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IEEE Winter Meeting Power engineering Society

作者： S. Chingyei Chung S.R. Huang Jen-So Huang S.Y. Chaio Dept. of Autom. Control Eng. Feng Chia Univ. Taichung Taiwan Department of Automatic Control Engineering Feng Chia University FCU Taichung Taiwan

Conventionally, passive filter design is very important to many power electronic circuits and power systems. For the design of these power electronic circuits and power systems, how to obtain accurate corner frequencies becomes a very important issue. It is known that when the load is large, the inductance for an inductor always changes. This is due to the fact that when the current load is high, the inductance always suffers from saturation or hysteresis. Because the inductance is nonlinear, it is very difficult to estimate the actual value for the nonlinear inductance during large current situations. In this paper, the authors explore the saturation phenomenon for a nonlinear inductance. With the describing function method, one can linearize the nonlinear inductor and then estimate the inductance during large current situations. Therefore, the bandwidth for low-pass, high-pass and notch filters can be also calculated very accurately. It can be found by the describing function method that when the current is very large, the corner frequencies or bandwidth frequencies will drift to a larger value in the low-pass filter. The drift value of bandwidth frequencies can be easily calculated by the describing function. This phenomenon can be verified by simulation and experimental results.

关键词： Inductance Frequency Bandwidth Power electronics Circuits Power systems Inductors Low pass filters Passive filters Hysteresis

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Rotating sonar and a differential encoder data fusion for map-based dynamic positioning

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Journal of Intelligent and Robotic Systems: Theory and Applications 2000年第3期29卷 211-232页

作者： Yang, Haeyong Park, Kyucheol Lee, Jang Gyu Chung, Hakyoung Automatic Control Research Center School of Electrical Engineering Seoul National University Seoul 151-742 Korea Republic of Dept. of Contr. and Instrum. Eng. Seoul Natl. University of Technology Seoul 139-743 Korea Republic of

In this paper, a dynamic positioning system using a rotating sonar and a differential encoder is proposed. The method is implemented by employing an indirect feedback Kalman filter. The state equation is written for encoder propagation and its error characteristic. A measurement equation describes a map-based measurement equation based on rotating sonar sensor data. In other words, sonar data compensates for the system and navigation errors of the differential encoder. The positioning system calculates the position and headings of a mobile robot. The real-time calculation is performed by a map-based measurement update utilizing wide-angle beam characteristics of the sonar sensor and the Kalman filter. In addition, an observability analysis for the positioning system is performed. Experimental results show that the proposed hybrid positioning system successfully provides accurate position and headings in real-time. The position and heading errors arc bounded within few centimeters and within few degrees, respectively.

关键词： Robotics

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General probabilistic formulation for supervised neural classifiers

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Journal of VLSI Signal Processing Systems for Signal, Image, and Video Technology 2000年第1期26卷 141-153页

作者： Ni, Hongmei Adali, Tülay Wang, Bo Liu, Xiao Dept. of Comp. Sci. and Elec. Eng. Univ. of Maryland Baltimore County Baltimore MD 21250 United States GlobeSpan Semiconductor Inc. 100 Schulz Drive Red Bank NJ 07701 United States Natl. Univ. of Defense Technology Changsha China Univ. of Sci. and Technol. of China Hefei China Dept. of Comp. Sci. and Elec. Eng. Univ. of Maryland Baltimore County Baltimore MD United States Middle East Technical University Ankara Turkey North Carolina State University Raleigh NC United States Dept. of Electrical Engineering Univ. of Maryland Baltimore County Baltimore MD United States Suzhou University Suzhou China Southeast University Nanjing China Shandong University Jinan China Flight Control Laboratory Department of Automatic Control Nanjing Univ. Aero. and Astronaut. Nanjing China GlobeSpan Inc. Red Bank NJ United States

We use partial likelihood (PL) theory to introduce a general probabilistic framework for the design and analysis of neural classifiers. The formulation allows for the training samples used in the design to have correlations in time, and for use of a wide range of neural network probability models including recurrent structures. We use PL theory to establish a fundamental information-theoretic connection, show the equivalence of likelihood maximization and relative entropy minimization, without making the common assumptions of independent training samples and true distribution information. We use this result to construct the information geometry of partial likelihood and derive the information geometric e- and m-projection (em) algorithm for class conditional density modeling by finite normal mixtures. We demonstrate the successful application of the algorithm by a channel equalization example and give simulation results to show the efficiency of the scheme.

关键词： Correlation theory

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Potential of Fraser-Hipel-Kilgur Technique and Game Theory for Balkan conflicts: Pt. 1 Modelling Theory

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IFAC Proceedings Volumes 2000年第8期33卷 49-57页

作者： Yuanwei Jing Georgi M. Dimirovski Dept. of Automatic Contr. & Contr. Eng. at School of Information Science & Engineering Noretheastern University Shenyang Liaoning P.R. of China Department of ASE at Faculty of Electr. Eng. SS. Cyril and Methodius University P.o. Box 574 MK-91000 Skopje Republic of Macednia Fax. # +389-91-36-42-62 Dept. of Automatic Control and Electrical Drives Johannes Kepler University Altengergerstr. 69 A-4040 Linz Austria Fax.# +43-732-2468-9734

In this paper, the potential applications of Fraser-Hipel-Kilgur methodology for conflict modelling and resolution, based on the theory of non-cooperative games theory, to the modelling analysis of Balkan conflicts is exploerd through the case study on the conflicting interests over R. Macedonia by the end of the twentieth century. Particular attention was devoted to the use of its advanced variant based on theory of digraphs and adjacent reachability matrices. The graph form takes game outcomes rather than individual decisions as the basic units for modelling conflicts, described in sufficient detail. A number of solution concepts can be formulated and employed for both two-player and multi-player games, the latter being of primary interst in here. The taxonomy of graph based solution concepts of the original methodology has been employed to account for certain anticipation horizon by each of the players. This methodology makes essential use of the fundamental axioms of game theory defined by posulates of the individual rationality, the players inertia, the limited-move stability, and the minimum effect for the opponents.

关键词： system analysis game theory graph theory graph models conflict analysis conflict of interests

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Modelling and Identification with Rational Orthogonal Basis Functions

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IFAC Proceedings Volumes 2000年第15期33卷 445-455页

作者： Paul Van den Hof Bo Wahlberg Peter Heuberger Brett Ninness Jozsef Bokor Tomás Oliveira e Silva Department of Applied Physics Delft University of Technology Lorentzweg 1 2628 CJ Delft The Netherlands S3 - Automatic Control Royal Institute of Technology S-100 44 Stockholm Sweden. Department of Electrical and Computer Engineering The University of Newcastle Callaghan NSW 2308 Australia. Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1502 Budapest Hungary Dept. Electrónica e Telecommunicações University of Aveiro 3810-183 Aveiro Portugal

Decomposing dynamical systems in terms of orthogonal expansions enables the modelling/approximation of a system with a finite length expansion. By flexibly tuning the basis functions to underlying system characteristics, the rate of convergence of these expansions can be drastically increased, leading to highly accurate models (small bias) being represented by few parameters (small variance). Additionally algorithmic and numerical aspects are favourable. A recently developed general theory for basis construction will be presented, that is a generalization of the classical Laguerre theory. The basis functions are applied in problems of identification, approximation, realization, uncertainty modelling, and adaptive filtering, particularly exploiting the property that basis function models are linearly parametrized. Besides powerful algorithms, they also provide useful analysis tools for understanding the underlying identification/approximation algorithms.

关键词： System identification orthogonal basis functions series expansions model reduction parametrization

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Guaranteed Quadratic Stabilization of Certain Time-Varying Large-Scale Delay Ito Stochastic Systems

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Journal of Systems engineering and Electronics 2000年第3期11卷 35-3页

作者： Jin Yansheng & Xu Yumin (dept. of Mathematics and Physics Yanshan University Qinhuangdao 066004 P. R. China) Deng Feiqi (dept. of automatic control engineering South China University of Technology Guangzhou 510641 P. R. China) Dept. of Mathematics and Physics， Yanshan University， Qinhuangdao 066004， P. R. China Dept. of Automatic Control Engineering， South China University of Technology，Guangzhou 510641， P. R. China

In this paper, we investigate the decentralized stabilization of some time-varying uncertain large-scale stochastic systems with delays under matching conditions. A type of decentralized controllers with guaranteed st... 详细信息

关键词： Stochastic systems Uncertainty Stabilization

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Application of a genetic algorithm in triangulation of a 3-D object surface

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International Journal of Computers and Applications 2000年第2期22卷 73-77页

作者： Zhenyu, Chen Mbede, J.B. Yan, Zhou Dehua, Li Hanping, Hu State Commn. Res. Open Lab. Image P. Inst. Pattern Recog. Artif. Intell. Huazhong Univ. of Sci. and Technol. 430074 Wuhan China Intelligent Contr. and Robotics Lab. Dept. of Contr. Sci. and Engineering Huazhong Univ. of Sci. and Technol. 430074 Wuhan China Second Artillery Institute Huazhong Univ. of Sci. and Technol. Inst. Pattern Recog. Artif. Intell. Huazhong Univ. of Sci. and Technol. Second Artillery Institute China Wuhan University China Artificial Intelligence Department University of Edinburgh Inst. of AI and Pattern Recognition Huazhong Univ. of Sci. and Technol. China Cogn. Sci. Natl. Key Found. Res. P. Douala University Cameroon Tübingen University Germany Automatic Control Laboratory Darmstadt University Department of Service Cameroon Min. of National Education Robotics Laboratory Huazhong Univ. of Sci. and Technol. Wuhan China Assoc. Connectionnistes These-ACTH Rennes France IEEE Soc. of Robotics and Automation IEEE Society of Control Systems IASTED Assoc. Jeunes Chercheurs Robotique France Navy University of Engineering China Huazhong Univ. of Sci. and Technol. China Department of Computer Science Airforce Radar Acad. of Engineering China Inst. of P.R and AI Huazhong Univ. of Sci. and Technol.

This paper proposes a genetic-based algorithm for surface reconstruction of three-dimension (3-D) objects from a group of contours representing its section plane lines. The algorithm can optimize the triangulation of the surface of 3-D objects with a multi-objective optimization function to meet the needs of a wide range of applications. Further, a new crossover operator for triangulation and a new 3-D quadrilateral mutation operator are also introduced.

关键词： Object recognition

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Three statistical batch algorithms for tracking manoeuvring targets

Three statistical batch algorithms for tracking manoeuvring ...

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1999 European control Conference, ECC 1999

作者： Bergman, N. Gustafsson, F. Diviston of Automatic Control Dept. of Electrical Engineering Linköping University LinköpingSE-58183 Sweden

ISBN: (纸本)9783952417355

The EM algorithm and two MCMC algorithms are applied to manoeuvre detection in target tracking. These statistical methods are off-line and the intended use is to compute upper performance limits of on-line algorithms as well as for off-line analysis. A consequence of the MCMC theory is that an approximation of the a posteriori distribution for the manoeuvre times is obtained. © 1999 EUCA.

关键词： Target tracking

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Comments on `Some robustness measures for a class of discrete-time systems'

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IMA Journal of Mathematical control and Information 1999年第4期16卷 309-313页

作者： Halická, Margaréta Rosinová, Danica Institute of Applied Mathematics Faculty of Mathematics and Physics Comenius University 842 15 Bratislava Slovakia Dept. of Automatic Control Systems Faculty of Electrical Engineering Slovac Technical University 812 19 Bratislava Slovakia

The incorrectness of several results concerning robustness measures introduced by M. S. Mahmoud in the paper `Some robustness measures for a class of discrete-time systems' is discussed. Some confusing issues are ... 详细信息

关键词： Discrete time control systems

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Plant-friendly identification of second-order Volterra models

Plant-friendly identification of second-order Volterra model...

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1999 European control Conference, ECC 1999

作者： Doyle, F.J. Parker, R.S. Pearson, R.K. Ogunnaike, B.A. Dept. of Chemical Engineering University of Delaware United States ETH-Zurich Institute for Automatic Control Switzerland DuPont Company WilmingtonDE United States

ISBN: (纸本)9783952417355

The primary focus of this paper is the identification of second-order Volterra models using input sequences that offer the following three advantages: (i) the are 'plant friendly;' (ii) they simplify the required computations;and (iii) they can emphasize certain model parameters over others. To provide a quantitative basis for discussing the first of these advantages, this paper defines a friendliness index f that relates to the number of changes that occur in the sequence. © 1999 EUCA.

关键词： Process control

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