定量危害性矩阵分析方法研究

危害性矩阵分析中,由于同一个严酷度类别在矩阵图中是一个区间,容易出现当几个故障模式的严酷度相同时,在矩阵图中无法精确标识,从而使得得出的危害度有偏差.同时,利用作图法,分析效率较低.本文首先对目前的危害性分析方法进行改进,将区间进行再次划分并用显性直观的数值进行度量;然后,以某型飞机升降舵操纵分系统为例,进行危害性分析.结果表明:该方法可以对各故障模式或产品的危害度给出精确的量化值,为改进决策提供支持.

Research on Quantitative Criticality Matrix Analysis Method

Abstract: FMECA is the basis of reliability analysis, maintainability analysis and so on. In the criticality matrix, the horizontal axis is severity level, the vertical axis is criticality value of the failure mode or product. However, the failure modes can not be accurately identified while they have the same severity level. And then, that will lead to criticality with deviation and non-optimal improvement decisions. In addition, the efficiency of graphic method is low. A new calculation method of quantitative analysis method of criticality matrix based on the current method is described in this paper, which can be used for improving the precision and efficiency of FMECA. A sample is demonstrated that quantitative value of failure mode or product criticality can be obtained easily, which is the basis for supporting improvement decisions.