D-S证据理论在航空发动机故障诊断中的应用研究

Application of D-S Evidential Reasoning to the Fault Diagnosis of Aviation Engine

从证据合成的基本理论出发,对航空发动机多故障的判断和区分问题进行了分析和探讨。研究利用多征兆的信息,进行全局信息融合,从而获得更为准确的故障定位。最后通过一个应用实例说明D—S证据理论能有效的用于复杂系统的综合故障诊断中,得出更为准确的故障信息。

Starting from the basic theory of evidence combination, the paper analyse the problem of aviation engine of differentiation and estimation to multiple-fault machine. More correct diagnosis results can be obtained by fusing part or full range information adopting the combining rules of evidence theory. At last the test by the actual example show D-S evidential reasoning method can be used in comprehensive fault diagnosis of complex system, and can make the judgemore correctly.