MODELING AND ANALYSIS OF RECONFIGURABLE MANUFACTURING SYSTEM BY EXTENDED STOCHASTIC PETRI NETS
Nan Xie · Journal of Mechanical Engineering · 2006
Reconfigurable manufacturing system(RMS)em- phasizes quick reaction to market changes,whose components are reconfignrable structures.The modeling and analysis of such system are extremely difficult to develop.A modular modeling approach based extended stochastic Petri nets(ESPN)is pre- sented,which facilitates the reconfigurable processing model- ing and adapts the arbitrary distributions manufacturing system accurately.The RMS model is described by connecting a set of basic modules that are designed with respect to different re- sources and reconfignrable processing of operations;Their connection method is also provided.Furthermore,the analysis of ESPN model based on behavior expression is presented,and the performance measures of RMC are computed such as pro- duction rates versus the number of standby machines,part type mix ratio,and rump-up time.In addition,the relationship func- tion of performance can be easily obtained without the reach- ability graph of Petri nets.Thus,the analysis process is simple and straightforward.An example ofa DC motor reconfignrable production line is presented to illustrate the effectivity of the methodology.