Decentralized implementation approach of control synthesis of manufacturing systems

This paper presents a decentralized approach for implementation of controller synthesized by supervisory Control Theory. It is based on a synthesis algorithm and a modular modeling of the plant to avoid combinatory explosion found in centralized structure. Firstly, from the local Plant Elements, local constraints are defined to build local supervisors. Local constraints restrict the system behavior within a desired specification. Secondly, global constraints are user to establish a global supervisor able to coordinate between local supervisors. These different elements for control are translated in a normalized language for implementation in a Programmable Logic Controller. The approach is illustrated using a benchmark.