机械科学与技术2017，Vol.36Issue(1)：23-28,6.DOI:10.13433/j.cnki.1003-8728.2017.0103
改进FMEA与故障传播模型混合故障诊断方法
Integrated Fault Diagnosis Method based on Improved FMEA and Failure Propagation Model
摘要
Abstract
In order to solve the co-existence problem of both various fault modes and causes in the electromechanical systems,an integrated fault diagnosis method based on improved FMEA (Failure mode and effect analysis) and failure propagation model is proposed.Firstly,by analyzing the failure modes and failure causes,the contribution rate of each failure cause to the corresponding failure mode can be obtained.And then,the failure propagation model is applied to deduce the fault diagnosis reasoning and to calculate the occurrence probability of each failure mode.Furthermore,the value of risk extended number (REN) is set to [0,1] and used to measure the severity and detectability of the failures.Finally,the key components of electromechanical systems and their failure modes are obtained by comparing the occurrence probability and REN value.The proposed method provides a theoretical approach for making maintenance policy.Case study of a leveling system is illustrated,the results show that the proposed approach can be used to guide the reliability analysis and maintenance decision-making for electromechanical system.关键词
改进FMEA/故障传播模型/故障诊断/风险扩展数Key words
failure modes/failure propagation model/fault diagnosis/reliability analysis分类
机械制造引用本文复制引用
张红旗,邵晓东,苏春,柳纯..改进FMEA与故障传播模型混合故障诊断方法[J].机械科学与技术,2017,36(1):23-28,6.基金项目
陕西省自然科学基础研究计划重点项目(2014JZ016)资助 （2014JZ016）
