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Journal of the Brazilian Computer Society

Print version ISSN 0104-6500On-line version ISSN 1678-4804

Abstract

BARROS, Tomaz C.; FIGUEIREDO, Jorge C.A. de  and  PERKUSICH, Angelo. A Fault Tolerant Colored Petri Net Model for Flexible Manufacturing Systems . J. Braz. Comp. Soc. [online]. 1997, vol.4, n.2, pp.-. ISSN 1678-4804.  https://doi.org/10.1590/S0104-65001997000300002.

This paper introduces an approach based on Colored Petri Nets (CPN) to systematically introduce fault-tolerance in the design of a supervisor for a Flexible Manufacturing System (FMS). The system is modeled by means of Place/Transition nets and then is structurally reduced, resulting in a CPN that is independent of a specific production route. The introduction of fault tolerance in the design of such a supervisor considers both forward recovery and backward recovery. For forward recovery we anticipate faults in resources in a production route and reschedule the production routes for production orders before the faulty resource is reached. The backward recovery is considered at the level of a resource in such a way that when a faulty resource is fixed, the operation restarts on the last consistent operation executed

Keywords : Fault Tolerance; Forward Recovery; Backward Recovery; Flexible Manufacturing Systems; Colored Petri Nets.

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