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IEEE International Symposium on Intelligent control (ISIC)

作者： S. Poyhonen M. Negrea A. Arkkio H. Hyotyniemi H. Koivo Control Engineering Laboratory Department of Automation and Systems Technology Helsinki University of Technology Finland Laboratory of Electromechanics Department of Electrical Engineering Helsinki University of Technology Finland

Support vector machine (SVM) based classification is applied to fault diagnostics of an electrical machine. Numerical magnetic field analysis is used to provide virtual measurement data from healthy and faulty operations of an electric machine. Power spectra estimates of a stator line current of the motor are calculated with Welch's method, and SVMs are applied to distinguish the healthy spectrum from faulty spectra. Multiple SVMs are combined with a majority voting approach to reconstruct the final classification decision.

关键词： Support vector machines Support vector machine classification Magnetic field measurement Stators Voting Neural networks Laboratories Magnetic analysis Condition monitoring Statistical learning

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controller performance assessment and monitoring - theory and its applications

Controller performance assessment and monitoring - theory an...

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World Congress on Intelligent control and automation (WCICA)

作者： Maying Yang Xiaoming Jin Automation Department Information engineering College Zhejiang University of Technology Hangzhou China Institute of Advanced Process Control University of Zhejiang Hangzhou China

controller performance assessment is a challenging task in industrial process control. In this work, we review the state of research in controller performance assessment and monitoring, and present some commercial implementations of the technology in process industries. Challenges related to the controller performance evaluation are outlined for research and applications.

关键词： Automatic control automation process control Educational institutions Industrial control Computerized monitoring Intelligent control

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OPTIMAL FUZZY control TO OPTIMISE ENERGY CONSUMPTION IN DISTILLATION COLUMNS

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IFAC Proceedings Volumes 2002年第1期35卷 307-312页

作者： A. Khelassi C. Bouyahiaoui A. Maidi A. Benhalla M. Djellal Laboratory of Automatic Applied (Process Control) Automatic Department Faculty of Hydrocarbons and Chemistry University of Boumerdes 35000 Algeria Electrical and Data Processing Engineering Department Polytechnics School of Montreal Quebec Canada

Distillation columns constitute a significant fraction of the capital invested in the refineries around the world; their control requires a major part of the total operating cost of chemical processes, if the used strategy is not adequate. This article presents the application of optimal fuzzy control to reduce the energy consumption of a Benzene-Toluene distillation column. This method is based on the determination of the specific values of the fuzzy controller parameters such that certain performance criterion is minimised. Results of a simulation study are presented showing the potential improvement offered by this method.

关键词： Optimal fuzzy controller multivariable systems distillation column Pontryagin minimum principle energy consumption

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MILESTONE REPORT COORDINATING COMMITTEE ON COMPUTER control

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IFAC Proceedings Volumes 2002年第1期35卷 217-225页

作者： Henk B. Verbruggen Jaehyun Park Wolfgang Halang George Irwin Janusz Zalewski Faculty of Information Technology and systems Delft University of Technology Delft the Netherlands Department of Automation Engineering Inha University Inchon Korea Faculty of Electrical Engineering Fern Universität Hagen Germany Intelligent Control and Systems Group School of Electrical and Electronic Engineering Queen's University Belfast UK Department of Electrical and Computing Engineering University of Central Florida Orlando USA

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Jerk limited time optimal control of multi-input systems

Jerk limited time optimal control of multi-input systems

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American control Conference (ACC)

作者： M. Muenchhof T. Singh Department of Mechanical and Aerospace Engineering SUNY at Buffalo Buffalo NY USA Institute of Automatic Control Laboratory of Control Systems and Process Automation University of Technology Darmstadt Darmstadt Germany

A design method for determining control sequences for rest-to-rest maneuvers of flexible structures with multiple actuators and multiple resonant modes is described. The problem formulation. is based on a pole cancellation approach with constraints on both the magnitude and the time rate of change of the control inputs. Time-optimality can be traded for an increased level of robustness with respect to modeling errors. Robustification is achieved by placing additional zeros of the controller on some or all of the resonant poles of the system.

关键词： Optimal control control systems Actuators Automatic control Resonance Sampling methods Aerospace engineering Design methodology Flexible structures Robustness

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Using multiple orientational filters of steerable pyramid for image registration

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Information Fusion 2002年第3期3卷 203-214页

作者： Liu, Zheng Khing Ho, Yeong Tsukada, Kazuhiko Hanasaki, Koichi Dai, Yaping Li, Lingqi Control and Instrumentation Division School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore Nanyang Avenue Singapore Department of Earth Resources Engineering Graduate School of Engineering Kyoto University 6068501 Kyoto Japan Department of Automation Beijing Institute of Technology Beijing 100081 China Institute for Aerospace Research National Research Council of Canada Building M-14 Ottawa Ont. K1K 2K5 Montreal Road 1191 Canada

Images acquired by different methodologies are fused to achieve more accurate information and a comprehensive understanding about the objects. With an increasing number of sensors involved, the signal acquisition and analysis system will benefit from the technique named sensor fusion or data fusion. Many successful applications have been found in the areas of computer vision, remote sensing, medical diagnosis, non-destructive testing, etc. Before the image fusion operation, a preprocessing, i.e. registration, needs to be performed, which ensures that all pixels are associated with corresponding physical points of the object. In this paper, we present an automatic two-dimensional image registration method by using a so-called steerable pyramid transform. Based on the steerability of the transform, image features along certain orientations can be obtained. Thereafter, an edge detector, such as Sobel, can further extract oriented edge features of the image. A coarse-to-fine procedure is adopted to utilize these features to achieve the registration result. The effectiveness of the proposed method is illustrated by the experimental results. © 2002 Elsevier Science B.V. All rights reserved.

关键词： Feature extraction Image fusion Image registration Steerable pyramid

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FUZZY IDENTIFICATION OF BIOprocessES APPLYING TSK-TYPE MODELS WITH CONSEQUENT PARAMETER ESTIMATION THROUGH ORTHOGONAL ESTIMATOR

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IFAC Proceedings Volumes 2002年第1期35卷 283-288页

作者： Rosimeire Aparecida Jerônimo Claudio Garcia Oscar A.Z. Sotomayor Department of Telecommunications and Control Engineering Laboratory of Automation and Control (LAC) Department of Chemical Engineering Laboratory of Simulation and Process Control (LSCP) Polytechnic School of the University of São Paulo Av. Prof. Luciano Gualberto Trav. 3 n. 158 Cidade Universitária CEP 05508-900 São Paulo - SP Brazil

This paper presents fuzzy identification of two bioprocesses employing TSK-type models. A “Modified Gram-Schmidt” (MGS) orthogonal estimator is used to estimate the consequent parameters. This approach is then applied to identify two distinct cases involving dissolved oxygen concentration: one related to a bioreactor and the other one related to an activated sludge process. The obtained models are then cross-validated.

关键词： System identification Bioprocesses Nonlinear models Fuzzy modeling TSK-type models Modified Gram-Schmidt algorithm Parameter estimation

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Development and implementation of a hybrid intelligent controller for interior permanent magnet synchronous motor drive

Development and implementation of a hybrid intelligent contr...

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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： M.N. Uddin M.A. Abido M.A. Rahman Modeling Automation and Control Engineering Laboratoryoratory Modeling Automation and Control Engineering Laboratory Lakehead University Thunder Bay ONT Canada Electrical Engineering Department King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia Faculty of Engineering. & Appl. Science Memorial University of Newfoundland NEW Canada

A hybrid neuro-fuzzy scheme for the online tuning of a genetic based proportional-integral (PI) controller for interior permanent magnet synchronous motor (IPMSM) drives is presented in this paper. The proposed controller is developed for accurate speed control of the IPMSM drive under various system disturbances. In this work, initially different operating conditions are obtained based on motor dynamics incorporating uncertainties. At each operating condition, a genetic algorithm (GA) is used to optimize the PI controller parameters in a closed loop vector control scheme. In the optimization procedure, a performance index is developed to reflect the minimum speed deviation, minimum settling time and zero steady-state error. A fuzzy basis function network (FBFN) is utilized for online tuning of the PI controller parameters to ensure optimum drive performance under different disturbances. The proposed FBFN based PI controller provides a natural framework for combining numerical and linguistic information in a uniform fashion. The proposed controller is successfully implemented in realtime using a digital signal processor board DS 1102 for a laboratory 1 hp IPMSM. The efficacy of the proposed controller is verified by simulation as well as experimental results at different dynamic operating conditions. The proposed controller is found to be robust for applications In IPMSM drive.

关键词： Permanent magnet motors Drives Pi control Proportional control control systems Velocity control Synchronous motors Uncertainty Genetic algorithms Machine vector control

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On complex non-linear systems with symmetries: controllability preserving decomposition

On complex non-linear systems with symmetries: controllabili...

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IEEE International Conference on Electronics, Circuits and Systems (ICECS)

作者： G.M. Dimirovski Y.-W. Jing J. Zhao T.D. Kolemisevska-Gugulovska Institute of Automation & Systems Engineering Faculty of Electrical Engineering Ss Cyril and Methodius University Skopje Macedonia Department of Computer Engineering Faculty of Engineering Dogus University Istanbul Turkey Institute of Control Science School of Information Science & Engineering Northeastern University Shenyang Liaoning China Institute of Automation & Systems Engineering Faculty of Electrical Engineering Ss Cyril and Methodius University Skopje Macedonia

In this paper, the problems of isomorphic decomposition and controllability of a class of nonlinear systems possessing symmetries, on the basis of quotient systems, is studied. The isomorphic decomposition formations of these systems are derived. Finally, it is shown that controllability of the original systems can be determined by that of the subsystems, which are obtained through isomorphic decomposition. The corresponding sufficient and necessary conditions are given. Two new theoretical results have been proved.

关键词： controllability Nonlinear control systems control systems Nonlinear systems Automatic control Information science automation Systems engineering and theory Feedback Mathematical model

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Colored Petri net control of OR-logic

Colored Petri net control of OR-logic

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IEEE International Symposium on Intelligent control (ISIC)

作者： Weimin Wu Hongye Su Jian Chu W.M. Wonham National Laboratory of Industrial Control Technology & Institute of Advanced Process Control University of Zhejiang Hangzhou China Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

Usually, the maximally permissive control of Petri nets with an OR-logic constraint is difficult to implement. In this paper, OR-logic is easily enforced using a colored Petri net. A colored Petri net place, named colored monitor place, is designed to monitor the states of constraints. A so-called guard function of colored Petri nets that maps certain transitions into a Boolean expression is suitably defined on the colored sets. The maximally permissive control is then obtained via the guard function. In addition, a constraint transformation method for marked graphs with uncontrollable transitions is proposed.

关键词： Petri nets Vectors control systems Laboratories Industrial control process control Computerized monitoring Logic Glass Force control

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