by the given feedback structure. The approach integrates feedback design and previous computational methods for computing dynamically equivalent realizations of kinetic systems. The method assumes a linear input structure of the open loop system, and uses a polynomial feedback constructed from the monomials of the original system possibly extended by new ones. The proposed method is illustrated on two simple examples.

关键词： Kinetic theory Polynomials Closed loop systems Vectors Couplings Optimization Chemicals

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Reaction kinetic form for lumped process system models

Reaction kinetic form for lumped process system models

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1st IFAC Workshop on Thermodynamic Foundations of Mathematical systems Theory, TFMST 2013

作者： Hangos, Katalin M. Szederkényi, Gábor Alonso, Antonio A. Department of Systems and Control Laboratory Process Control Research Group Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary Process Engineering Group IIM-CSIC C/Eduardo Cabello 6 36208 Vigo Spain

ISBN: (纸本)9783902823403

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. Copyright © 2013 IFAC.

关键词： process control

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control Lyapunov function based feedback design for quasi-polynomial systems

Control Lyapunov function based feedback design for quasi-po...

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9th IFAC Symposium on Nonlinear control systems, NOLCOS 2013

作者： Magyar, Attila Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia Veszprem Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

ISBN: (纸本)9783902823472

The aim of this work is to present an entropy-like Lyapunov function based dynamic feedback design technique for quasi-polynomial and Lotka-Volterra systems. It is shown, that the dynamic feedback design problem is equivalent to the feasibility of a bilinear matrix inequality. The problem is also formulated as a control Lyapunov function based feedback design when the Lyapunov function parameters are given, the solution of this problem can be obtained by solving a linear matrix inequality. The developed method is illustrated on a simple numerical example. © IFAC.

关键词： Design

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control Lyapunov function based feedback design for quasi-polynomial systems

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IFAC Proceedings Volumes 2013年第23期46卷 128-133页

作者： Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

关键词： Lyapunov stability nonlinear systems stabilizing feedback dynamic feedback optimization problems

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Reaction Kinetic Form for Lumped process System Models

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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

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

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Flexibility vs. security in linked enterprise data access control graphs

Flexibility vs. security in linked enterprise data access co...

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International Symposium on Information Assurance and Security (IAS)

作者： Markus Graube Patricia Ortiz Manuel Carnerero Oscar Lázaro Mikel Uriarte Leon Urbas Chair for Process Control Systems Engineering Technische Universität Dresden Germany R&D Innovalia Association S.A Bilbao Spain R&D Nextel S.A Bilbao Spain Technische Universitat Dresden Dresden Sachsen DE

Linked Data offers easy extensibility and interoperability of information spaces. This provides a great potential for industrial companies allowing to share information with partners in a virtual enterprise. Hence, together they can become faster and more flexible which results in an advantage in the market. However, there is still the barrier to protect own information with a fine grain. Access control graphs are an approach for this issue. Information is put into different views by executing infer mechanisms on role-based policy rules. Afterwards queries are automatically rewritten at runtime in order to match the generated views and provide only data from views that should be accessible by the authenticated role. This paper demonstrates the balance between flexibility and security using this approach. The amount and complexity of the policy rules are highly dependent on the information model used. However, a moderate restriction of the huge flexibility in the information modelling allows for few rules but those are powerful ones. Additionally, the approach allows can also be leveraged for consistency checking of Linked Data data structures. Thus, clients can rely on these information invariants and the information provider can rely on the fact that fine grained access is granted.

关键词： Irrigation Companies Semantics Servers Standards Maintenance engineering

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Computing dynamically equivalent realizations of biochemical reaction networks with mass conservation

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AIP Conference Proceedings 2013年第1期1558卷 2356-2359页

作者： János Rudan Gábor Szederkényi Katalin M. Hangos Faculty of Information Technology Pázmány Péter Catholic University Práter u. 50/a H-1083 Budapest Hungary Faculty of Information Technology Pázmány Péter Catholic University Práter u. 50/a H-1083 Budapest Hungary and Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences. Hungary Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences. Kende u. 13-17 H-1111 Budapest Hungary and Dept. of Electrical Engineering and Information Systems Faculty of Information Technology Univer Hungary

An algorithm for the computation of mass conservative dynamically equivalent chemical reaction network structures is proposed in this paper. The algorithm is formulated in an optimization-based framework as a mixed-in...

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Formal Models for High Performance HMI engineering

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IFAC Proceedings Volumes 2012年第2期45卷 854-859页

作者： Leon Urbas Michael Obst Markus Stöss Chair of Process Control Systems Engineering Technische Universität Dresden Dresden Germany

Abstract engineering of Human Machine Interfaces for supervisory control in process industries can be characterized as an information integration task. This is particularly true for configural displays that are the core element of high performance HMI. Design and parameterization of these display units requires a large amount of data, usually readily available in the process design databases but missing in the engineering systems for the automation systems. This class of displays also requires further information that is not yet made available in any database or is not formal enough to provide a base for model driven HMI engineering approaches. We therefore designed a formal model of a computer aided engineering system of human-machine-interaction in supervisory control in process industries and added it to a computer aided engineering system to overcome the restrictions of the approach presented in Urbas and Doherr (2011). The model now addresses the abstraction-decomposition space of ecological interfaces by a simple hierarchical HMI level model and a method to efficiently collect information from P&IDs. This allows for task specific assemblies of process data and provides basic means to integrate standard mimics and complex displays. However, because the information integration is the core feature of configural displays, the formal basis for model based HMI engineering needed to be enhanced substantially. This paper presents the resulting core model and a graph-based search algorithm. The algorithm makes it possible to parameterize a certain set of configural displays directly from engineering data.

关键词： Human-machine interface supervisory control model driven software development computer-aided engineering graph theoretic models process automation model driven ecological interface engineering

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Beyond app-chaining: Mobile app orchestration for efficient model driven software generation

Beyond app-chaining: Mobile app orchestration for efficient ...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Jens Ziegler Markus Graube Johannes Pfeffer Leon Urbas Chair of Process Control Systems Engineering Technische Universität Dresden Germany

Mobile apps are a success story for mobile devices, particularly in the consumer sector. Tailored to a specific task, they offer optimal usability for a defined class of devices. However, today's apps are neither designed to collaborate with complex workflows nor to support these. To overcome this limitation, we developed the concept of Mobile App Orchestration. This pragmatic model driven software generation approach makes it possible to use mobile apps even in complex industrial workflows. We demonstrate the entire development process in a use case and explain solutions and challenges of our approach. An experimental evaluation of a manually conducted orchestration with 11 participants supports our design hypothesis that the proposed approach can deliver usable mobile support systems for Virtual Factories.

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On the geometry of equilibrium solutions of kinetic systems obeying the mass action law

On the geometry of equilibrium solutions of kinetic systems ...

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8th International Symposium on Advanced control of Chemical processes, ADCHEM 2012

作者： Alonso, Antonio A. Szederkényi, Gábor Process Engineering Group IIM-CSIC Spanish National Research Council C/Eduardo Cabello 6 36208 Vigo Spain Systems and Control Laboratory MTA SZTAKI Kende u. 13-17 H-1111 Budapest Hungary

ISBN: (纸本)9783902823052

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 Ak 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. © 2012 IFAC.

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