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IEEE Region 10 International Conference TENCON

作者： D. Nualhong S. Chusanapiputt S. Phomvuttisarn T. Saengsuwan S. Jantarang Electrical Engineering Department Electrical and Control System Engineering Division Electricity Generating Authority of Thailand Bangkok Thailand Department of Electrical Power Engineering Faculty of Engineering Mahanakorn University Bangkok Thailand Center of Excellence in Electrical Power Technology Faculty of Engineering Chulalongkom University Bangkok Thailand Department of Electrical Engineering Faculty of Engineering Kasetsart University Bangkok Thailand Department of Computer Engineering and Satellite Research Center Faculty of Engineering Mahanakom University of Technology Bangkok Thailand

This paper presents a new method to solve the constrained unit commitment problem by applying ant colony optimization (ACO) based on the diversity control approach. The pheromone updating rule is modified to control the diversification by adopting a simple mechanism for random selection in ACO. The proposed method is tested on the 10-unit test system with a scheduling time horizon of 24 hours. The numerical results show an economical saving in the total operating cost when compared to the previous literature results. Moreover, two types of the proposed diversity control technique have the features of easy implementation and a better convergence rate superior to a standard ACO.

关键词： Ant colony optimization

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Telerobotic mini-golf: system design for enhanced teleoperator performance

Telerobotic mini-golf: system design for enhanced teleoperat...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： S.R. Munasinghe Ju-Jang Lee T. Usui M. Nakamura N. Egashira Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea Department of Advanced Systems Control Engineering Saga University Saga Japan Department of Control and Information Systems Engineering Kurume National College of Technology Fukuoka Japan

This paper discusses the safety assurance, capability features, and user-friendliness of Internet-based telerobotics, in the sense that how these features could be incorporated in order to enhance teleoperator performance. A comprehensive set of safety features are incorporated to the interface to screen and accept only the safe commands from the remote operator while discarding risky commands. A laser pointer is used to help remote operator in perceiving self-location and navigation, whereas orientation control has been completely automated and synchronized to the position commands of the teleoperator. The effectiveness of these features has been demonstrated by playing telerobotic mini-golf.

关键词： Telerobotics Teleoperators Internet Paper technology control systems Safety Supervisory control Power system modeling System testing computer science

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Certainty equivalence in constrained linear systems subject to stochastic disturbances

Certainty equivalence in constrained linear systems subject ...

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American control Conference (ACC)

作者： I. Batina A.A. Stoorvogel S. Weiland Department of Electrical Engineering Mathematics and Computer Delft University of Technnology Delft Netherlands Department of Mathematics and Computing Science Eindhovan University of Technology Eindhoven Netherlands Control Systems Group Department of Electronical Engineering Eindhovan University of Technology Eindhoven Netherlands

A sufficient condition is provided under which the optimal controller of a constrained optimization problem can be synthesized by combining an optimal state estimator with an optimal static state feedback. An application of a model predictive controller is considered that involves both input and state constraints in a system that is subject to stochastic disturbances.

关键词： Linear systems Stochastic systems State feedback State estimation control systems Optimal control Constraint optimization Q measurement Noise measurement Stochastic processes

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Robust color image retrieval for the World Wide Web

Robust color image retrieval for the World Wide Web

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： B. Smolka M. Szczepanski R. Lukac A.N. Venetsanoloulos Department of Automatic Control Silesian University of Technology Gliwice Poland The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ON Canada

The rapid growth of image archives increases the need for efficient and fast tools that can retrieve and search through a large amount of visual data. In this paper, we propose an efficient method of extracting the image color content, which serves as an image digital signature, allowing us to efficiently index and retrieve the content of large, heterogeneous multimedia Internet based databases. We apply the proposed method for the retrieval of images from the WEBMUSEUM Internet database, containing a collection of fine art images and show that the new method of image color representation is robust to image distorsions caused by resizing and compression and can be incorporated into existing retrieval systems which exploit the information on color content in digital images.

关键词： Robustness Color Image retrieval Web sites Information retrieval Content based retrieval Multimedia databases Internet Image databases Data mining

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Nonparametric technique of impulsive noise removal

Nonparametric technique of impulsive noise removal

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European Signal Processing Conference (EUSIPCO)

作者： B. Smolka S. Budzan A.N. Venetsanopoulos R. Lukac Department of Automatic Control Silesian University of Technology Gliwice Poland The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ON Canada

In this paper a novel class of filters designed for the removal of impulsive noise in color images is presented. The proposed filter class is based on the nonparametric estimation of the density probability function in a sliding filter window. The obtained results show good noise removal capabilities and excellent structure preserving properties of the new impulsive noise removal technique.

关键词： Vectors Estimation

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Weichted Least Squares Parameter Estimation for Model Predictive control of Integrated Wastewater Systems at Medium Time Scale

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IFAC Proceedings Volumes 2004年第11期37卷 273-279页

作者： Konarczak K Rutkowsld T Brdys M.A Gmiński T Department of Automatic Control Gdansk University of Technology ul.G. Nanttowicza 11 ¡2 80-952 Gdansk Poland School of Engineering Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

The paper presents formulation and implementation of Weighted Least Squares algorithm with moving measurement window for a grey box model parameters estimation purposes. The grey box of a biological reactor dynamics is used by Model Predictive controller to control integrated wastewater treatment system at medium time scale. The parameter estimation Weighted Least Squares algorithm is validated by simulation based on recently developed and calibrated model of integrated wastewater treatment system in Kartuzy, Poland.

关键词： Models waste treatment parameter estimation Least Squares Kaiman filtering biotechnology water pollution

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Harmonic detection for shunt hybrid active filter using adaptive filter

Harmonic detection for shunt hybrid active filter using adap...

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Conference on Power engineering Large engineering Systems (LESCOPE)

作者： S. Puengsungwan P. Kumhom K. Chamnongthai A. Chaisawadi R.H. Lasseter Department of Electronics and Telecommunication Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Control and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Electrical and Computer Engineering University of Wisconsin-Madison Madison WI USA

This paper presents harmonic detecting method for a shunt hybrid active filter using adaptive filter. An adaptive noise canceling theory has been applied as a harmonic detection system to determine a harmonic reference signal for controlling an active filter inverter. This paper presents a new configuration of adaptive method to detect the harmonic components from the distorted source current consisting of fundamental, harmonic and interharmonic components. The proposed configuration is tested with the shunt hybrid active filter to compensate the harmonic source current caused by an induction furnace load. To verify the detecting method, the simulation results are revealed via Simulink/Matlab.

关键词： Power harmonic filters Active filters Adaptive filters Programmable control Adaptive control Active noise reduction Noise cancellation Adaptive signal detection control systems Inverters

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Supervisory control of Integrated Wastewater Treatment Systems

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IFAC Proceedings Volumes 2004年第11期37卷 257-264页

作者： M Grochowski M.A Brdys K Duzinkiewicz R Langowski Department of Automatic Control Gdansk University of Technology ul G. Narutowicza 11 12 80 9 52 Gdansk Poland School of Engineering Department of Electrical Electronic and Computer Engineering The university of Birmingham Birmingham B15 2TT UK

control of integrated wastewater treatment plant-sewer systems under full range of disturbance inputs enforces employing advanced optimising control algorithms. The control activities are hierarchically structured into a multilevel-multilayer form Model Predictive control is chosen as a core control technology. As it is impossible to handle sufficiently well all operating conditions of this system, the operating states of the system are distinguished and these are: normal, disturbed and emergency. Formulation of operational states requires introducing the concepts of the core and secondary objectives that divide the system objectives into obligatory and additionally ones. Different control trajectories are designed for corresponding operational states in order to best adopt control actions to current plant conditions. In order to effectively control such complex system the Supervisory Level (SuCL) is introduced. Its main functionality is: to coordinate activities of the control structure, to asses operational states of the system, to asses selection of the control strategies, to asses imposed control setpoints realisation and risk of not fulfilling the objectives. Paper describes units adjacent to SuCL that major function is to provide the information needed by the SuCL and decision making process.

关键词： Supervisory control decision making neural networks hierarchical control optimal control risk waste treatment

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Set-Bounded Joined Parameter and State Estimation for Model Predictive control of Integrated Wastewater Treatment Plant Systems at Medium Time Scale

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IFAC Proceedings Volumes 2004年第11期37卷 755-760页

作者： T. Rutkowski M.A. Brdys K. Konarczak T. Gminski Department of Automatic Control Gdansk University of Technology ul. G. Narutowicza 11/12 80 952 Gdansk Poland School of Engineering Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK

The paper describes set-bounded parameters and state estimation component for Model Predictive control of integrated wastewater treatment plant at medium time scale purposes. This is one of the components within Intelligent Hierarchical control Structure designed in order to cope with problems of the controlled system such us: multiple time scale, highly non linear dynamics, small number of on-line measurements etc. The set-bounded joined parameter and state estimation algorithm generates robust estimates of these parameters and state for Model Predictive control purposes. Both, the estimation algorithm and the Model Predictive controller utilise a grey-box model of controlled plant dedicated for medium time scale. The set-bounded joined state and grey-box model parameters estimation algorithm is validated by simulation. The data were taken partly from real data records gathered at Kartuzy WWTP in Poland and partly from the Kartuzy plant simulation based on recently developed and calibrated plant model.

关键词： biotechnology hierarchical control systems model predictive control robust control estimation algorithms bounding method uncertainty

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Synchronization of chaotic systems via hybrid impulsive and switching control

Synchronization of chaotic systems via hybrid impulsive and ...

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Asian control Conference

作者： Zhi-Hong Guan D.J. Hill Xuemin Shen Xinghuo Yu Department Control Science & Engineering Huazhong University of Science and Technology Wuhan China Department Electronic Engineering City University of Hong Kong Hong Kong China Department Electrical & Computer Engineering University of Waterloo ONT Canada Faculty of Engineering Royal Melbourne Institute of Technology Melbourne VIC Australia

In this paper, a new hybrid impulsive and switching control strategy for chaos synchronization is developed. Using switched Lyapunov functions, several new criteria for exponential stability and asymptotical stability of hybrid impulsive and switching nonlinear systems are established and, particularly, some simple sufficient conditions for driving the synchronization error to zero are proposed. A typical example, the Chua's chaotic circuit, is given for illustrating and visualizing the theoretical results.

关键词： Chaos control systems Chaotic communication Circuit stability Stability criteria Asymptotic stability Nonlinear systems Visualization Cities and towns Lyapunov method

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