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A Notion of Stochastic Input-to-State Stability and Its Application to Stability of Cascaded Stochastic Nonlinear Systems

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Acta Mathematicae Applicatae Sinica 2008年第1期24卷 141-156页

作者： Shu-jun Liu Ji-feng Zhang Zhong-ping Jiang Department of Mathematics Southeast University Nanjing 210096 China Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China Department of Electrical and Computer Engineering Polytechnic University 5 Metrotech Center Brooklyfl N.Y. 11201 USA

In this paper, the property of practical input-to-state stability and its application to stability of cascaded nonlinear systems are investigated in the stochastic framework. Firstly, the notion of （practical） stochastic input-to-state stability with respect to a stochastic input is introduced, and then by the method of changing supply functions, （a） an （practical） SISS-Lyapunov function for the overall system is obtained from the corresponding Lyapunov functions for cascaded （practical） SISS subsystems.

关键词： Stochastic nonlinear systems Stochastic input-to-state stability （SISS） SISS-Lyapunov function

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Igital redesign of the decentralized adaptive control for linear large-scale systems with actuator faults

Igital redesign of the decentralized adaptive control for li...

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10th IASTED International Conference on control and Applications, CA 2008

作者： Tsai, J.S.H. Lin, M.H. Guo, S.M. Sun, P.Y. Shieh, L.S. Liu, C.R. Department of Electrical Engineering Control System Laboratory National Cheng Kung University Tainan 701 Taiwan Department of Computer Science and Information Engineering National Cheng Kung University Tainan 701 Taiwan Department of Electrical and Computer Engineering University of Houston Houston TX 77204-4005 United States

ISBN: (纸本)9780889867468

A novel digital redesign of the analog model-reference-based decentralized adaptive controller is proposed for the sampled-data large scale system consisting of N interconnected linear subsystems with actuator faults. The adaptation of the analog controller gain is derived by using the model-reference adaptive control theory based on Lyapunov method. In this paper, it is shown that the sampled-data decentralized adaptive control system is theoretically possible to asymptotically track the desired output with a specified performance even when actuator faults occur. Then, a method of actuator fault recovery is proposed. With the estimated faults, one can use the proposed input compensation method to solve actuator faults. In this paper, we also introduce a prediction-based digital redesign method to develop the corresponding sampled-data controller for the sampled-data decentralized adaptive control systems.

关键词： Lyapunov methods

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Op-Amp based analog implementation of the Integral Resonant control scheme 19

Op-Amp based analog implementation of the Integral Resonant ...

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19th International Conference on Adaptive Structures and Technologies 2008, ICAST 2008

作者： Pereira, E. Moheimani, S.O.R. Aphale, S.S. Department of Electrical Electronic and Control Engineering University of Castilla-La Mancha Spain School of Electrical Engineering and Computer Science University of Newcastle CallaghanNSW Australia Kings College University of Aberdeen United Kingdom

ISBN: (纸本)9781617389870

The Integral Resonant control (IRC) is a simple low-order control scheme that has been introduced as a high-performance controller design methodology for flexible structures with collocated actuator-sensor pairs. It is capable of achieving significant damping, over several modes, while guaranteeing closed-loop stability of the system in presence of unmodelled out-of-bandwidth dynamics. These reasons make the IRC an ideal controller for various industrial damping applications, if packaged in a simple easy-to-implement electronic module. In this work, we propose an analog implementation of the IRC scheme using a single Op-Amp circuit. The goal is to demonstrate that with a simple analog realization of the modified IRC scheme, it is possible to damp a large number of vibration modes. A brief discussion about the modeling, circuit considerations, implementation and experimental results is presented in order to validate the usefulness and practicality of the proposed analog IRC implementation.

关键词： Operational amplifiers

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Modeling and simulation of electromechanical systems by the use of the programming tools included in modern graphical packages

Modeling and simulation of electromechanical systems by the ...

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International Conference on electrical Machines, ICEM

作者： Krystyna Macek-Kaminska Marcin Kaminski Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Opole Poland

The aim of this paper is an attempt of the simulation of the electromechanical systems with the use of the programming tools included in the modern graphical packages or graphical extensions to the programming languages. The advantage of such approach lies in possibility of the simultaneous high quality visualization of the currently obtained results. The possibilities of new graphical packages enable making calculations on the Web platform - it is new and very interesting idea. The proposed solutions can be used both to the educational and presentation tasks.

关键词： Electromechanical systems Packaging Object oriented modeling Mathematical model Computational modeling Programming profession computer languages Operating systems Microcomputers computer graphics

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Convex relaxation approach to the identification of the Wiener-Hammerstein model

Convex relaxation approach to the identification of the Wien...

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IEEE Conference on Decision and control

作者： Kin Cheong Sou Alexandre Megretski Luca Daniel Department of Automatic Control Lund Institute of Technology Sweden Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology USA

ISBN: (纸本)9781424431236

In this paper, an input/output system identification technique for the Wiener-Hammerstein model and its feedback extension is proposed. In the proposed framework, the identification of the nonlinearity is non-parametric. The identification problem can be formulated as a non-convex quadratic program (QP). A convex semidefinite programming (SDP) relaxation is then formulated and solved to obtain a sub-optimal solution to the original non-convex QP. The convex relaxation turns out to be tight in most cases. Combined with the use of local search, high quality solutions to the Wiener-Hammerstein identification can frequently be found. As an application example, randomly generated Wiener-Hammerstein models are identified.

关键词： System identification Quadratic programming Output feedback Power system modeling Piecewise linear techniques Polynomials Gaussian noise Least squares approximation Maximum likelihood estimation Noise measurement

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The influence of the Cole-Cole model coefficients on the parameters of the recovery voltage phenomena of paper-oil insulation

The influence of the Cole-Cole model coefficients on the par...

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International Conference on Conduction and Breakdown in Dielectric Liquids

作者： S. Wolny M. Zdanowski Faculty of Electrical Engineering Automatic Control and Computer Science Chair of Electrical Power Engineering Opole University of Technology Opole Poland

The paper presents the application of the Cole-Cole model for determining the runs of the return voltage of the paper-oil insulation sample through a computer simulation. Different insulation conditions were simulated through an adequate selection of parameters alpha and tau of the Cole-Cole model. For calculation purposes, a series-parallel substitute scheme, obtained through approximation of a discrete characteristic operator impedance Z a of the model applied, was used. The diagnostics of the simulated insulation condition was based on the analysis of a few selected parameters of the return voltage, obtained from time characteristics.

关键词： Insulation Impedance Mathematical model Approximation methods Voltage measurement Frequency measurement Computational modeling

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Experimental evaluation of power control algorithms for wireless sensor networks

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IFAC Proceedings Volumes 2008年第2期41卷 619-624页

作者： Pan Gun Park Carlo Fischione Karl H. Johansson Automatic Control Lab School of Electrical Engineering Royal institute of technology Stockholm Sweden Department of Electrical Engineering and Computer Sciences UC Berkeley Berkeley CA USA

The main contribution of this paper is the implementation and experimental evaluation of thee radio power control algorithms for wireless sensor networks. We illustrate the necessity of lightweight radio power control algorithms for the deployment of wireless sensor networks in realistic situations. Furthermore, based on a simple loss model, we develop an algorithm that optimizes the transmit power while guaranteeing a desired packet error probability. The simple power control strategy is also compared with two other strategies in experiments using Tmote Sky sensor nodes. A component-based software implementation in the Contiki operating system is used.

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Static electrification properties of hexane and cyclohexane mixtures

Static electrification properties of hexane and cyclohexane ...

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International Conference on Conduction and Breakdown in Dielectric Liquids

作者： M. Zdanowski Automatic Control and Computer Science Chair of Electrical Power Engineering Chair of Electrical Power Engineering Opole University of Technology Opole Poland

The paper presents research results on ECT (electrostatic charge tendency) of cyclohexane and hexane mixtures, that is dielectric liquids of a simple chemical structure and high purity (pro analysi). The research tests are carried out in a spinning disk system, where the factors affecting the value of the electrification current registered are a varying composition of the mixture and the rotational speed of the disk. In the next stage physicochemical parameters are measured in order to determine the relationship between the properties of the mixtures under study and the electrification current generated. The research results show that the ECT of the mixture depends, to a large extent, on the proper selection of particular components.

关键词： Electrostatics Temperature measurement Magnetic liquids Dielectric liquids Current measurement Spinning Magnetic field measurement

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Maximum a posteriori video super-resolution with a new multichannel image prior

Maximum a posteriori video super-resolution with a new multi...

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16th European Signal Processing Conference, EUSIPCO 2008

作者： Belekos, Stefanos P. Galatsanos, Nikolaos P. Katsaggelos, Aggelos K. Faculty of Physics Department of Electronics Computers Telecommunications and Control National and Kapodistrian University of Athens Panepistimiopolis Zografos 15784 Athens Greece Department of Electrical Engineering and Computer Science Northwestern University Evanston IL 60208-3118 United States Department of Electrical and Computer Engineering University of Patras 26500 Rio Greece

Super-resolution (SR) is the term used to define the process of estimating a high resolution (HR) image or a set of HR images from a set of low resolution (LR) observations. In this paper we propose a class of SR algorithms based on the maximum a posteriori (MAP) framework. These algorithms utilize a new multichannel image prior model, along with the state-of-the art image prior and observation models. Numerical experiments comparing the proposed algorithms, demonstrate the advantages of the adopted multichannel approach. copyright by EURASIP.

关键词： Optical resolving power

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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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