基于证据理论的电子装备故障诊断

Fault Diagnosis of Electronic Equipment Based on Evidence Theory

基于证据理论的电子装备故障诊断,采用信任函数作为不确定性度量工具。首先建立基本概率赋值,然后计算信任函数,最后按照一定的组合规则作出决策。其运用信度函数表达概率大小,通过多诊断设备测试被诊断对象,得出属于各类故障的信度函数。再利用组合规则进行信息融合,得到融合后症状分别属于各类故障的信度函数。最后确定故障类型。

Fault diagnosis of electronic equipment based on evidence theory, the trust function is adopted as uncertainty measurement tool. At first, the basic probability assignment is established; then, the trust function is calculated; at last, the decision is made according to some combination rule. The trust function is used to describe the probability; based on multi-diagnosis equipment to test diagnosis objects, the trust functions of every kind fault are acquired, Then, the combination rule is adopted to carry out the information fusion; after fusion, the symptoms are owned by trust function of different faults separately. At last, the fault types are ensured.