基于RCM 和模糊综合评判的航空发动机附件维修决策分析

针对RCM理论在定量决策中的不足引入模糊综合评判方法,分析影响航空发动机附件功能的因素,采用层次分析法确定了各因素的权重,再通过专家调查表确定了各因素隶属度,进行了定量计算,确定了航空发动机附件的维修方式。根据使用中对安全性、任务性、经济性的不同要求,建立了基于可靠性的维修间隔期模型。通过收集燃油增压泵的外场故障数据并进行分布拟合,得到故障数据服从2参数威布尔分布;最后应用维修间隔期数学模型进行计算,确定其定时维修间隔期为2000 h。

Maintenance Decision Analysis Based on RCM and Fuzzy Comprehensive Evaluation of Aeroengine Accessories

According to RCM theory in quantitative decision deficiencies fuzzy comprehensive evaluation method, the factors affectingaviation engine attachments were analyzed, the weight of each factor were determined by AHP and then the factors membership weredetermined by expert surveys. The quantitative calculations were performed and maintenance modes of aeroengine accessories weredetermined. According to different requirements of safety mission economy and reliability in operation the model of the maintenanceinterval were built. The fault data conform to two-parameter Weibull distribution. By collecting failure data of the fuel boost pump in fieldand conducting distribution of the data the calculation were performed by maintenance interval mathematical model. The results show thatthe maintenance and repair interval is 2000 h.