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IEEE Conference on control Technology and Applications (CCTA)

作者： P. Zezula J. Jezek M. Sebek Department of Control Engineering FEE Czech Technical University Prague Czech Republic Department of Control Theory Institute of Information Theory and Automation Academy of Sciences슠of the슠Czech Republic Praque Czech Republic Center of Aplied Cybernetics FEE Czech Technical University of Prague Praque Czech Republic

Polynomial methods are an effective method for the synthesis of control systems. The calculation of certain functions with polynomial matrices which are represented by coefficients of polynomials can be time consuming. If, however, the polynomial matrix is represented as a matrix of spectra of polynomials, in many cases it is possible to make significant savings on time and to reduce demands on memory. The time burden of the matrix product above the spectra increases linearly with the degree of the polynomials, whereas for calculations above coefficients of polynomials, it increases quadratically. For the calculation of the spectra, the generally-known and well implemented discrete Fourier transform is used.

关键词： Polynomials Algebra control engineering control system synthesis Interpolation Symmetric matrices Software packages control theory Information theory Automation

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Error compensation on precision machine tool servo control system based on digital concave filter

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Journal of Harbin institute of Technology(New Series) 2001年第4期8卷 389-393页

作者：王立松苏宝库张晶董申 Dept. of Control Theory and Engineering Harbin Institute of Technology Dept. of Computer Science and Engineering Harbin Institute of Technology Dept. of Mechanical Engineering and Automation Harbin Institute of Technology

It is concluded from the results of testing the frequency characteristics of the sub micron precision machine tool servo control system, that the existence of several oscillating modalities is the main factor that affects the performance of the control system. To compensate for this effect,several concave filters are utilized in the system to improve the control accuracy. The feasibility of compensating for several oscillating modalities with a single concave filter is also studied. By applying a modified Butterworth concave filter to the practical system, the maximum stable state output error remains under ±10 nm in the closed loop positioning system.

关键词： precision machine tool concave filter oscillating modality

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Hybrid leader-follower and fuzzy-Petri-net traffic rate control and supervision in network systems

Hybrid leader-follower and fuzzy-Petri-net traffic rate cont...

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5th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service, TELSIKS 2001

作者： Dimirovski, G.M. Jing, Yuanwei Zhang, Siying Dept. of Computer Engineering Faculty of Engineeing DOGUS University Zeamet Sk. 21 TR-81010 Kadikoy-Istanbul Turkey Institute of Automation and Systems Engg. Faculty of Electical Engineering Methodius University MK-1000 Skopje Macedonia Institute of Control Theory School of Information Science and Engineering Northeastern University Shenyang Liaoning 110006 China

ISBN: (纸本)078037228X

This paper addresses networking and traffic control problems in network systems along with the potential for introducing soft-computing applications at supervisory control level. The incentive Stackelberg strategy control concept was introduced to the networking model that comprises subsidiary systems of users and of network. A linear strategy is proposed for the elastic traffic problem, and results are demonstrated and illustrated via Kelly's (1997) example. The presented method is extended to the non-elastic traffic problem and results are also illustrated via a slightly modified Kelly example. Ways of employing combined analytical and soft-computing approaches and techniques in a hybrid framework have been investigated. A fuzzy-Petri-net supervisor is proposed to implement the strategic decision and control layer. Insofar obtained results are rather encouraging, and this research continues further towards possible implementation as well as some open theoretical issues. © 2001 IEEE.

关键词： Game theory

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A new stability condition for second-order linear systems 6

A new stability condition for second-order linear systems

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6th European control Conference, ECC 2001

作者： Duan, G.R. Liu, G.P. Thompson, S. School of Mechanical and Manufacturing Engineering Queen's University of Belfast Stranmillis Road BelfastBT9 5AH United Kingdom School of Mechanical Materials Manufacturing Eng. and Management University of Nottingham University Park NottinghamNG7 2RD United Kingdom Research Office for Control Systems Theory Department of Control Science and Engineering Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9783952417362

Based on the Lyapunov Stability Theorem for linear systems, a very simple sufficient stability condition is derived for second-order linear systems in terms of the positive definiteness of the system coefficient matrices. This condition generalizes some known result and may have important applications in robust stability analysis and robust stabilization of uncertain second-order linear systems. © 2001 EUCA.

关键词： Linear systems

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Robust pole assignment in descriptor linear systems via state feedback 6

Robust pole assignment in descriptor linear systems via stat...

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6th European control Conference, ECC 2001

作者： Duan, G.R. Nichols, N.K. Liu, G.P. School of Mechanical and Manufacturing Engineering Queen's University of Belfast Stranmillis Road BelfastBT9 5AH United Kingdom Department of Mathematics University of Reading ReadingRG6 6AF United Kingdom School of Mechanical Materials Manufacturing Eng. and Management University of Nottingham University Park NottinghamNG7 2RD United Kingdom Research Office for Control Systems Theory Department of Control Engineering and Science Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9783952417362

The problem of eigenvalue assignment with minimum sensitivity in multivariable descriptor linear systems via state feedback is considered. Based on the perturbation theory of generalized eigenvalues of matrix pairs, the sensitivity measures of the closed-loop finite eigenvalues are established in terms of the closed-loop normalized right and left eigenvectors. By combining these measures with a recently proposed general parametric eigenstructure assignment result for descriptor linear systems via state feedback, the robust pole assignment problem is converted into an independent minimization problem. The optimality of the obtained solution to the robust pole assignment problem is totally dependent on the solution to the independent minimization problem. The closed-loop eigenvalues are also taken as a part of the design parameters and are optimized, together with the other degrees of freedom, within certain desired regions on the complex plane. The approach takes numerical stability into consideration and also gives good robustness for the closed-loop regularity. © 2001 EUCA.

关键词： State feedback

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Feature analysis of activated sludge based on microscopic images

Feature analysis of activated sludge based on microscopic im...

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Canadian Conference on Electrical and Computer engineering (CCECE)

作者： M. Sikora B. Smolka Institute for Circuit Theory and Signal Processing Department of Electrical Engineering and Inform. Tech Munich University of Technology Munich Germany Department of Automatic Control Silesian University of Technology Gliwice Poland

ISBN: (纸本)0780367154

Activated sludge is a dense liquid containing large quantities of microorganisms, which are capable of neutralizing most organic pollutants. It is also one of the most important techniques for treating municipal and industrial wastewater. Microscopic analysis of activated sludge can serve as a valuable source of information about its condition. In this paper, we describe image processing techniques used to perform detection of flocks and filamentous bacteria colonies on gray scale microscopic images of activated sludge. Two approaches are demonstrated and compared: separate detection with the use variance and Laplacian of Gaussian operators and joint detection based on a fractal dimension operator. It is demonstrated that the fractal dimension is particularly useful for performing texture-based image segmentation.

关键词： Image analysis Microscopy Microorganisms Fractals Environmentally friendly manufacturing techniques Industrial pollution Wastewater treatment Information analysis Information resources Image processing

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Hybrid leader-follower and fuzzy-Petri-net traffic rate control and supervision in network systems

Hybrid leader-follower and fuzzy-Petri-net traffic rate cont...

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International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： G.M. Dimirovski Yuanwei Jing Siying Zhang Institute of Automation & Systems Engg. Faculty of Electical Engineering SS Cyril and Methodius University Skopje Macedonia Department of Computer Engineering Faculty of Engineeing Dogus University Istanbul Turkey Institute of Control Theory School of Information Science & Engineering Northeastern University Shenyang Liaoning China

关键词： Communication system traffic control control systems Intelligent networks Game theory Telecommunication control Traffic control Routing control system synthesis Supervisory control Pricing

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An evaluation of algorithms for computing the covariance function of a multivariable ARMA process 6

An evaluation of algorithms for computing the covariance fun...

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6th European control Conference, ECC 2001

作者： Soderstrom, Torsten Sebek, Michael Jezek, Jan Kucera, Vladimir Henrion, Didier Department of Systems and Control Information Technology Uppsala University P O Box 27 UppsalaS-751 03 Sweden Center for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Technicka 2 PragueCZ-16627 Czech Republic Institute of Information Theory and Automation Academy of Sciences of the Czech Republic P 0 Box 18 PragueCZ-182 08 Czech Republic Toulouse France

ISBN: (纸本)9783952417362

Computation of an ARMA covariance function is a common ingredient in analysis and synthesis of various problems in stochastic control, estimation and signal processing. In this paper, we present an algorithm based on simple polynomial calculations. Compared to alternative strategies, its computational load increases slowly with the order of the process. Further, it shows good numerical robustness and applies to multivariable ARMA processes, even with complex-valued coefficients. © 2001 EUCA.

关键词： Stochastic systems

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Right coprime factorizations using system upper Hessenberg forms-the multi-input system case

Right coprime factorizations using system upper Hessenberg f...

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IEEE Conference on Decision and control

作者： Guang-Ren Duan School of Mechanical and Manufacturing Engineering Queen''s University Belfast Belfast UK The Research Ofice for Control Systems Theory Department of Control Engineering Harbin Institute of Technology Harbin China

ISBN: (纸本)0780366387

Based on a method for right coprime factorizations of linear systems using matrix elementary transformations, it is shown that a very simple iteration formula exists for right coprime factorizations of multi-input linear systems in system upper Hessenberg forms. This formula gives directly the coefficient matrices of the pair of solutions to the right coprime factorization of the system Hessenberg form, and involves only manipulations of inverses of a few triangular matrices and some matrix productions and summations. Based on this formula, a simple, efficient procedure for determining a right coprime factorization of a multi-input linear system is proposed, which first converts a given linear system into its system Hessenberg form using some orthogonal similarity transformations and then applies the iteration formula to the converted system Hessenberg form. An example demonstrates the usage of the approach.

关键词： Computer aided software engineering Linear systems control systems Robustness Matrix converters Production systems Vectors Manufacturing control engineering Polynomials

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Abstracts of presentations at the 18th Conference of the Entomological Society of Israel - May 18, 2000 - ARO, The Volcani Center, Bet Dagan, Israel

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PHYTOPARASITICA 2001年第1期29卷 51-89页

作者： [Anonymous] Dept. of Cell and Animal Biology The Hebrew University of Jerusalem Jerusalem Israel Dept. of Entomology Israel Dept. of Chemistry The Volcani Center ARO Bet Dagan Integrated Pest Management Fruit Crops Experiment Station Agriculture Company in Upper Galilee Kibbutz Yiron Ministry of Agriculture and Rural Development Extension Service Qiryat Dept. of Stored Products Pheromone Research Lab. ARO The Volcani Center Bet Dagan Israel Div. of Bioresource and Bioenvironmental Sciences Graduate School Kyushu University Fukuoka Japan Mitrani Dept. for Desert Ecology Blaustein Institute for Desert Research Ben-Gurion University of the Negev Sede Boqer Campus Israel Dept. of Chemistry University of Hamburg Germany Dept. of Entomology ARO The Volcani Center Bet Dagan Dept. of Zoology Faculty of Life Science Tel-Aviv University Tel Aviv Israel Plant Protection and Inspection Services Ministry of Agriculture and Rural Development Bet Dagan Israel Carmel Mizrahi Rishon LeZiyyon Ministry of Agriculture and Rural Development Extension Service Rehovot Israel Agricultural Department Agan Chemical Manufacturers Ashdod Israel Dept. of Entomology ARO Gilat Research Station M.P. Negev Israel Entomology Laboratory Ministry of Health Jerusalem Israel Kimron Veterinary Institute Bet Dagan Israel USDA/ARS Gainesville USA Dept. of Stored Products ARO The Volcani Center Bet Dagan Israel Dept. of Plant Protection Southwest Agricultural University Chonqing China Makliteshim Chemical Works Ltd. Be’er Sheva Israel Dept. of Entomology ARO The Volcani Center Bet Dagan Israel Jerusalem Bet Dagan Israel Plant Protection Division Extension Service Ministry of Agriculture and Rural Development 1 ha ’Hamaqim District Bet Dagan Dept. of Plant Science Faculty of Life Science Tel-Aviv University Tel Aviv Israel Dept. of Plant Sciences Tel-Aviv University Tel Aviv Vitality Biotechnologies (Israel) Ltd. Carmel Industrial Park Tirat HaCarmel Israel Max-Planck-Institut Cologne

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