可能度理论在FMEA灵敏度分析中的应用

发布时间：2018-06-02 12:29

本文选题：失效模式与影响分析(FMEA) + 灵敏度分析　；参考：《中国安全科学学报》2016年09期

【摘要】：为解决传统失效模式与影响分析(FMEA)中风险顺序数(RPN)计算的模糊性和不确定性问题,避免其排序混乱,并始终能关注关键的故障模式,提出基于可能度理论的失效模式改进优先等级排序方法,并对FMEA的灵敏度进行分析。由于发生度、严重度及探测度3个属性的权重及其属性值直接影响排序结果,基于互换性理论中上下偏差的思想,求取可能度理论下属性权重的稳定区间;分别对传统RPN和可能度理论下的FMEA进行属性值敏感性分析,给出相应的算法,并得到各决策方法下属性值的稳定区间。以某柴油机变速器输出轴的FMEA为例,验证该方法的有效性。结果表明,该方法有助于确定零部件失效模式改进的优先顺序,可以增强排序结果的坚稳性。
[Abstract]:In order to solve the fuzziness and uncertainty of the calculation of the risk sequence number (RPN) in the traditional failure mode and influence analysis (FMEA), avoid the confusion of its sort, and always pay attention to the key fault mode. The method of improving the priority ranking of the failure mode based on the possibility theory is proposed, and the sensitivity of the FMEA is analyzed. The weight of 3 attributes and its attribute values directly affect the ranking results. Based on the idea of the upper and lower deviations in the interchangeability theory, the stability interval of the attribute weight under the possibility theory is obtained. The sensitivity analysis of the attribute value of the FMEA under the traditional RPN and the possibility theory is analyzed, and the corresponding algorithms are given, and the decision-making parties are obtained. An example of the FMEA of a diesel transmission output shaft is taken as an example to verify the effectiveness of the method. The results show that the method is helpful to determine the priority order of the improvement of the failure modes of parts and components and enhance the stability of the ranking results.
【作者单位】：江西理工大学机电工程学院;
【基金】：国家自然科学基金资助(61164009,61463021) 江西省教育厅科学技术研究项目(GJJ14420) 江西省青年科学家培养对象计划项目(20144BCB23037)
【分类号】：TK423

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