复杂电子系统测点与诊断策略的优化方法

针对复杂电子系统故障诊断知识获取过程中测试节点和诊断策略的确定问题,提出了一种可行的工程方法。该方法利用系统的分层结构模型的可达矩阵计算节点对应的故障隔离权值,通过选择权值大的节点对矩阵进行分割,找到最优故障隔离节点。通过计算节点提供的信息量,确定最佳测试节点,最终确定最优故障诊断策略。它是基于仿真技术的故障知识获取方法研究中实现高效、准确、快捷的故障征兆获取的关键技术;也是在实际诊断过程中实现快速准确利用知识、确定故障部件的关键技术。给出了主要步骤,并通过实例进行了验证。

Efficient algorithm for test-node and diagnosis strategies of a complex electronic system

A feasible engineering method is put forward to determine the test nodes and diagnosis strategies of complex electronic systems in the process of fault diagnosis knowledeg acquisition. Using the hierarchical models of electronic systems, the matrixes of fault location are established. By calculating the fault diagnosis priorities of nodes that can be used to divide the matrixes, the best fault isolation nodes are found; and by calculating the quantity of information of nodes, the best test nodes are determined. Finally, the best diagnosis strategy is determined. It is a key technology for realizing efficient, correct and fast failure symptom acquisition in the study of fault diagnosis knowledge acquisition based on simulation technology. It is also a key technology for realizing quick and correct knowledge utilization and determining faulty units in the process of fault diagnosis. The main steps of the method are provided, and the method is validated by an example.