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Quasi-direct pole placement for time delay systems applied to a heat transfer set-up

IFAC Proceedings Volumes 2009年第14期42卷 325-330页

作者： Tomáš Vyhlídal Wim Michiels Pavel Zítek Center for Applied Cybernetics Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technicka 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium

A method for quasi-direct pole placement is presented for a class of retarded time delay systems with a single control input. The pole placement is done in two steps. First, a number of dominant poles, smaller than the number of controller parameters, are directly assigned. This leads to constraints on the controller parameters. By using the singular value decomposition a simple parameterization of all controllers satisfying these constraints is obtained. In the second step, the remaining degrees of freedom in the parameter space are used to shift the remaining part of the system spectrum as far to the left as possible. It is done using an optimization procedure for nonsmooth, nonconvex functions. An extensive real-plant example is presented to demonstrate the application of the novel pole placement procedure.

关键词： Retarded system pole placement singular value decomposition nonsmooth optimization

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IEEE Transactions on Haptics: Editorial

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IEEE Transactions on Haptics 2008年第1期1卷 2-8页

作者： Edward Colgate, J. Lederman, Susan Prattichizzo, Domenico Barbagli, Federico Basdogan, Cagatay Buss, Martin Ernst, Marc Frisoli, Antonio Gillespie, Brent Grant, Danny Harders, Matthias Hayward, Vincent Jones, Lynette Kajimoto, Hiroyuki Kappers, Astrid Kheddar, Abderrahmane Lin, Ming C. MacLean, Karon Miller, Brian Noma, Haruo Okamura, Allison M. O'Malley, Mareia Ryu, Jeha Tan, Hong Z. Yokokohji, Yasuyoshi Department of Psychology School of Computing Queen's University Canada IEEE Robotics and Automation Society Tübingen Germany Stanford University's Computer Science Department Tübingen Germany Institute of Automatic Control Engineering Technische Universität München Germany Independent Research Group Multisensory Perception and Action Max Planck Institute for Biological Cybernetics Tübingen Germany Department of Applied Mechanics SSSA Japan Research Division Virtual Reality and Telerobotic Systems PERCRO Laboratory Japan Department of Mechanical Engineering Japan Department of Robotics McGill University Canada Computer Vision Lab ETH Zurich Japan Virtual Reality in Medicine Group Japan IEEE CS/RAS Technical Committee on Haptics Japan Department of Electrical and Computer Engineering McGill University Canada Department of Mechanical Engineering MIT Japan University of Electro-Communications Japan Department of Physics and Astronomy Utrecht University Netherlands University of Evry France Chapel Hill United States Department of Computer Science University of British Columbia Canada ATR Knowledge Science Lab United Kingdom Department of Mechanical Engineering Denmark Johns Hopkins University United States Laboratory for Computational Sensing and Robotics United Kingdom Engineering Research Center for Computer-Integrated Surgical Systems and Technology United States Mechanical Engineering and Materials Science Department Rice University United States Korea Republic of Department of Electrical and Computer Engineering Mechanical Engineering and Psychological Sciences Purdue University United States Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Japan

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Robust stability and H-infinity control for uncertain discrete-time Markovian jump singular systems

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控制理论与应用（英文版） 2008年第2期6卷 133-140页

作者： Shuping MA Chenghui ZHANG Xinzhi LIU School of Mathematics and System Science Shandong University Jinan Shandong 250100 China School of Computer Science and Technology Shandong University Jinan Shandong 250061 China School of Control and Engineering Shandong University Jinan Shandong 250061 China Department of Applied Mathematics University of Waterloo Waterloo Ontario N2L 3G1 Canada

The robust stability and stabilization, and H-infinity control problems for discrete-time Markovian jump singular systems with parameter uncertainties are discussed. Based on the restricted system equivalent （r.s.e.） transformation and by introducing new state vectors, the singular system is transformed into a discrete-time Markovian jump standard linear system, and the linear matrix inequality （LMI） conditions for the discrete-time Markovian jump singular systems to be regular, causal, stochastically stable, and stochastically stable with 7- disturbance attenuation are obtained, respectively. With these conditions, the robust state feedback stochastic stabilization problem and H-infinity control problem are solved, and the LMI conditions are obtained. A numerical example illustrates the effectiveness of the method given in the oaoer.

关键词： Discrete-time singular system Markovian jump system Robust stability and stabilization H-infinitycontrol Linear matrix inequality（LMI）

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Smartphone, PDA and mobile embedded device clients of biotelemetric system for monitoring of life functions

Smartphone, PDA and mobile embedded device clients of biotel...

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International Conference on Innovations in Information Technology

作者： Ondrej Krejcar Jindrich Cernohorsky Petr Fojcik Dalibor Janckulik Jan Martinovic Centre for Applied Cybernetics Faculty of Electrical Engineering and Computer Science Department of Measurement and Control Technical University of Ostrava Ostrava Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering and Computer Science Department of Computer Science Technical University of Ostrava Ostrava Czech Republic

Existence of software platform, which will allow us to monitor the patients' bio-parameters and provide us with services which help with full health care, is more than relevant these days. The aim of our project is to provide solution which can be used in different spheres of health care and which will be available through PDA (Personal Digital Assistant), web or desktop clients. Practically developing system works with an ECG sensor connected to mobile equipment, such as PDA/Embedded, based on Microsoft Windows Mobile operating system. The whole system is based on the architecture of .NET Compact Framework, and SQL Server. The project was tested in real environment in cryogenic room (-136degC).

关键词： Personal digital assistants Patient monitoring Data visualization Medical services Hospitals Biomedical monitoring computerized monitoring computer science control systems Electrocardiography

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Task jitter measurement under RTLinux and RTX operating systems, comparison of RTLinux and RTX operating environments

Task jitter measurement under RTLinux and RTX operating syst...

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International Multiconference on computer Science and Information Technology, IMCSIT

作者： Pavel Moryc Jindrich Cernohorsky Faculty of Electrical Engineering and Computer Science Department of Measurement and Control Centre for Applied Cybernetics Technical University of Ostrava Ostrava Czech Republic

This paper compares task jitter measurement performed under RTLinux and RTX hard real-time operating systems. Both the operating environments represent hardware abstraction layer extensions to general-purpose operating systems, and make possible to create a real-time system according to the POSIX 1003.13 PSE 54 profile (multipurpose system). The paper is focused on discussion of experimental results, obtained on PC hardware, and their interpretation.

关键词： Jitter Operating systems

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Constrained optimal control theory for differential linear repetitive processes

Constrained optimal control theory for differential linear r...

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IEEE Conference on Decision and control

作者： Michael Dymkov Eric Rogers Siarhei Dymkou Krzysztof Galkowski Belarus State Economic University Minsk Belarus School of Electronics and Computer Science University of Southampton Southampton UK Department of Applied Mathematics II Friedrich-Alexander-University of Erlangen-Nuremberg Erlangen Germany Institute of Control and Computation Engineering University of Zielona Góra Zielona Gora Poland

ISBN: (纸本)9781424431236

Differential repetitive processes are a distinct class of continuous-discrete two-dimensional linear systems of both systems theoretic and applications interest. These processes complete a series of sweeps termed passes through a set of dynamics defined over a finite duration known as the pass length, and once the end is reached the process is reset to its starting position before the next pass begins. Moreover the output or pass profile produced on each pass explicitly contributes to the dynamics of the next one. Applications areas include iterative learning control and iterative solution algorithms, for classes of dynamic nonlinear optimal control problems based on the maximum principle, and the modeling of numerous industrial processes such as metal rolling, longwall cutting, etc. In this paper we develop substantial new results on optimal control of these processes in the presence of constraints where the cost function and constraints are motivated by practical application of iterative learning control to robotic manipulators and other electromechanical systems. The analysis is based on generalizing the well-known maximum and ¿-maximum principles to them.

关键词： Constraint theory Optimal control Linear systems Iterative algorithms Electrical equipment industry Industrial control Metals industry Cost function Robot control control systems

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Predictive Direct Torque control for Induction Motor Drive

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AIP Conference Proceedings 2008年第1期1019卷 181-185页

作者： A. Benzaioua M. Ouhrouche A. Merabet aElectric Machines Identification and Control Laboratory (EMICLab) Department of Applied Sciences University of Quebec at Chicoutimi 555 Blvd de l'Université G7H 2B1 Chicoutimi (Qc) Canada bDalhousie University Department of Electrical & Computer Engineering 1360 Barrington Street B3J 2X4 Halifax (NS) Canada

A predictive control combined with the direct torque control (DTC) to induction motor drive is presented. A new switching strategy is used in DTC, where the constant switching frequency is taken constant, and the speed tracking is done by a predictive controller. The scheme control is applied to induction motor drive in order to perform the dynamic responses of electromagnetic torque, stator flux and speed. A comparison between the PI controller and predictive controller for speed tracking is done. Results of simulation show that the performance of the proposed control scheme for induction motor drive is accurately achieved.

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Modeling and control of PMSM drive using MRAC with signal adaptation algorithm

Modeling and control of PMSM drive using MRAC with signal ad...

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MIPRO 2007 - 30th Jubilee International Convention: computers in Technical Systems and Intelligent Systems

作者： Horvatic, Miroslav Ban, Zeljko Bjazic, Toni University of Applied Sciences J. Krizanica b.b. 42000 Varazdin Croatia Department of Control and Computer Engineering University of Zagreb Unska 3 HR-10000 Zagreb Croatia

ISBN: (纸本)9789532330304

The paper deals with modeling and control of the permanent magnet synchronous motor (PMSM) drive. The mathematical model of the drive with basic PI control loops is obtained from experimental data by parameter optimization. The model reference adaptive control (MRAC) algorithm with signal adaptation is adjusted for control of the drive in presence of the measuring noise. Algorithm parameters are obtained by computer optimization. Behavior of the control system is tested by computer simulation. © 2007 by MIPRO.

关键词： Permanent magnets

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On the Use of Fuzzy Texture Spectrum for Homogeneous and Textured Images Discrimination

On the Use of Fuzzy Texture Spectrum for Homogeneous and Tex...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Miquel Grau-Sanchez Eduard Montseny Pilar Sobrevilla Department of Applied Mathematics II Technical University of Catalonia Barcelona Spain Department of Computer Engineering and Automatic Control Technical University of Catalonia Barcelona Spain Eduard Montseny is with the Department of Computer Engineering and Automatic Control Technical University of Catalonia Barcelona Spain Department of Applied Mathematics II Technical University of Catalonia Barcelona Spain

Identifying the perceived qualities and properties of texture in images is an important step for image analysis, however the vague definition of texture has led to a huge variety of ways to analyze and characterize texture. In the ninetieths He and Wang (1990) proposed the use of the texture spectrum for extracting texture features. Recently we have developed a fuzzy-based texture spectrum coding approach, the fuzzy texture spectrum coding (Barcelo et al., 2006), in which a texture image could be described by the occurrence frequency function of all its fuzzy texture feature vectors. Later on, in the work of Barcelo et al. (2006), we proved the robustness of the proposed approach, particularly for representing homogeneity features. As an extension of our previous study on the analysis of the fuzzy texture spectrum coding for extracting texture features, in this paper we present the first results of our ongoing work for obtaining the classes encoded by the Reduced Fuzzy Texture Spectrum allowing to determine images' texture characteristics as well as the degrees to which these classes determine image's texture and homogeneity.

关键词： Image texture analysis Image analysis Image coding Feature extraction Image texture Helium Surface texture Statistics Image segmentation Frequency

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Computational issues of signal analysis in time domain

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WSEAS Transactions on computers 2007年第1期6卷 1-8页

作者： Hlupić, Nikica Basch, Danko Fertalj, Krešimir Department of Applied Computing University of Zagreb Faculty of Electrical Engineering and Computing Unska 3 Zagreb 10000 Croatia Department of Control and Computer Engineering University of Zagreb Faculty of Electrical Engineering and Computing Unska 3 Zagreb 10000 Croatia

This paper elaborates the present stage predictable direction of future development of Sine Wave Calculator (SWC), a simple method for signal analysis in time domain that provides accuracy comparable to the best classical methods (relative errors about few times 10-6). The main SWC advantages are extreme simplicity, possibility of selection of samples and straightforward calculations, which makes it preferable solution for quick implementation. The main shortage is still unknown mathematical analysis of errors, which are probably unequal for different signal parameters.

关键词： Spectrum analysis

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