基于动态观测的随机离散事件系统故障诊断

近年来,离散事件系统故障诊断研究引起国内外学者广泛关注.鉴于此,研究动态观测下随机离散事件系统的故障诊断.首先引入一种动态观测,使事件的可观测性随着系统的运行而动态变化;然后分别对基于动态观测的随机离散事件系统的单故障可诊断性和模式故障可诊断性进行形式化;最后通过构造相应的诊断器,分别得到关于单故障可诊断性和模式故障可...

Failure diagnosis of stochastic discrete event systems based on dynamic observations

In recent years, the research on failure diagnosis of discrete event systems(DESs) has attracted the attention of many scholars. This paper studies failure diagnosis of stochastic DESs under dynamic observation. Firstly, a kind of dynamic observation is introduced to make the observability of events change dynamically with the operation of the system. Then, the diagnosability of single-failure events and pattern-failure events for stochastic DESs based on dynamic observation are formalized. The necessary and sufficient condition of diagnosability of single-failure and pattern-failure events is obtained by constructing the corresponding diagnoser automata, and failure diagnosis of stochastic DESs under dynamic observation is realized.