基于电路功能的分区诊断故障字典法

A method of circuit fault diagnosing dictionary based on circuit function and fault region location

本文提出了一种基于电路功能分区诊断并建立直流故障字典,分步实施故障定位的电路故障诊断方法。该方法是在构成整个直流故障字典时,通过对电路的分析并结合对故障字典的计算机辅助分析,按电路功能将故障字典划分为若干个相互独立的故障小字典,对应不同的电路区域。实时诊断中先故障区域再故障元件,分步实施故障定位,减少了测试点,提高了实时故障诊断的效率。

In the present paper,a method of analogue circuit fault diagnosing which is carried out by generating and dividing the fault dictionary according to circuit function and locating the fault components step by step is introduced. After the fault dictionary of the whole circuit is created,we divide it into several small fault dictionaries according to the analysis of the circuit function and the computer simulation results. Every small dictionay correspond to a special region of components in the circuit. In real-time testing,the fault component will be found through two steps：first ,the fault component region,then the fault component. Since the number of nodes to test is cut down,the efficiency of real-time diagnosing is raised.