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OPTIMIZATION-BASED DECOMPOSITION OF A LARGE-SCALE SYSTEM

IFAC Proceedings Volumes 2006年第14期39卷 47-52页

作者： Branislav Rehák Czech Technical University Faculty of Electrical Engineering Department of Control Engineering Technická 2 166 27 Praha 6 Czech Republic Institute of Information Theory and Automation Academy of Sciences of the Czech Republic. P.O. Box 18 182 08 Prague Czech Republic

The problem of design of a controller for a large-scale system is studied. The design objective is to achieve behavior comparable with the standard controller that is LQ optimal. On the other hand the amount of interconnections between subsystems should be kept as small as possible. This is guaranteed by solving of an optimization problem where the number of interconnections is minimized while the difference in the values of the cost functional for the standard and decentralized controller is a constraint. To find the value of the cost of the decentralized control in presence of interconnections one can use linear matrix inequalities.

关键词： Decomposition decentralized control linear matrix inequalities

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Si(111)−α−3×3−Au phase modified by In adsorption: Stabilization of a homogeneous surface by stress relief

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Physical Review B 2006年第11期73卷 115335-115335页

作者： D. V. Gruznev I. N. Filippov D. A. Olyanich D. N. Chubenko I. A. Kuyanov A. A. Saranin A. V. Zotov V. G. Lifshits Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia

Structural transformations on the Si(111)−α−3×3−Au surface induced by In adsorption have been studied using scanning tunneling microscopy and first-principles total-energy calculations. It has been found that In adsorption results in the transformation of the 3×3−Au phase to the 3×3−(Au,In) phase. At room temperature, the transformation is limited by the interior of the original 3×3−Au domains and does not affect the domain-wall structure. Upon annealing at 600°C, the domain walls are eliminated and highly ordered almost defect-free homogeneous 3×3−(Au,In) surface develops. The 3×3−(Au,In) surface phase contains 1 monolayer (ML) of Au, 1 ML of Si and about 0.15 ML of In. Plausible mechanism of stabilization of the domain-wall-free Si(111)3×3−(Au,In) surface is the stress relief caused by In adsorption.

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EDUSCA (Educational SCAda): Features and applications

EDUSCA (Educational SCAda): Features and applications

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作者： Santos, Raúl Alves Normey-Rico, Julio E. Gómez, Alejandro Merino De Prada Moraga, Cesar Center of Sugar Tecnology University of Valladolid Edificio Alfonso VIII 47011 Valladolid Spain Department of Automation and Systems Federal University of Santa Catarina CTC-UFSC 88040-900 Florianópolis-SC Brazil Department of Systems Engineering and Automatic Control University of Valladolid Faculty of Sciences c/ Real de Burgos s/n 47011 Valladolid Spain

ISBN: (纸本)9783902661074

This paper presents EDUSCA, an EDUcational SCAda with OPC data access. EDUSCA was specially designed for automatic control education, research and operator training purposes. The developed system takes advantage of the facilities offered by the OPC communication architecture. The system allows the students to face real practical problems, could be used to train operators in plant supervision and also allows the implementation of research functionalities. Their main advantages of EDUSCA are: (i) it can be connected to any plant whenever it includes OPC communications;(ii) it is free of licenses, thus it can be installed in many computers as necessary;(iii) it can be adapted to each application requirements and (iv) it allows the implementation of a diverse set of functionalities, as for example, control algorithms. Copyright © 2006 IFAC.

关键词： Personnel training

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LPV fault detection of glucose-insulin system

LPV fault detection of glucose-insulin system

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Mediterranean Conference on control and automation (MED)

作者： L. Kovacs B. Kulcsar J. Bokor Z. Benyo Department of Control Engineering and Information Technology Faculty of Electrical Engineering and Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Control and Transport AutomLation Faculty of Transportation Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Colmputer and Automation Rearch Institute Hungarian Science Academy Budapest Hungary

A new approach is proposed in the paper for unknown glucose inlet estimation in case of diabetic patients under insensitive care in form of a linear parameter varying (LPV) model class. The nonlinear two compartment glucose-insulin system is rewritten in affine parameter varying form in order to handle the dynamics with LPV fault detection and isolation (FDI) method. The aim of the closed-loop fault detection, on the one hand, is to estimate the unknown disturbance input of the system, on the other hand to recognize the actuator fault. A parameter varying controller assures the performance requirements and stability of the system

关键词： Fault detection Sugar Diabetes Insulin Filters Automatic control Medical control systems Humans control systems Automatic generation control

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Static controller for ventilation of highway tunnels

Static controller for ventilation of highway tunnels

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作者： Ferkl, Lukáš Meinsma, Gjerrit Sládek, Oto Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technická 2 166 27 Praha 6 Czech Republic Department of Applied Mathematics Faculteit EWI University of Twente P.O. Box 217 7500 AE Enschede Netherlands Kybertec Ltd. Tovární 1112 537 01 Chrudim Czech Republic Center for Applied Cybernetics Institute of Information Theory and Automation Academy of Sciences of the Czech Republic Pod vodárenskou věží 4 182 08 Praha 8 Czech Republic

A control scheme for highway tunnels is proposed based on a static model of the highway tunnel. The controller is designed to keep the exhaust levels inside the tunnel below given limits. The controller is derived in two stages. First, a controller for an isolated ventilation section is found. Then a controller for a complex tunnel is obtained and the control is optimized by means of linear programming. The control is then simulated on a dynamical model of a highway tunnel.

关键词： controllers

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Tunnel ventilation simulation of the city ring in Prague

Tunnel ventilation simulation of the city ring in Prague

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作者： Ferkl, Lukáš Sládek, Oto Pořízek, Jan Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technicka 2 166 27 Praha 6 Czech Republic Kybertec S.r.o Tovární 1112 537 01 Chrudim Czech Republic Satra S.r.o Sokolska 32 120 00 Praha 2 Czech Republic Center for Applied Cybernetics Institute of Information Theory and Automation Academy of Sciences of the Czech Republic Pod vodarenskou věží 4 182 08 Praha 8 Czech Republic

A detailed simulation has been proposed and implemented for a complex road tunnel to be constructed in Prague, Czech Republic. The work brings new approach to functional and spatial decomposition of traffic, ventilation and exhaust tunnel subsystems allowing a simulation of dynamics. The discretization method provides a highly realistic and detailed behavior of the tunnel system. In addition, simulation of emergency situations is available. The simulation has been implemented in MATLAB.

关键词： Discrete event simulation

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An exact tracking error dynamics passive output feedback controller for a Buck-Boost-converter driven DC motor

An exact tracking error dynamics passive output feedback con...

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International Congress Power Electronics (CIEP)

作者： Jesus Linares-Flores Hebertt Sira-Ramirez Johann Reger Ramon Silva-Ortigoza Sección de Mecatrónica CINVESTAV México D.F. México Institute of Automation and Control (EIT 8.1) Universität der Bundeswehr München Neubiberg Germany Institute of Automation and Control (EIT 8.1) Faculty of Electrical Engineering and Information Technology Universitat der Bundeswehr Munchen Neubiberg Germany

This article deals with the trajectory tracking problem for the angular velocity of a DC-motor shaft using a buck-boost-converter as the switch regulated electronic drive. The main result of our proposed control scheme is that a linear time-varying controller results from the consideration of the exact tracking error dynamics and static passive output feedback controller design. The measuring of the angular velocity is not really necessary and the control law is synthesized using only a linear time-varying combination of the converter current and voltage variables. The voltage reference trajectory for the converter is generated exploiting a partial differential flatness property of the combined system. The reference trajectories of the average control and the input current are calculated via stored energy considerations and planning for the initial and final stationary regimes. The discrete switching control realization of the designed continuous feedback control law is accomplished by means of a traditional PWM-modulation scheme. Experimental results are provided

关键词： Error correction Output feedback DC motors Linear feedback control systems Electric variables control Trajectory Angular velocity Switches Pulse width modulation Shafts

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Implementation of Industrial Robot Force control Case Study: High Power Stub Grinding and Deburring

Implementation of Industrial Robot Force Control Case Study:...

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2006 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： A. Robertsson T. Olsson R. Johansson A. Blomdell K. Nilsson M. Haage B. Lauwers H. De Baerdemaeker T. Brogardh H. Brantmark Department of Automatic Control Lund University Hospital Lund Sweden Dept. of Automatic Control Lund University Sweden Dept. of Computer Science Lund University Sweden Department of Computer Science Lund University Hospital Lund Sweden Dept. of Mechanical Engineering Faculty of Engineering Heverlee Belgium Department of Mechanical Engineering Heverlee Belgium ABB Automation Technologies - Robotics Västerås Sweden

In this paper, the results from a joint industry-academia project in industrial robotic force control are presented. The extension and implementation of an external sensor system for an industrial robot system, which can be used for high-bandwidth force control, are described. Results from two industrial applications using the system are presented, a stub grinding application using a new compliant grinding end-effector integrated with the robot control system, and a deburring application with a stiff tool requiring high-bandwidth force control in six degrees of freedom. Using the system an easily reconfigurable control structure was achieved, which was able to control contact forces with a sampling bandwidth of an order of magnitude higher than for conventional robot controllers

关键词： Industrial control Service robots Force control Deburring Electrical equipment industry Robot sensing systems control systems Robot control Sensor systems Sampling methods

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Delay-dependent stability condition for uncertain linear 2-D state-delayed systems

Delay-dependent stability condition for uncertain linear 2-D...

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IEEE Conference on Decision and control

作者： Wojciech Paszke James Lam Krzysztof Galkowski Shengyuan Xu Anton Kummert Institute of Control and Computation Engineering University of Zielona Góra Zielona Góra Poland Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong Department of Automation Nanjing University of Science and Technology of PLA Nanjing China Department of Automation Nanjing University of Science and Technology Nanjing P. R. China Faculty of Electrical Information and Media Engineering University of Wuppertal Wuppertal Germany

ISBN: (纸本)1424401704

This paper addresses the problem of robust stability for uncertain two-dimensional systems with delays in the state. The uncertainty is assumed to be of norm-bounded form. To solve this problem, the Lyapunov second method is used. The resulting condition is written in terms of linear matrix inequalities and it is dependent on the size of delays. This fact allows us to reduce the conservatism in the stability analysis of two-dimensional systems with state delays. A illustrative example is given to illustrate the theoretical developments

关键词： Delay systems Linear systems Symmetric matrices Delay lines control systems Robust stability Linear matrix inequalities USA Councils Two dimensional displays Uncertainty

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Delay-dependent stability of 2D state-delayed linear systems

Delay-dependent stability of 2D state-delayed linear systems

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： W. Paszke J. Lam K. Galkowski Shengyuan Xu E. Rogers A. Kummert Institute of Control and Computation Engineering University of Zielona Góra Zielona Gora Poland Department of Mechanical Engineering University of Hong Kong Hong Kong China Department of Automation Nanjing University of Science and Technology of PLA Nanjing China Faculty of Electrical Information and Media Engineering University of Wuppertal Wuppertal Germany School of Electronics and Computer Science University of Southampton Southampton UK

This paper addresses the problem of stability for two-dimensional systems with delays in the state. To solve this problem, the Lyapunov second method is used. The resulting condition is written in terms of linear matrix inequalities and it is dependent on the size of delays. This fact allows us to reduce the conservatism in the stability analysis of two-dimensional systems with state delays. A simulation example is given to illustrate the theoretical developments

关键词： Stability Linear systems Delay systems Symmetric matrices control systems Linear matrix inequalities Delay lines Automatic control control engineering computing Mechanical engineering

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