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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Doo-Jin Shin Uk-Youl Hah Je-Hie Lee Department of Electrical Engineering Inha University Incheon South Korea Department of Computer Applied Control Doowon Technical College Gyeonggi South Korea

In this paper, the authors propose a servo control system with an observer which can predict one step ahead states as well as disturbances. And also, they utilized two inertia modeling in order to deal with coupled system accurately. The overall control system consists of two parts-a servo controller and an observer. The state observer is designed with the Kalman filter algorithm to estimate the unknown states optimally. It is well known that the Kalman filter is an effective way to estimate the state of a dynamic system with a random noisy environment. A measurement error may occur due to a low resolution encoder in observer design. There are a number of disturbances in servo control systems due the observer which can estimate the disturbances using an inverse matrix of system dynamic equations to unexpected loads, parameter changes and other reasons. Simulation results are carried out to show that the proposed algorithm is able to estimate the speed and position stable and accurately. Also, the performance of the proposed algorithm is shown to be better than the average speed algorithm by some simulation results.

关键词： Servosystems Observers State estimation Equations control systems Servomechanisms Algorithm design and analysis Measurement errors Machinery Educational institutions

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A Web-Based Course in Automatic control for Engineers in Industry

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IFAC Proceedings Volumes 1999年第2期32卷 6405-6409页

作者： Anders Bark Bo Egardt Birgitta Kristiansson Chalmers Open Industry Courses in Electrical and Computer Engineering Chalmers University of Technology S-412 96 Göteborg Sweden Control Engineering Lab Department of Signals and Systems Chalmers University of Technology S-412 96 Göteborg Sweden Department of Electrical Engineering College of Applied Engineering and Maritime Studies Chalmers University of Technology. S-402 72 Göteborg Sweden

This contribution describes the development of a multi-media based course in control, targeted primarily to engineers in industry. We describe some of the difficulties we have encountered in this work, and how we have approached them. Experiences from the first couple of courses will be described. In the presentation at the conference, we will also demonstrate some of the interaction with the course material.

关键词： control education education teaching

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Robust and non-fragile H/sub /spl infin// control of parameter uncertainties time-varying delay systems

Robust and non-fragile H/sub /spl infin// control of paramet...

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SICE Annual Conference

作者： Jong Hae Kim Sang Kyung Lee Hong Bae Park Sensor Technology Research Center Kyungpook National University Taegu South Korea Department of Computer Applied Control Doowon Technical College Ansung South Korea School of Electronic and Electrical Engineering Kyungpook National University Taegu South Korea

This paper describes the synthesis of robust and non-fragile H/sup /spl infin// state feedback controllers for linear systems with time delay and parameter uncertainties, and static state feedback controller with multiplicative uncertainty. The sufficient condition of controller existence, the design method of robust and non-fragile H/sup /spl infin// state feedback controller, and the measure of non-fragility in controller are presented. Also, using some changes of variables and Schur complements, the obtained sufficient condition can be rewritten as an linear matrix inequality form in terms of transformed variables. Therefore, the obtained robust and non-fragile H/sup /spl infin// controller guarantees the asymptotic stability and disturbance attenuation of the closed loop system in spite of controller gain variations within a degree.

关键词： Robustness Robust control State feedback control system synthesis Linear feedback control systems Sufficient conditions control systems Linear systems Delay effects Uncertain systems

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Robust controller design for RTP system using structured uncertainty approach

Robust controller design for RTP system using structured unc...

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SICE Annual Conference

作者： Sang Kyung Lee Jong Hae Kim Do Chang Oh Hong Bae Park Department of Computer Applied Control Doowon Technical College Ansung South Korea Sensor Technology Research Center Kyungpook National University Taegu South Korea Department of Information Electronics and Communication Engineering Konyang University South Korea School of Electronic and Electrical Engineering Kyungpook National University Taegu South Korea

In this paper, we propose an robust controller design of rapid thermal processing (RTP) system using the structured uncertainty approach. Using the weighted mixed sensitivity function, we solve the robust stability problem against disturbance and temperature variation, and design a /spl mu/ controller using the curve fitting method against structured uncertainty. Finally, the simulation results are proposed to show the validity of the proposed method.

关键词： Robust control control systems Uncertainty Temperature control Robust stability Thermal stresses Communication system control Temperature sensors Ovens Semiconductor device modeling

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Observer-based fuzzy H/sup /spl infin// control for uncertain nonlinear systems with time delays

Observer-based fuzzy H/sup /spl infin// control for uncertai...

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American control Conference (ACC)

作者： Kap Rai Lee Jong Hae Kim Eun Tae Jeung Han O Yun Hong Bae Park Department of Computer Applied Control Doowon Technical College Ansung Gyeonggi South Korea Sensor Technology Research Center Kyungpook National University Taegu South Korea Department of Control and Instrument Engineering Changwon NatE28099l University Kyungnam South Korea Department of Electronics Kumi College Kumi Gyeongbuk South Korea School of Electronic and Electrical Engineering Kyungpook National University Taegu South Korea

ISBN: (纸本)0780349903

This paper presents the problem of observer-based fuzzy H/sup /spl infin// control for a class of uncertain nonlinear systems with time-varying delayed systems on the basis of Takagi-Sugeno fuzzy model. First, we design a fuzzy observer such that destination error system is globally, exponentially stable. Next, we design a fuzzy H/sup /spl infin// controller such that the closed loop system is globally, exponentially stable and achieves L/sub 2/ gain performance. The fuzzy control systems utilize the concept of the so-called parallel distributed compensation. A sufficient condition for the existence of robust fuzzy H/sup /spl infin// controllers and observers are given in terms of linear matrix inequalities (LMIs). The control gains can also be directly obtained from the LMI solutions.

关键词： Fuzzy control Fuzzy systems Nonlinear control systems Nonlinear systems Time varying systems Delay systems Takagi-Sugeno model control systems Closed loop systems Performance gain

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Self Learning Fuzzy Logic control of Dissolved Oxygen Concentration in a Fermentation Process

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IFAC Proceedings Volumes 1998年第8期31卷 283-288页

作者： K.O. Jones D. Williams S.H. Ghwanmeh S.A. Caulder Control Systems Research Group School of Engineering Liverpool John Mores University Liverpool United Kingdom Computer and Control Department Hijjawi Faculty of Applied Engineering Yarmouk University Irbid Jordan

Biotechnological processes are notoriously difficult to control using conventional methods owing to their time-variant and non-linear characteristics. An alternative control method is to utilise artificial intelligence such as fuzzy logic. A problem with the development of fuzzy logic controllers is rule-base generation. A Self-Learning Fuzzy Logic control (SLFLC) methodology offers a possible alternative solution. A study is presented illustrating the performance of a SLFLC by demonstrating its ability to generate a rule-set based on a predetermined criteria. The SLFLC described has been successfully applied to simulations of a Bakers Yeast fed-batch fermentation. Results demonstrate how the learning mechanism produces a rule-set which controls the dissolved oxygen concentration throughout the fermentation process duration.

关键词： Dissolved oxygen fermentation processes fuzzy logic control self-learning simulation

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Stability analysis of an active filter using cascade connection of switching regulators

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Electronics and Communications in Japan (Part I: Communications) 1998年第6期80卷

作者： Kei Ninomiya Koosuke Harada Izumo Miyazaki Department of Electronics Kyushu University Fukuoka Japan 812 Applied Electronics Laboratory for Energy Kumamoto Institute of Technology Kumamoto Japan 860 Department of Computer and Control Engineering Kitakyushu National College of Technology Kitakyushu Japan 803

Active filters have been widely used for correcting power factor deterioration caused by waveform distortions of the current due to the capacitor input rectifier. To realize both the voltage regulation and the power factor correction it seems appropriate to use two switches, one for power factor correction and the other for voltage regulation. In this paper, using the state space averaging method, we make a stability analysis of a cascade-connected active filter in which the first stage is the boost converter and the second stage is the buck converter. We analyze the stability of the second stage as a function of the feed-forward gain of the first stage and the capacitance between the stages. © 1997 Scripta Technica, Inc. Electron Comm Jpn Pt 1, 80(6): 87–94, 1997

关键词： active filter feed-forward small signal continuous conduction mode stability voltage regulation

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Performance Evaluation of an On-Line Self-Learning Fuzzy Logic controller applied to Non-Linear Processes

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IFAC Proceedings Volumes 1997年第9期30卷 245-250页

作者： S.H. Ghwanmeh K.O. Jones D. Williams Computer and Control Department Hijjawi Faculty for Applied Engineering Yarmouk University 211-63 Jrbid Jordan Control Systems Research Group School of Electrical Engineering Electronics and Physics Liverpool John Moores University Byrom Street Liverpool L3 3AF United Kingdom E-mail:

The generation of rule-bases in conventional fuzzy logic controllers can be a difficult and time consuming problem for implementation by process operators thus affecting their wider applicability. A Self-Learning Fuzzy Logic control (SLFLC) offers a possible solution. A performance study is therefore presented to evaluate the performance of a proposed SLFLC by analysing its transient performance for a variety of on-line tests and examining its ability to generate a consistent set of rules, based on a predetermined criteria. The results presented show that even with a limited knowledge of the process, the self-learning procedure is able to develop a suitable set of rules and produce a satisfactory process performance with some degree of robustness and repeatability when applied to a non-linear single-input single-output (SISO) or multi-input multi-output (MIMO) laboratory liquid-level processes.

关键词： Fuzzy logic self-adaptive control on-line control non-linear control

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Global asymptotic stabilization of the ball-and-beam system

Global asymptotic stabilization of the ball-and-beam system

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IEEE Conference on Decision and control

作者： C. Barbu R. Sepulchre Wei Lin P.V. Kokotovic Department of Electrical and Computer Engineering University of California Santa Barbara CA USA Center for Systems Engineering and Applied Mechanics Universite Catholique de Louvain Louvain-la-Neuve Belgium Department of Systems Control and Industrial Engineering Case Western Reserve University Cleveland OH USA

For the well known ball-and-beam system, we design a new saturation control law, which employs state-dependent saturation levels and guarantees global asymptotic stability, not achieved with previous designs.

关键词： control systems Stability Force control Force feedback Friction Nonlinear control systems control nonlinearities Angular velocity Nonlinear equations Acceleration

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Developing a prototype concurrent design tool for composite topside structures

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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