Hierarchical control of flexible assembly systems for product families using object oriented Petri nets

This paper is a logical pursuit of our investigations in modelling and control research of flexible assembly systems with object oriented Petri nets. In our previous work (1993), we presented a methodology of operating process control which concerns subassemblies. The subassembly management included input generic planning of product families and output product families. We also developed a method of how to manage generic planning with process sequencing. Indeed, this step is the static study of flexible assembly systems. The aim of the present paper is to show how to structure the dynamic part of the system, from the input parts and resources of manufacturing up to the assembled product output to the customers.