电路故障诊断的方法

An Approach to the Fault Diagnosis of Electric Circuit

讨论电路的故障诊断 ,主要是对模拟电路的故障激励法进行分析 .电路中故障的实质是电器元件参数的变化 ,远远偏离标准值 .故障诊断是通过检测电路端口电压、电流的变化 ,判断电路内中哪些元件发生了变化 .由于这一变化是由故障元件引起的 ,因此可以把它看作是一特定的响应 .故障激励法是将故障引起的这一响应等效为网络内故障的激励 ;把故障造成变化的响应看作是特定的激励 .

This paper discusses the diagnostic methods of el ec tric circuit fault on the basis of analyzing the fault excitation of analog ci rcuits. In substance, electric circuit fault results from the departures of circ uit element parameters away from their typical values. Variational element param eters can be detected by measuring the variations of the voltage and current val ues on circuit ports, which are considered as the response to element fault in t he network.