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Decomposition of a fuzzy controller based on the inference break-up method

Intelligent Data Analysis 1999年第2期3卷 127-137页

作者： Golob, Marjan Laboratory for Process Automation University of Maribor Faculty of Electrical Engineering and Computer Science Smetanova 17 2000 Maribor Slovenia

A concept called the decomposition of multivariable control rules is presented. Fuzzy control is the application of the compositional rule of inference and it is shown how the inference of the rule base with complex rules can be reduced to the inference of a number of rule bases with simple rules. A fuzzy logic based controller is applied to a simple magnetic suspension system. The controller has proportional, integral and derivative separate parts which are tuned independently. This means that all parts have their own rule bases. By testing it was found that the fuzzy PID controller gives better performance over a typical operational range then a traditional linear PID controller. The magnetic suspension system and the contact-less optical position measurement system have been developed and applied for the comparative analysis of the real-time conventional PID control and the fuzzy control. © 1999 Elsevier science B.V. All rights reserved.

关键词： Fuzzy control

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An intelligent AE sensor for the monitoring of finish machining process 2

An intelligent AE sensor for the monitoring of finish machin...

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2nd International Conference on Intelligent Processing and Manufacturing of Materials, IPMM 1999

作者： Dolinsek, S. Kopac, J. Viharos, Z.J. Monostori, L. University of Ljubljana Faculty of Mechanical Engineering Ljubljana Slovenia Computer and Automation Research Institute Hungarian Academy of Science Budapest Hungary

ISBN: (纸本)0780354893

The paper presents the latest results of sensing the cutting process on the basis of AE signals and some particularities in further development of the monitoring model for the finish turning process. Due toinon-linearity, the large number of influencing parameters and missing information in AE data, the Artificial Neural Networks were chosen as a monitoring decision tool. The problem of accurateness in predicting the surface roughness on the basis of AE - because of the mutual interdependence of the data - requires a special procedure for building a neural network model. The final aim of such an approach is presented as improvements in learning or considerable reduction in error prediction. Further development of the monitoring model has the goal of building a so-called intelligent sensor, which should be able to perform the signal conditioning and feature extraction process. © 1999 IEEE.

关键词： Surface roughness

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Modelling and analysis of dynamic properties of drive systems with gears

Modelling and analysis of dynamic properties of drive system...

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ASME 1999 Design engineering Technical Conferences, DETC 1999

作者： Kratochvil, Ctirad Biezina, Tomàs Kotek, Vladimir Krejsa, Jifi Institute of Mechanics of Solids Faculty of Mechanical Engineering TU of Brno Czech Republic Institute of Automation and Computer Science Faculty of Mechanical Engineering TU of Brno Czech Republic Mechatronics Centre Institute of Thermomechanics Czech Academy of Science Technicka 2. Bmo616 69 Czech Republic

ISBN: (纸本)9780791880395

Contemporary trends show a marked tendency for solution of problems of dynamic analysis of drive systems as early as the design stage. 11 shows that during the modelling of complex drive systems it is neccssaiy to respect its structural complexity and therefore it is necessary to make the models of particular drive subsystems first and Uien to combine it altogelher. In the paper authors present some inetliods of creation of suitable mathematical models of complex drive systems respecting the drive structxire. The inetliods are (lien applied onto real tasks. Examples are included. © 1999 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Gas turbines

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Identification of a nonlinear vibration system using simulated annealing, genetic algorithm and programming

Identification of a nonlinear vibration system using simulat...

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ASME 1999 Design engineering Technical Conferences, DETC 1999

作者： Sláma, Lubomir Krejsa, Jiří Balátĕ, Mojmir Slavík, Jan Mechatronics Centre Institute of Thermomechanics Czech Academy of Science Technicka 2 Brno616 69 Czech Republic Mechatronics Centre Institute of Thermomechanics Czech Academy of Science Czech Republic Institute of Automation and Computer Science Faculty of Mechanical Engineering TU of Brno Czech Republic Institute of Mechanics of Solids Faculty of Mechanical Engineering TU of Brno Czech Republic

ISBN: (纸本)9780791880395

Application of genetic algorithm and genetic programming to identification of a nonlinear vibration system is presented. Both the theoretical groundwork and experimental results are included. The genetic algorithm is used for identification of parameters of nonlinear stiffness and friction damping characteristics of a single-degree-of-freedom model of a vibration isolation system. The genetic programming is used for identification of a functional form and parameters of a load-deflection characteristic of a rubber isolator. Obtained results from computational experiments are presented and discussed. Results of GA are compared to results obtained by using a simulated annealing method. © 1999 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Genetic algorithms

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Finite time output tracking control of nonlinear dynamic systems with non-minimum phase

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IFAC Proceedings Volumes 1999年第2期32卷 1396-1400页

作者： Xinghuo Yu Yuqiang Wu Man Zhihong faculty of Informatics and Communication Central Queensland UniversityRockhampton Qld 4702 Australia. Department of Automation Qufu Normal University Qufu Shandong People's Republic of China Department of Electrical Engineering and Computer Science University of Tasmania Hobart 7001 Australia.

In this paper the terminal sliding mode technique is used for solving the finite time output tracking problem for non-minimum phase nonlinear systems. A novel idea of stabilizing zero dynamics of the non-minimum phase... 详细信息

关键词： Sliding mode variable structure systems stability nonlinear systems non-minimum phase

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Fault detection filter for linear time varying systems: An algebraic-geometric approach 4

Fault detection filter for linear time varying systems: An a...

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4th European Control Conference, ECC 1997

作者： Szigeti, F. Bokor, J. Edelmayer, A. Tarantino, R. Department of Control Engineering Faculty Universidad de los Andes Mérida5101 Venezuela Systems and Control Laboratory Computer and Automation Institute Hungarian Academy of Science XI Kende u. 13-17 BudapestH1111 Hungary Maraven Oil Refinery Punta Cardon Venezuela Universidad de Los Andes Mérida5101 Venezuela

ISBN: (纸本)9783952426906

In this paper we consider the fault isolation problem for the linear time varying systems. Our approach is based on characterization of the observability of LTV systems by Kalman's rank condition, which permits us to design fault detection filters, feeding also the derivatives of the inputs and the outputs. We prove, using a computable method, that the isolation problem can be solved by generalized Luenberger's observer if and only if the detectability and the weak separability of fault signatures holds.

关键词： Observability

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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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Ionic current model of the retinal photoreceptor and simulation analysis of the photoresponses

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SYSTEMS AND computerS IN JAPAN 1996年第12期27卷 10-21页

作者： Usui, TOS Kamiyama, Y Faculty of Information Engineering Toyohashi University of Technology Shim Usui:graduated in 1974 with his Ph.D. degree in Computer Science from the University of California. He was appointed Research Associate at Nagoya University in 1974 a Lecturer at Toyohashi University of Technology in 1979 and an Associate Professor and then a Professor in 1986. He has been engaged in research on physiological information engineering and physiological engineering. He is the author of Basic Physwlqicul Signal Processing. He is a member of IEE Institute of Measurement and Automation Japan Institute of Information Processing Japan Institute of Medical Engineering Japan Institute of Physiology Japan Institute of Neural Science Japan Institute of Neural Networks Japan: and INNS. He is an IEEE fellow.

The fact that the reception of optical information by the retinal photoreceptor and the process of its transformation to the membrane voltage response are due to an interaction between the photocurrent from the outer segment and each ionic current in the inner segment has been confirmed by many physiological experiments. However, the properties of each ionic current in the photoreceptor have not been clear since no physiologically reliable model of the retinal photoreceptor has been constructed. This paper proposes a model of a retinal photoreceptor, which is a combination of the outer segment model (devised by Torre et al.) and the inner segment model (devised by the present authors). It has been confirmed that this model can accurately represent the electron physiological properties of a retinal photoreceptor. Using this model simulation, the relationship between the photocurrent and the photoresponse dynamics, and an oscillatory phenomena caused by a strong light flash have been analyzed. The results show that the dynamic and nonlinear response characteristics of a retinal photoreceptor are due to the interactions between the nonlinear ionic current in the inner segment and the mechanism of the intracellular calcium.

关键词： retinal photoreceptor photoresponse intracellular calcium mechanism simulation analysis

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EDITORIAL

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International Journal of Pattern Recognition and Artificial Intelligence 1995年第4期9卷 599-600页

作者： L. S. DAVIS K. INOUE M. NIVAT A. ROSENFELD P.S.P. WANG Institute for Advance Computer Studies University of Maryland College Park Maryland 20742-3251 USA Department of Computer Science and Systems Engineering Faculty of Engineering Yamaguchi University Ube 755 Japan Universite Paris VII L.I.T.P. Institut Blaise Pascal 2 Place Jussieu Paris Cedex France Center for Automation Research University of Maryland College Park Maryland 20742-3275 USA College of Computer Science Northeastern University Boston USA

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Multiagent fault‐diagnosis expert system in power systems

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European Transactions on Electrical Power 1995年第5期5卷 341-347页

作者： Wang, J.P. Trécat, J. Dr. Jianping Wang is a doctor fellow in the Faculte Polytechnique de Mons in Belgium. His current research field is parallel processing applications in power systems. Dr. Wang obtained his BS degree from Southwest Jiaotong University in P.R. Chinain 1982. From 1982 to 1990 he was appointed as an assistant lecturer. lecturer and associate professor respectively in the electrical engineering department of Southwest Jiaotong University. He obtained his Ph.D in the FacultC Polytechnique de Mons in July of 1993. (BD Dolez 3 1 FPMS B-7000 Mons Belgium T +32-65/37 41 87 Fax +32-65/37 43 00) Professor J. Trécat is a director in the power system laboratory in the Faculty Polytechnique de Mons. He obtained his Ph.D in the University of Manchester Institute of Science and Technology(UM1ST) in U.K. in 1970. He has been working in the fields of power system automation artificial intelligence application and computer vision in the Facult6 Polytechnique de Mons since 1970. He is a senior member of IEEE and he has made much contribution both in electrical engineering education and research. (BD Dolez 3 I FPMS B-7000 Mons T +32-651374185. Fax +32-6513743 00)

In order to solve the speed problem and shallow reasoning problem met in current research in fault diagnosis expert system, this paper presents a model based parallel fault diagnosis expert system for energy management systems (EMS). The Petri net model, which corresponds to the relationship between power system components and their protection systems, has been used for the inference in fault diagnosis. A multiagent parallel processing expert system, which is based on five transputers in Sun workstation, has been built for fault diagnosis purposes. The test results show that this expert system is not only fast but also has better performances. Copyright © 1995 John Wiley & Sons, Ltd.

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