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应用Ｐｅｔｒｉ网对系统逻辑关系进行建模，并利用其可达性概念和状态方程来解决故障检测与诊断问题，方法简单易行。以实例说明基于Ｐｅｔｒｉ网的故障诊断的实现。
Petri nets are used to model the system logical relations, and their reachability concepts and state equations are used to solve the problem of fault detection and diagnosis. The method is simple and easy to implement. An example is given to illustrate the realization of fault diagnosis based on Petri net.