故障传播有向图的故障定位研究

摘要

电路的故障诊断在实际工程应用中占有重要地位,而故障定位是电路故障诊断的主要内容.对故障定位的方法进行了详尽的研究.首先建立故障传播有向图,获取邻接矩阵;然后依据Warshall算法求得可达矩阵;最后将层次性分解技术、约束传播技术和中间寻优技术相结合对电路进行故障定位,实现了电路的故障诊断.应用结果表明,该方法方便、快速、可行,对复杂系统效果尤其明显.%The fault diagnosis for electronic circuitry is very important in practical engineering applications, while fault localization is the main content of fault diagnosis of circuitry, thus the fault localization is studied. The directional graphic of fault propagation is established , and the adjacency matrix is obtained; in accordance with Warshall algorithm, the reachable matrix is derived. Finally the technologies of hierarchical decomposition, constraint propagation, and intermediate optimization are combined to locate the circuitry fault for implementing fault diagnosis.The result of application indicates that this method is easy, rapid, and feasible, its better effects will be obtained for complex systems.