Failure modeling and process monitoring for flexible manufacturing systemsusing colored timed Petri nets

The performance of a flexible manufacturing system (FMS) depends on the equ ipment efficiency and process control. In order to increase the equipment e fficiency, the failure mode analysis and fault diagnosis can be used to red uce the frequency of unexpected breakdowns of machines. In addition, the st atistical process control (SPC) can be used for adjusting the process param eters to eliminate process variations. In this paper, a colored timed Petri net (CTPN) is used to model the process behavior of an FMS. In addition, t he CTPN-based SPC, fault diagnosis, and failure model and effect analysis a re modeled and analyzed individually, Especially, all of the modular models are integrated and linked based on the CTPN, Due to the unified CTPN model ing, the information of each modular model in the entire system can be exch anged and integrated directly and efficiently, Finally, the entire CTPN FMS models are implemented using G2 real-time expert system. Consequently, the proposed CTPN-based simulator can be acted as a real-time PMS monitor and controller through the G2 standard interface.