变权重模糊综合评判模型及其在故障诊断中的应用

Varying Weight Model of Fuzzy Comprehensive Evaluation and Its Application in Fault Diagnosis

针对大型复杂系统故障诊断中的权重变化问题 ,提出和定义了变权重模糊综合评判模型 ;在模糊综合评判过程中 ,各评判因素对于不同评判等级具有不同权重的问题在新模型中得到恰当的描述 ,从而使大型复杂系统故障诊断的精度得到实质性的提高。故障诊断实例表明 ,变权重模糊综合评判模型对于解决实际问题是有效的 。

Aiming at the low accuracy of fault diagnosis when the weight of fault symptoms is varying with the fault types in complex systems,the author proposes a new concept of varying weight model of fuzzy comprehensive evaluation.In the course of fuzzy comprehensive evaluation,the varying weight model of comprehensive evaluation can correctly characterize the weight of fault symptoms varying with the fault types in complex systems.So the definition of evaluation results is promoted evidently.The examples of the varying weight model in fuzzy fault diagnosis show that the original idea is feasible to solve practical problems,and the results are better than that of applying changeless weight model.