论文部分内容阅读
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.
A strategy and method for reconfigurable manufacturing unit fault recovery are proposed. When the fault occurs, local and temporary modifications can be made to the supervisory controller in the form of Petri nets for normal operation control to achieve fault recovery Firstly, an improved network rewriting system is proposed, which can be used to dynamically change the Petri net model structure.Then, a fault recovery method based on an improved network rewriting system is proposed, in which an improved network rewriting system is used for operation and guidance of Petri nets The controller is monitored from the wrong state to the correct state, and the structure and expected attributes of the supervisory controller remain unchanged after fault recovery.Finally, an example is given to demonstrate the application of this fault recovery method, which proves the effectiveness of the method.