Fault Diagnosis Method of Equipment based on Multi-information Fusion

摘要

The traditional fault diagnosis method is completely based on the fault symptom without considering failure rate,so the fault diagnosis accuracy is not ideal.To improve the correctness rate of fault diagnosis,the paper proposes a fault diagnosis method of equipment based on failure rate and fault symptom.Firstly,an algorithm for calculating the equipment failure rate is proposed based on Weibull distribution model;Secondly,the probability of fault existence is evaluated based on fault symptom;Thirdly,a new fault diagnosis model is herein presented based on fault rate and fault symptom;Finally,the method is proved to be applicable through an example.The method takes failure rate,fault mechanism,fault symptom,difficulty degree of symptom acquisition and other factors into consideration,so the fault diagnosis accuracy is improved greatly.