Intelligent Error Recovery in Flexible Production Systems

Emmanuel D. Adarnides, Ekaterin C. Yamalidou, and Dominique Bonvin

Real time failure recovery planning in flexible production systems is considered at the process level. Initially, the problem is structured and formulated within a systemic framework, and then, a generic roll-forward recovery approach that uses the process’s dynamic model, as well as general production knowledge, is proposed. The Colored Timed Petri Net formalism is used to represent, in a modular and compact way, the process discrete-event dynamics. In connection with this, an intelligent opportunistic recovery technique for finding, in real time, the recovery trajectory that conforms best within a specific operational strategy, is proposed. The application of the approach is demonstrated by considering cases taken from the chemicals batch-processing industry.

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