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19th International Workshop on Robotics in Alpe-Adria-Danube Region, RAAD 2010

作者： Gróf, Patricia Baranyi, Péter Korondi, Péter Computer and Automation Research Institute Cognitive Informatics Research Group Hungary Budapest University of Technology and Economics Dept. of Telecommunications and Media Informatics Hungary Budapest University of Technology and Economics Dept. of Mechatronics Optics and Engineering Informatics Hungary

ISBN: (纸本)9781424468867

This paper deals with the topic of qLPV statespace model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the convex hull of the polytopic model influences the control performance of the LMI based control design. We examine these influences through the controller and observer design of the two dimensional aeroelastic wing's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models change the control performance. © 2010 IEEE.

关键词： Computational geometry

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Determination of the stability parameter space of a two dimensional aeroelastic system, a TP model-based approach

Determination of the stability parameter space of a two dime...

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14th International Conference on Intelligent engineering Systems, INES 2010

作者： Gróf, Patricia Baranyi, Péter Korondi, Péter Cognitive Informatics Research Group Computer and Automation Research Institute Hungary Dept. of Telecommunications and Media Informatics Budapest University of Technology and Economics Hungary Dept. of Mechatronics Optics and Engineering Informatics Budapest University of Technology and Economics Hungary

ISBN: (纸本)9781424476527

This paper falls in the topic of qLPV state-space model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the convex hull of the polytopic model influences the feasibility of the LMI based control design and the resulting control performances. We examine these influences through the control design of the two dimensional aeroelastic system's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models lead to different control performances. © 2010 IEEE.

关键词： State space methods

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Computing reaction kinetic realizations of positive nonlinear systems using mixed integer programming

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IFAC Proceedings Volumes 2010年第14期43卷 981-986页

作者： Gábor Szederkényi Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute (MTA-SZTAKI) Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

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).

关键词： nonlinear systems positive systems chemical reaction networks mixed integer optimization

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THD reduction with grid synchronized inverter’s power injection of renewable sources

THD reduction with grid synchronized inverter’s power injec...

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International Symposium on Power Electronics, Electrical Drives, automation and Motion, SPEEDAM

作者： Péter Görbe 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 Budapest Hungary

A control method for small domestic power plants using renewable energy is described in this paper. This method is not only capable of optimizing the working point of the plant but also implements active power factor correction and lowers the extant harmonic distortion in the line. The novel element in the proposed complex controller structure is the upper harmonic controller that minimizes the amplitudes of the 3rd, 5th 7th, 9th, and the 11th upper harmonic component in the output voltage. The proposed controller has been investigated by simulation in Matlab environment, and as a result, substantial improvement of the output voltage and current waveform could be achieved. Robustness of the method against nonlinear loads has also been tested.

关键词： Power factor correction Costs Power generation Voltage control Harmonic distortion Robustness Nonlinear distortion Solar power generation Power supplies Inverters

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Dynamic modeling and model analysis of a large industrial synchronous generator

Dynamic modeling and model analysis of a large industrial sy...

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International Conference on Applied Electronics, AE

作者： Attila Fodor Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprem Hungary Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

A simple dynamic model of an industrial size synchronous generator operating in a nuclear power plant is developed in this paper based on first engineering principles. The constructed state-space model consists of a nonlinear state equation and a bi-linear output equation. It has been shown that the model is locally asymptotically stable with parameters obtained from the literature for a similar generator. The effect of load disturbances on the partially controlled generator has been analyzed by simulation using a traditional PI controller. It has been found that the controlled system is stable and can follow the set-point changes in the effective power well. The disturbance rejection of the controller is also satisfactory.

关键词： Mathematical model Equations Synchronous generators Torque Windings Rotors

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The application of discrete particle swarm optimization in attitude determination

The application of discrete particle swarm optimization in a...

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2010 WASE International Conference on Information engineering, ICIE 2010

作者： Chang, Chuanwen Mao, Wenshen Mao, Na Gu, Jing No.28 Research Institute China Electronics Technology Group Corporation Nanjing 210007 China School of Computer and Information Hefei University of Technology Hefei 230009 China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of Education Hefei 230009 China

ISBN: (纸本)9780769540801

Attitude determination with navigation satellites is a key technology in aviation, marine and land navigation. In the method based on carrier phase difference, the double difference integer ambiguity solving is important and difficult. This paper adopts Discrete Particle Swarm Optimization to search for the optimal integer ambiguity directly without the decorrelation of ambiguity, and calculates the baseline vector consequently. This method can improve the efficiency of integer ambiguity solving, so as to be applied in dynamic attitude determination. The experimental results show the validity of this method. © 2010 IEEE.

关键词： Particle swarm optimization (PSO)

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A new variable tap-length LMS algorithm and application in fixed satellite communications

A new variable tap-length LMS algorithm and application in f...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Hui, Chen Yanguang, Han Haibin, Li Xinping, Guan Xidian University Xian China 54th Research Institute China Electronics Technology Group Corporation Shijiazhuang China Key Lab. of Industrial Computer Control Engineering Hebei Province Yanshan University Qinhuangdao China

ISBN: (纸本)9781424437092

A new variable tap-length LMS algorithm is proposed in this paper. This algorithm can effectively obtain both fast convergence rate and small steady state error by non-linear weighting L errors of the current moment and past moments. The algorithm analysis is also given which the ideal tap-length is obtained by increasing the error information and eliminating the effect of correlated noise sequences. Then the new algorithm is applied to the fixed satellite communications system in which the channel is affected by weather conditions attenuation and multipath effect. Simulation results are presented to support the analysis. The new algorithm converges faster than usual algorithms under same steady state performance. The signal BER performance is greatly improved with the new adaptive filter algorithm equalizer when the signal passes simulation model of fixed satellite communications system. © 2010 IEEE.

关键词： Satellites

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Performance/Robustness Limit Evaluation for Lyapunov-Stable Nonlinear Plants

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IFAC Proceedings Volumes 2010年第10期43卷 202-207页

作者： Cs. Bányász L. Keviczky Computer and Automation Research Institute of the H. Ac. of Sc. Control Engineering Research Group of the H. Ac. of Sc.at the Dept. of Automation and Informatics Budapest Univ. of Technology and Economics H-1111 Budapest Kende u 13-17 HUNGARY

Lyapunov-stable nonlinear plants can be approximated by an LTI model in many cases. If this approximation is obtained then it is possible to construct a G2DOF control system. The paper presents a new approach how the important relationships between the actuator, process and design parameters furthermore robustness measures can be determined. In this decomposition method the optimal control design for two-degree of freedom time delay control systems is discussed. Using a proper CAD algorithm the exact relationships can be plotted and the ultimate robustness limit of any control can be explicitly calculated.

关键词： nonlinear control Lyapunov stability performance analysis robustness limit

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Model-Based Test Signal Generation for Service Diagnosis of Automotive Systems

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IFAC Proceedings Volumes 2010年第7期43卷 117-122页

作者： Michael Ungermann Jan Lunze Dieter Scharzmann Robert Bosch GmbH Corporate Sector Research and Advance Engineering Stuttgart Germany Institute of Automation and Computer Control Ruhr-Universität Bochum Bochum Germany

A main step in service diagnosis is the selection of dedicated tests for a faulty automotive system in order to decide in which component a fault has occurred. This paper develops a test selection approach that is based on structural models of the system. A structure graph represents the physical couplings of the input, state, and output signals. The test selection method aims at finding operating points in which faults distinguish with respect to their physical input-state-output paths through the components and, thus, can be isolated by steering the system into these operating points. The main ideas are illustrated by a spark ignition engine with the faults of a leakage in the intake manifold and damaged intake valves to be distinguished.

关键词： Service diagnosis active diagnosis fault isolation structural model test generation

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Tensor Product Model Transformation Based Friction Compensation of a Mechatronic System

Tensor Product Model Transformation Based Friction Compensat...

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International Conference on Intelligence engineering Systems

作者： Bela Takarics Peter Korondi Peter Baranyi Dept. of Mechatronics Optics and Engineering Informatics Budapest University of Technology and Economics Cognitive Informatics Research Group Computer and Automation Research Institute

ISBN: (纸本)9781424476527

The Tensor Product (TP) model transformation is a recently proposed technique for transforming given Linear Parameter-Varying (LPV) state-space models into polytopic model form, namely, to parameter-varying convex combination of Linear Time Invariant (LTI) systems. The main advantage of the TP model transformation is that it is executable in a straightforward way and the Linear Matrix Inequality (LMI) based control design frameworks can immediately be applied to the resulting polytopic models to yield controllers with tractable and guaranteed performance. The main contribution of this paper is that it represents the friction of a DC servo drive in TP model form, automatically designs LMI based controller for friction compensation. The reference signal compensation is also based on the TP model transformation. The results were simulated for speed control of the DC servo drive and were compared to other control techniques.

关键词： Non-linear system control Friction compensation DC servo drive Simulation

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