This paper describes methods based on Petri nets analysis techniques for constructing a supervisory controller of discrete event dynamic systems. Two methods (method based on reachability tree analysis and on-line met...
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This paper describes methods based on Petri nets analysis techniques for constructing a supervisory controller of discrete event dynamic systems. Two methods (method based on reachability tree analysis and on-line method based on matrix equations) have been designed. Programs in C++ have been written to solve supervisory control problem and real time control of a discrete event dynamic system.
作者：
B. HrúzA.J. NiemiT. VirtanenSlovak Technical University
Faculty of Electrical Engineering and Information Technology Department of Automatic Control Systems Ilkovicova 3 812 19 Bratislava Slovak Republic phone: +42 -7-791698 Helsinki University of Technology
Department of Information Technology Control Engineering Laboratory Otakaari 5A FIN-02150 Espoo Finland phone: +358-0-4513334
An approach using Petri nets to modelling and control of flexible manufacturing systems (FMS) is worked out in the paper. A class of Petri nets suitable for the modelling of FMS and for the design of their control is ...
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An approach using Petri nets to modelling and control of flexible manufacturing systems (FMS) is worked out in the paper. A class of Petri nets suitable for the modelling of FMS and for the design of their control is formulated. In the Petri net models not only conflicts due to mutual exclusions of the shared system resources but conflicts of branching operations are analyzed and solved, as well. Models of FMS suitable for system performance analysis and control design are built up of a set of elementary building blocks proposed in the paper. Analysis, modelling method and control design is developed on the background of a pilot experimental FMS developed at the Helsinki University of technology.
The principal aim of this paper is to present a new algorithm for the control of continuous time linear systems with a large relative degree and unknown parameters. If the standard approach is used for these systems, ...
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The principal aim of this paper is to present a new algorithm for the control of continuous time linear systems with a large relative degree and unknown parameters. If the standard approach is used for these systems, the controller structure is very complicated and implementation is problematic. A comparative study of two classes of model reference adaptive control methods is also presented. Finally, simulation results are also presented to illustrate the effectiveness of the proposed method.
作者：
FUJIWARA, ETANAKA, TMemberFaculty of Engineering
Tokyo Institute of Technology Tokyo Japan 152 Eui Fujiwara:received his B.S. and M.S. degrees in Electronics Engineering in 1968 and 1970
respectively and his Dr. of Eng. degree in 1981 all from Tokyo Institute of Technology. In 1970 he joined the NTT Musashino Electrical Communication Laboratories and engaged in developing PIPS-1 and PIPS-11 computer systems. In 1988 he joined the Department of Computer Science Tokyo Institute of Technology as an Associate Professor. In 1990 he became a full Professor. He was a Visiting Professor at the Center for Advanced Computer Studies the University of Southwestern Louisiana from June 1985 to July 1986. His current research interests include coding theory for computers fault-tolerant memories VLSI defect-toleranceand WSI systems. He is a co-author ofError Control Coding for Computer Systems(Prentice-Hall1989) EssentiaLF of Error-Correcting Coding Techniques (Academic Press 1990) and other books. Dr. Fujiwara received the Young Engineer Award from the I.E.I.C.E. in 1978 and the Teshima Memorial Research Award in 1991. He is a senior member of the IEEE and a member of the Information Processing Society Japan. Associate Member
Because of its capability of high-speed search, the associative memory (CAM) is expected to be used in a variety of information processing systems. In this paper, novel fault-tolerant techniques which are effective fo...
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Because of its capability of high-speed search, the associative memory (CAM) is expected to be used in a variety of information processing systems. In this paper, novel fault-tolerant techniques which are effective for on-line use are proposed for TLB which is an example of the application of CAM. First, fault and error models of the TLB consisting of the CAM part and the SRAM part are clarified. Then, the fault-tolerant techniques for these faults and errors, such as distance separable technique, cod-ing technique, simplified 1-out-of-n check and graceful degradation, are proposed. The distance separable technique which encodes the data stored in the CAM part is the one which masks the faulty CAM part and prevents errors from propagating to the subsequent circuits. The coding technique checks the one-to-one correspondence between the data in the CAM and those in SRAM by using the SEC-DED code with byte error detection capability, i.e., SEC-DED-SbED code, and at the same time it detects and corrects errors in the data stored in SRAM. The simplified 1-out-of-n check processes association errors. The graceful degradation gives a flag in the faulty memory section and prevents it from being used. The methods proposed in this paper are evaluated from area augmentation and error detection capability perspectives. The results show that the fault-tolerant TLB with 32 virtual address bits, 32 physical address bits and 128 entries gives single fault detection probability of nearly 99 percent with 28 percent area increase.
作者：
M. HubaSlovak Technical University
Department of Automation and Control Faculty of Electrical Engineering and Information Technology SK-812 19 Bratislava
This paper deals with the pole assignment controller design under consideration of the control signal saturation. The controller synthesis developed for the double integrator plant is based on the decomposition of the...
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This paper deals with the pole assignment controller design under consideration of the control signal saturation. The controller synthesis developed for the double integrator plant is based on the decomposition of the 2nd order dynamics into two particular 1st order movements witch enables, together with the newly introduced geometrical interpretation of closed loop poles, an easy handling of saturation effects and yields a simlpe explicite controller fully respecting the given saturation limits. So, the specification of the closed loop poles can be made quite indipendently from the saturation effect, i.e. they only have to respect different parasitic effects like quantization and measurement noice, neclected dynamics, etc. It gives to the designer a new “degree of freedom” in comparing with the “linear” pole assignment controllers, where this choice has to take into account also the allowed control signal amplitudes.
AC excitation schemes of a brushless self-excited type three-phase synchronous machine are presented. The rotor field winding of the machine is short-circuited with the diode, and an exciter or other exciting equipmen...
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AC excitation schemes of a brushless self-excited type three-phase synchronous machine are presented. The rotor field winding of the machine is short-circuited with the diode, and an exciter or other exciting equipment is not required in this machine. The two excitation schemes proposed have the advantage of reducing the torque ripple as compared to the scheme which superimposes a singular rotating field with different speeds from the positive-phase-sequence field. This confirmed by the simulation. Experimental results are also given.< >
This book constitutes the thoroughly refereed post-workshop proceedings of the 7th International Workshop on Agents and Data Mining Interaction, ADMI 2011, held in Taipei, Taiwan, in May 2011 in conjunction with AAMAS...
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ISBN:
(数字)9783642276095
ISBN:
(纸本)9783642276088
This book constitutes the thoroughly refereed post-workshop proceedings of the 7th International Workshop on Agents and Data Mining Interaction, ADMI 2011, held in Taipei, Taiwan, in May 2011 in conjunction with AAMAS 2011, the 10th International Joint Conference on Autonomous Agents and Multiagent Systems.;The 11 revised full papers presented were carefully reviewed and selected from 24 submissions. The papers are organized in topical sections on agents for data mining; data mining for agents; and agent mining applications.
The research of holonic and agent-based systems is developing very rapidly. The community around this R&D topic is also growing fast - despite the fact that the real-life practical implementations of such systems ...
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ISBN:
(数字)9783642036682
ISBN:
(纸本)9783642036668
The research of holonic and agent-based systems is developing very rapidly. The community around this R&D topic is also growing fast - despite the fact that the real-life practical implementations of such systems are still surprisingly rare. H- ever, the managers in different branches of industry feel that the holonic and agent-based systems represent the only way of managing and controlling very c- plex, highly distributed systems exploring vast volumes of accumulated knowledge. The relevant research and development activities gain more and more visible support from both industry as well as public sectors. Quite naturally, the number of scientific events aimed at the subject field is also growing rapidly. We see new lines of conf- ences like INDIN, we observe a strong focus of the already well-established conferences, e. g. , INCOM or ETFA, being shifted toward holonic and agent-based manufacturing systems. We see an increased interest of the IEEE System, Man and Cybernetics Society, especially its Technical Committee on Distributed Intelligent Systems which leverages the experience gathered by the members of the former Ho- nic Manufacuting Systems (HMS) consortium. We see a clear orientation of the IEEE SMC Transactions, part C, toward applications of agent-oriented solutions. The same is true of the International Journal on Autonomous Agents and Multi-Agent Systems (JAAMAS). This is a really good sign of the increasing importance of the field.
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