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1st Euromicro Workshop on Advanced Mobile Robots, EUROBOT 1996

作者： Van Oosten, Daan C. Nijenhuis, Lucas F.J. Bakkers, Andre W.P. Vervoort, Wiek A. Dutch Open University P.O. Box 2960 Heerlen6401 DL Netherlands Control Laboratory University of Twente Electrical Engineering Faculty P.O.Box 217 Enschede7500 AE Netherlands Systems Programming and Architecture University of Twente Informatics Department P.O.Box 217 Enschede7500 AE Netherlands

ISBN: (纸本)0818676957

This paper describes a part of the development of an adaptive autonomous machine that is able to move in an unknown world extract knowledge out of the perceived data, has the possibility to reason, and finally has the capability to exchange experiences and knowledge with other agents. The agent is not pre-programmed by its designer but was given simple rules of life, i.e. what is good and what is bad. By evaluating its sensor inputs these rules of life were transformed into a rule based reactive system. Simulations of the system showed that the agent is able to learn by its own experience. By representing the learned knowledge in an appropriate way, the acquired knowledge could be judged on its effectiveness and also this knowledge could be shared with other, less experienced agents. © 1996 IEEE.

关键词： Knowledge management

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Quantum and thermodynamic self-organization conditions for artificial life of biological mobile micro-nano-robot with AI control. (Report 2. Methodology of R&D and stochastic dynamic)

Quantum and thermodynamic self-organization conditions for a...

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International Symposium on Micro Machine and Human Science

作者： S.V. Ulyanov K. Yamafuji T. Fukuda F. Arai G.G. Rizzotto A. Pagni Department of Mechanical and Control Engineering University of Electro-Communications Chofu Tokyo Japan Department of Mechano-Informatics and Systems University of Nagoya Nagoya Japan SGS-THOMSON Microelectronics Corporate Advanced System Architectures Agrate-Brianza Italy

A new methodology of R&D of micronano-robots (MNR) based on modelling of the nonlinear master dissipative stochastic equations of MNR-motion with minimum entropy production is described. The methodology includes: hierarchical levels for the description of the dynamic behavior of MNR based on laws of microphysics, an extraction of information from coherent states of MNR using quantum non-demolition (QND) measurement processes, logic of intelligent dynamic behavior, optimal control of states, and the dynamic system theory of mechanical motion. On the basis of nonlinear dissipative equations of motion a new quantum postulate for the description of MNR as open thermodynamic and quantum dynamic systems is introduced. Physical conditions for optimal intelligent control of thermodynamic and quantum systems are introduced. The intelligent thermodynamic behaviour of MNR from the artificial life point of view is described. New nonlinear mechanics with entropy exchange are used. The thermodynamic stability conditions for MNR are developed.

关键词： Thermodynamics Nonlinear dynamical systems Nonlinear equations Entropy Stochastic processes Production Data mining Quantum mechanics Mechanical variables measurement Motion measurement

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DISTURBANCE TORQUE ESTIMATION IN A SENSORLESS DC DRIVE

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1995年第4期42卷 351-357页

作者： BUJA, GS MENIS, R VALLA, MI Institute of Management and Engineering University of Padova Vicenza Italy Department of Electrotechnics Electronics and Informatics University of Trieste Trieste Italy National Research Council CONICET Laboratory of Industrial Electronics Control and Insturmentation National University of La Plata La Plata Argentina

The estimation of the disturbance torque in a sensorless de drive is carried out by extending the classical observer theory, Three estimation schemes are formulated according to the representation of the disturbance torque and the processing of the observer states, In addition to the disturbance torque, all the schemes deliver an estimation of the motor speed, Steady-state accuracy and dynamics of the schemes are first determined in nominal conditions, identifying the scheme with the best performance, The effects of variations in the motor parameters are then analyzed, with the finding that a proper modeling of the motor makes the steady-state estimation of the disturbance torque insensitive to any variation, As a test, the schemes are applied to a sensorless de drive for both compensating for the disturbance torque and closing the speed loop, The responses obtained with the best-performance scheme are reported.

关键词： Torque Drives DC motors Regulators Voltage Observers Steady-state Testing Laboratories Yield estimation

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Fuzzy non-linear regression method for intensification of the object's vagueness representation

Fuzzy non-linear regression method for intensification of th...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： M. Pokorny Electrical Engineering and Informatics Department of Measurement and Control Technical University of Ostrava Ostrava Czech Republic

The paper deals with problems of structural and parameters identification of nonlinear production models, which are based on regression methods and use the theory of fuzzy sets for representation of indeterminacy. The aim is to present a new generalized fuzzy nonlinear analysis and to formulate appropriate methodology of modeling and identification method. The paper presents the corresponding computer program module for real-time new nonlinear regression analysis and to carry out a numerical experiment.< >

关键词： Fuzzy systems Fuzzy reasoning Linear regression informatics Parameter estimation Production Fuzzy sets Regression analysis Least squares methods Ear

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Formal Specification Applied to control Systems Development

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IFAC Proceedings Volumes 1995年第25期28卷 115-120页

作者： K. Brink L.J.G. Bun P.M. Bruijn G. Frensel J. van Katwijk H. Toetenel Department of Mathematics and Informatics P.G.Box 356 2600 AJ Delft The Netherlands tel: +31 15 2784433 Control Laboratory Department of Electrical Engineering Delft University of Technology P.G. Box 5031 2600 GA Delft The Netherlands

Formal software specification languages are becoming sufficiently powerful to consider their use in application domains as realistic. This paper reports on a project aiming at the application of formal specification notations and techniques in the development of real-time control applications. It puts emphasis on the development of reliable control systems by means of the integration of a formal specification notation in the controller development process. This paper discusses the application of ASTRAL (Ghezzi and Kemmerer, 1991a) for the requirements specification of a robot control system. It shows that formal specification provides a useful extension to current modelling capabilities in the application domain

关键词： Formal Specification control Systems Real-Time Robot control Verification

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A Deadlock Avoidance Policy for a Class of FMS

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IFAC Proceedings Volumes 1995年第24期28卷 281-286页

作者： A. Gurel O.C. Pastravanu F.L. Lewis Department of Electrical and Electronic Engineering Eastern Mediterranean University Famagusta North Cyprus Mersin 10 Turkey Department of Automatic Control and Industrial Informatics Technical University of Iasi 6600 Iasi Romania Automation and Robotics Research Institute The University of Texas at Arlington Forth Worth Texas 76118 USA

A real-time deadlock avoidance policy is proposed for a subclass of FMS. To model the flow of parts in the FMS, a new formulation, which separates the controller from the workcell dynamics, is adapted. The controller is rule-based, and is represented as a set of matrix equations over ( min , +) algebra. The proposed scheme is founded on a Petri net-based analysis of deadlock situations in FMS. It handles the problem of deadlock on an on-line basis, as part of the more general issue of conflict resolution.

关键词： Discrete-event manufacturing systems flexible manufacturing systems deadlock avoidance rule-based controller Petri-nets

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MRAS identification of the induction motor parameters in PWM inverter drives at standstill

MRAS identification of the induction motor parameters in PWM...

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International Conference on Industrial Electronics, control and Instrumentation

作者： G.S. Buja R. Menis M.I. Valla Institute of Management and Engineering University of Padova Vicenza Italy Department of Electrotechnics Electronics and Informatics University of Trieste Trieste Italy National Research Council (COMCET)and Laboratory of Industrial Electronics Control andInstrumentation Engineering Faculty National University of La Plata Plata Argentina

A model-reference adaptive control system (MRACS) approach is developed for identifying the parameters of an induction motor (IM) in PWM inverter-fed drives at standstill. The theoretical background of the approach is first presented. The case of known IM torque constant is then considered and an algorithm for identifying the IM parameters is derived. A sensitivity analysis to uncertainties in the torque constant is accomplished. Finally, the MRACS approach is applied to a commercial field-oriented IM drive and the motor parameters are identified. A test which validates the experimental results is also carried out.

关键词： Induction motors Pulse width modulation inverters Industrial electronics Adaptive systems Testing Torque control Stators Inductance Least squares methods Resonance light scattering

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Issues in real-time process controller realization

Issues in real-time process controller realization

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20th EUROMICRO Conference on System Architecture and Integration, EUROMICRO 1994

作者： Brink, K. Bruijn, P.M. Frensel, G. Van Katwijk, J. Toetenel, H. Control Laboratory Department of Electrical Engineering Delft University of Technology P.O. Box 5031 2600 GA Delft Netherlands Department of Mathematics and Informatics P.O. Box 356 2600 AJ Delft Netherlands

ISBN: (纸本)0818664304

The first step tn the software developnient process is the construction of a requirements specification. Ideally such a specification expresses all requirements to be posed upon the software to be developed. Current formal methods lack one desirable property: their use requires skills that are often not possessed by specialists from other disciplines. This lack of under-standability complicates the. realization of systems. In this paper we address problems that arise in the specification of timing requirements for a software controller. It turns out that such requirements are often implicitly present in the domain oriented specification. This process is illustrated with a case study. Finally we address solutions for the problems encountered, which emphasize the need for developing specification formalisms that are suited to specialists from various disciplines. © 1994 IEEE.

关键词： Process control

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Issues in real-time process controller realization

Issues in real-time process controller realization

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EUROMICRO Conference

作者： K. Brink P.M. Bruijn G. Frensel J. van Katwijk H. Toetenel Department of Mathematics and Informatics Delft Netherlands Control Laboratory Department of Electrical Engineering Delft University of Technnology Delft Netherlands

The first step in the software development process is the construction of a requirements specification. Ideally such a specification expresses all requirements to be posed upon the software to be developed. Current formal methods lack one desirable property: their use requires skills that are often not possessed by specialists from other disciplines. This lack of understandability complicates the realization of systems. In this paper we address problems that arise in the specification of timing requirements for a software controller. It turns out that such requirements are often implicitly present in the domain oriented specification. This process is illustrated with a case study. Finally we address solutions for the problems encountered, which emphasize the need for developing specification formalisms that are suited to specialists from various disciplines.< >

关键词： Process control Formal specifications control systems Design engineering Timing Software design Real time systems Embedded software Laboratories Mathematics

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Quasi-resonant multi-output DC/DC converter with push-pull topology

Quasi-resonant multi-output DC/DC converter with push-pull t...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： L. Rossetto G. Spiazzi P. Tenti F. Brasola L. Fontanella G. Patechi Department of Electrical Engineering University of Padova Padova Italy Department of Electronics and Informatics University of Padova Padova Italy Necsy Network Control Systems S.p.A. Padova Italy

A multi-output quasi-resonant converter suitable for applications up to several hundreds of Watts is presented. It employs a zero-current-switched full-wave push-pull structure, which allows good cross-regulation of the output voltages, high power density and full exploitation of the transformer core. After an analysis of operation, design criteria are given and experimental results of a three-output, 100 W industrial prototype for telecom applications are reported.< >

关键词： DC-DC power converters Switches Power transformer insulation Transformer cores Capacitors Magnetic resonance Circuit topology Telecommunications Switching frequency Voltage

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