关键词: 风险因子分析, 公共模糊识别框架, 证据推理, 矩阵相似度, 最大熵

Abstract: To overcome the shortages of traditional PFMEA which suffered heavy working load and more mistakes,the group evaluation approach was proposed on the basis of evidence theory.The evaluation dimension of risk factors,the corresponding converted coefficients and the corresponding complete sets of grade parts were determined.Various forms of experts' opinions were collected and transformed into the experts' opinions in the basic fuzzy recognition framework.According to maximum entropy principle and maximum value of fuzzy expected utilities,the final opinions of risk factors given by each expert were confirmed,and group opinions of risk factors were obtained by calculating the experts' weights with matrix similarity and aggregating the experts' final opinions on risk factors.Group opinions of risk factors were aggregated by using fuzzy evidential reasoning algorithm,and the comprehensive risk group opinion of process failure mode was obtained and sorted.A risk analysis on the assembly process of aircraft portable cover was given to illustrate the applicability and effectiveness of proposed approach.

Key words: risk factor analysis, basic fuzzy recognition framework, evidential reasoning, matrix similarity, maximum entropy