Robust Control of Flexible Assembly Systems Based on Petri Nets
We concentrate on the robust deadlock control problem of flexible assembly system(FAS)with unreliable flexible assembly system to ensure that the system should resume normal production without blocking when the faulty resources are recovered,i.e.,not only can the system be kept away from deadlock in the absence of faulty resources,but also ensure the smooth production of the system in the presence of unreliable resources.Firstly,the Petri net model with unreliable resources FAS is established to simulate the operation of the whole system and the failure and recovery of resources.Secondly,according to the control objective of the system,a deadlock avoidance strategy satisfying the robustness is designed by the proposed process advanceable algorithm and the improved banker's algorithm,and then two examples are used to validate the validity of the designed robust control strategy.Finally,comparative experimental results show that the number of reachable identifiers obtained by the deadlock control strategy proposed is 30 710,which is significantly more than that of strategies of other papers,and is superior in terms of permissibility.
万方数据
维普
