Design of Optimal Petri Net Supervisors for Flexible Manufacturing Systems via Weighted Inhibitor Arcs

Document Type

Article

Publication Date

1-1-2018

Abstract

This paper develops an approach to the design of an optimal Petri net supervisor that enforces liveness to flexible manufacturing systems. The supervisor contains a set of observer places with weighted inhibitor arcs. An observer place with a weighted inhibitor arc is used to forbid a net from yielding an illegal marking by inhibiting the firing of a transition at a marking while ensuring that all legal markings are preserved. A marking reduction technique is presented to decrease the number of considered markings, which can dramatically lower the computational burden of the proposed approach. An integer linear program is presented to simplify the supervisory structure by minimizing the number of observer places. Finally, several examples are used to shed light on the proposed approach which can lead to an optimal supervisor for the net models that cannot be optimally controlled via pure Petri net supervisors.

Identifier

85029481068 (Scopus)

Publication Title

Asian Journal of Control

External Full Text Location

https://doi.org/10.1002/asjc.1583

e-ISSN

19346093

ISSN

15618625

First Page

511

Last Page

530

Issue

1

Volume

20

Grant

61673309

Fund Ref

National Natural Science Foundation of China

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