NDLI: Stable fault adaptation in distributed control of heterarchical manufacturing job shops

Content Provider	IEEE Xplore Digital Library
Author	Prabhu, V.V.
Copyright Year	1989
Abstract	In this paper, a control theoretic model is developed for analyzing the dynamics of distributed cooperative control systems for manufacturing job shops with multiple processing steps with parallel dissimilar machines in which parts control their release times autonomously. The model allows an arbitrary number of part types to be produced using an arbitrary number of machines with an arbitrary number of alternate routings. Conditions for global stability of the resulting distributed control system with nonlinearities are shown using results from Lyapunov stability theory. System stability is found to be robust to a variety of faults and disturbances that may be encountered in a manufacturing environment as long they are bounded in the mean. Feedback enables implicit adaptation to faults in real time, which allows the flexibility in the systems to be fully utilized to compensate for faults and disturbances. Numerical simulation experiments are used to illustrate the global stability and the distributed fault adaptation capability of the system without requiring explicit notification or compensation to conditions such as machine deterioration, multiple machine failures, and network communication delays. Simulation results for job shops with 2000 parts are also presented to illustrate the scalability of the approach.
Starting Page	142
Ending Page	149
Page Count	8
File Size	447371
File Format	PDF
ISSN	1042296X
Volume Number	19
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-02-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Distributed control Robust stability Control system synthesis Manufacturing processes Pulp manufacturing Virtual manufacturing Routing Lyapunov method Feedback Real time systems
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering

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