IDENTIFICATION OF KEY SUBSYSTEMS FOR URBAN RAIL VEHICLES BASED ON FUZZY COMPREHENSIVE EVALUATION
Zongyi Xing1, Lingli Mao2, Limin Jia3, Yong Qin3
1School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China
2School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
3State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China
Identification of key subsystems for urban rail vehicles is important for the selection of maintenance strategy. The fuzzy comprehensive evaluation technique is applied to determine the key subsystems of urban rail vehicles. Firstly, the vehicle is divided into nine subsystems according to the module partition method. Then, the degrees of occurrence, severity, detection and maintenance cost are chosen as the evaluation factors that are quantified based on fuzzy theory and collected historical data. Finally, the calculation model of critical degree is established based on the fuzzy comprehensive evaluation method. The proposed approaches are applied to Guangzhou Metro Corporation, and five key subsystems are selected. The experiment results, which are consistent with those of most knowledgeable engineers and experts, indicate the validity of the proposed method.