摘要
研究了基于故障传播模型的故障诊断方法,并将其应用于飞机电源系统,建立了故障诊断模型,用Warshall算法实现了邻接矩阵到可达矩阵的转换,采用改进的CWSE-Tree算法产生候选诊断,最后利用基于贝叶斯理论的方法计算得到候选诊断的后验概率,由此确定检修的先后顺序。结果表明,根据该检修顺序进行检测可以快速而准确的定位故障,具有一定的应用和参考价值。
The method of diagnosis based on fault propagation graph was researched, and applied to aircraft power supply system. Diagnostic model was created, and the Warshall Algorithm was used to transfer the adjacency matrix to reachability matrix, and the modified CWSE- Tree algorithm was adopted to calculate candidate diagnostic. Finally, the method based on Bayesian theory was used to calculate the posterior probability of the candidate diagnosis. According to the result, the sequence of maintaining could be choosed. The result shows that faults could be located efficiently and accurately,also it has a certain application and reference Value.
出处
《机械与电子》
2012年第9期7-11,共5页
Machinery & Electronics
基金
国家自然科学基金资助项目(60572173)
关键词
基于模型诊断
故障诊断
故障传播图
飞机电源系统
model - based diagnosis
fault diag- nosis
fault propagation graph
aircraft power supply system
