结合OWA算子和模糊DEMATEL的风险评估方法

针对传统故障模式与影响分析(FMEA)方法在实际应用中的不足,提出一种基于有序加权平均(OWA)算子和决策试行与评价实验法(DEMATEL)的风险排序方法。FMEA专家对故障模式的3个风险因子给出模糊评价信息,应用OWA算子对评估信息进行集结,得到各故障原因对故障模式的影响强度。采用模糊DEMATEL法构建FMEA系统要素间的初始直接影响矩阵,经过运算可得综合影响矩阵,并计算各故障原因的原因度,据此进行产品或系统的失效风险评估。运用该方法对地铁车门系统的基础部件进行安全性分析,并将所得结果与传统RPN方法的结果做对比,验证了该方法的可行性和有效性。

FMEA Method Combining OWA Operator and Fuzzy DEMATEL

Considering the shortcomings of traditional failure mode and effect analysis(FMEA) method in practical application,a risk ranking method was proposed based on ordered weighted averaging(OWA) operator and decision ma-king trial and evaluation method(DEMATEL).FMEA experts make fuzzy evaluation on the three risk factors of the fai-lure modes,and the evaluation information is aggregated by OWA operator to get the influence degree of the failure cause to failure mode.The initial direct-relation fuzzy matrix of the FMEA system is constructed by using fuzzy DEMATEL method,then the total-relation fuzzy matrix is calculated,and the reason degree of each failure cause is computed,based on which the product or system risk assessment is conducted.The proposed method is applied to safety analysis of the basic components of the metro car door system,and the feasibility and effectiveness of the method is verified by comparing with the results of the traditional RPN method.