NDLI: Distributed fuzzy control of flexible manufacturing systems

Content Provider	IEEE Xplore Digital Library
Author	Angsana, A. Passino, K.M.
Copyright Year	1993
Abstract	A flexible manufacturing system (FMS) consists of a set of machines that are connected via tracks over which parts may be transported from one machine to another for processing. As parts arrive at a machine via the tracks, they are put in a buffer (queue) where they are held before they are processed. There is a local controller (scheduling policy) at each machine which uses the machine's buffer levels to decide which part type to process next; hence the overall controller for the FMS is physically distributed across the entire FMS with local schedulers at each machine. In this paper the authors show how to design a fuzzy controller for a single machine and show via simulation that its performance is comparable to conventional schedulers. In addition, the authors introduce an adaptive fuzzy controller which can automatically synthesize itself (or tune itself if there are machine parameter variations) to achieve good throughput rates for the single machine as compared with conventional schedulers. Next it is shown via simulations that by using such adaptive fuzzy controllers in a distributed fashion, one obtains a distributed fuzzy controller (DFC) which can automatically synthesize itself and lower the maximum buffer level more effectively than conventional schedulers. Finally, the authors illustrate the ability of the DFC and conventional schedulers to automatically tune themselves in case there are unpredictable machine parameter changes in an FMS. These final results show that while sometimes the DFC performs in a superior fashion, better scheduling policies are needed to guarantee high performance FMS operation in case there are unpredictable machine parameter changes.<>
Sponsorship	IEEE Control Systems Society
Starting Page	423
Ending Page	435
Page Count	13
File Size	1375871
File Format	PDF
ISSN	10636536
Volume Number	2
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fuzzy control Flexible manufacturing systems Job shop scheduling Single machine scheduling Automatic control Digital-to-frequency converters Programmable control Adaptive control Distributed control Throughput
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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