一种面向功能的分层高效故障诊断算法

Oriented Function Hierarchical Structure for Fault Diagnosis of Complicated Systems

随着系统复杂程度的增加 ,如何快速、准确地确定系统故障的位置一直是该领域的研究热点 .实现的一种面向功能的分层诊断算法 ,能较显著地减少对复杂系统故障进行诊断的时间 ,又具有较高的故障定位精度 .其基本思想是先完成对系统基本功能模块的封装和构造 ,在此基础上 ,算法先在功能级上对系统进行故障诊断 ,当确证某功能模块包含故障时 ,再对其进行再分层诊断 ,以此循环 ,直到检测到故障为止 .讨论了该算法的实现过程 ,并与其他方法进行了比较 .

An effective algorithm for fault diagnosis should have some advantages, such as the small processing time and precise location for faults. An oriented function hierarchical structure model was presented and discussed. The basic ideas are that the fault diagnosis are processing based on the functions of systems, and the free-fault modules are propagated through the highest possible level, or go to the lower level of hierarchy if there are faults in this module. The experiments of comparison with other methods show that this algorithm has more effective advantages in simulations.