Study on Condition Evaluation Method of Shanghai Rail Transit Vehicle Equipment

Objective Shanghai Metro features diverse vehicle models and significant variations in equipment conditions, so it is necessary to establish a scientific and effective vehicle equipment status assessment system to ensure the safe and reliable operation of urban rail transit vehicles. Method By analyzing the shortcomings of existing assessment systems, an evaluation index system is constructed, covering four dimensions: operational safety, service quality, equipment failure, and spare parts supply four dimensions. A three-level evaluation framework is proposed: 1) At the key component level, components are categorized into electrical/mechanical/consumable types, with respective scoring models（weighted scoring for electrical components, condition inspection for mechanical components, and wear prediction for consumables）; 2) At the subsystem level, a comprehensive scoring method integrating key component evaluations is adopted; 3) At the vehicle model level, the subsystem evaluation values are integrated through the normalized weighted method. A dynamically updated project library is established based on evaluation results. Result ＆ Conclusion Taking the door system of a certain vehicle model in Shanghai Metro as an example, the feasibility of the method is validated. It shows that evaluation results of the door controller（level D）, limit switch（level C）, and door motor（level A） are consistent with the actual conditions, and the transformation plan proposed as a result supports the maintenance decision effectively. The formulated evaluation method system can provide a standardized reference framework for the status management of urban rail transit vehicles. The weight setting needs to be continuously optimized in the future to improve evaluation objectivity.