基于改进型AHP的地铁列车设备重要度分析

Criticality analysis of subway train equipment based on improved analytical hierarchy process

以实现地铁列车的安全稳定运行为目的,从列车基本结构出发,对其七个子系统中的主要功能部件构建了基于七个评价因子改进型层次结构模型和底层设备重要度评估模型。改进层次分析法(AHP)的判断矩阵构建方法和权值计算方法,引入模糊三角函数减少主观因素影响,建立多个专家的各因素间相对重要性模糊判断矩阵,验证矩阵的一致性,计算矩阵的最大特征根和特征向量,由此确定权重排序。列车各部分重要功能单元根据故障信息和维修记录打分,结合权重和各个设备的故障率综合考虑得出最终的重要度评估结果,为列车设备的维修提供参考。

The purpose of this paper is to realize safe and stable operation of subway train. From the basic structure of the train, the improved hierarchical structure model and the underlying device importance evaluation model of the main functional components in seven Subsystems are designed and implemented based on the seven evaluation factors. This paper improved the method of judgment matrix construction and weight calculation for analytic hierarchy process （AHP）, introduced a fuzzy trigonometric function to reduce the influence of subjective factors, established the experts-judgment- matrix of relative essentiality of the various factors, tested the matrix＇s consistency verification, computed the maximum eigenvalue and the eigenvector of the matrix, thus determined the weights order. The important functional units in the train scored according to the fault messages and the repair records, and then combined with the weight and the failure rate of each device educed the final evaluation results and provided reference for the maintenance of the car devices.