基于改进的网重写系统途径的可重构制造单元故障恢复(英文)  

Reconfigurable manufacturing cell error recovery:an approach based on improved net rewriting systems

作　　者：李俊[1] 戴先中[1] 孟正大[1] 窦建平[2] 

机构地区：[1]东南大学自动化学院,江苏南京210096 [2]东南大学机械工程学院,江苏南京210096

出　　处：《控制理论与应用》2010年第2期199-204,共6页Control Theory & Applications

基　　金：supported in part by the China Postdoctoral Science Foundation Funded Project(20080431052)

摘　　要：提出了一种用于可重构制造单元故障恢复的策略与方法,允许故障发生时,通过对用于正常操作控制的Petri网形式的监督控制器进行局部、临时性的修改,实现故障的恢复.首先,提出改进的网重写系统,可用于动态改变Petri网模型结构.然后,提出了基于改进的网重写系统的故障恢复方法,其中改进的网重写系统用于操作、引导Petri网监督控制器由错误状态进入正确状态.故障恢复后监督控制器的结构与期望属性维持不变.最后,以实例演示了该故障恢复方法的应用,证实了方法的有效性.The strategy and method for recovering an error occurring in a reconfigurable manufacturing celI（RMC） are proposed by a partial and temporary modification on the supervisor in Petri net（PN） formalism for normal operation control. Firstly, the improved net rewriting system （INRS） is presented that offers a direct way to dynamical structural changes in a PN model. Subsequently, an INRS-based error recovery method is presented, where the INRS is used to operate a PN supervisor and induct it into a correct state from the error one. After error recovery the structure and expected properties of a resulting supervisors is naturally preserved. Finally, with help of an example, the error recovery method presented is illustrated and the result shows the validity of the method.

关 键 词：故障恢复 PETRI网 网运算 可重构制造系统 监督控制 

分 类 号：TH165.3[机械工程—机械制造及自动化]