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Projection-Based Coordination Control of Automated Manufacturing Systems

This paper presents the design and implementation of automata-based supervisors of a hierarchical and modular coordination architecture for a prototype automated manufacturing system (AMS). Models for each layer are built using industrial standards. Semantic consistency between adjacent layers is maintained by including in the upper layer transitions modeling the lower layer operational status. These transitions are used as the projection alphabets. The modularity of the architecture is exploited to guarantee global controllability.