%0 Journal Article
%T 改进FMEA与故障传播模型混合故障诊断方法<br>Integrated Fault Diagnosis Method based on Improved FMEA and Failure Propagation Model
%A 张红旗
%A 邵晓东
%A 苏春
%A 柳纯
%J 机械科学与技术
%D 2017
%X 针对机电产品多种故障原因和故障模式并存问题，在常规故障模式及其影响分析（FMEA）基础上，提出了一种改进FMEA与故障传播模型混合故障诊断方法。分析系统常见故障模式及其故障原因，确定每种故障原因对当前故障模式的贡献率；根据故障传播模型进行故障模式推理，计算每种故障模式的发生概率；采用[0，1]区间的概率值来度量故障的严重度和检测度，得到风险扩展数（REN）；通过比较每种故障模式的发生概率和REN值，确定系统关键部件及其主要故障模式，为系统维修策略的制定提供理论依据。计算分析结果表明，该方法能有效识别系统的主要故障模式和关键零部件，并与工程实际相吻合。<br>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
%K 改进FMEA
%K 故障传播模型
%K 故障诊断
%K 风险扩展数&lt
%K br&gt
%K failure modes
%K failure propagation model
%K fault diagnosis
%K reliability analysis
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6596.shtml