HIERARCHICAL MODELING AND CONTROL OF FLEXIBLE ASSEMBLY SYSTEMS USING OBJECT-ORIENTED PETRI NETS

This paper presents results of the hierarchical modelling of flexible assembly systems (FAS) control with object-oriented Petri nets (OPN). Control approaches using coordination architecture, and tools to perfo rm them are outlined. The paper discusses the hierarchical decompositi on of assembly systems for products families using a generic and polym orphic object approach and the reuse of these object libraries to perf orm step by step the final system model, The use of objects and Petri net subsystems with more or less autonomy for subsystem behaviour mode lling provides a new way of manufacturing systems modelling in a CIM a rchitecture, and for assembly systems in particular.