Author(s)

Li Zhangyang, Nai Wei, Yu Yi, Wang Shaoyin, Dong Decun

Corresponding Author

Wei Nai

ABSTRACT

Rail transit signalling system is a safety critical system, the faults which happen in key equipments of such system could have a negative effect on trains in operation, especially during rush hours. At present, maintenance strategies of those key equipments in general cannot reflect the maintenance demands accurately, for they cannot, on some level, take all the deterministic and non-deterministic factors into consideration. In this paper, a fuzzy decision model which determines the maintenance strategy of key equipments in rail transit signalling system based on Vague sets fuzzy reasoning has been proposed, and based on a case study of Shanghai Metro Line 6, the proposed decision-making model has been proved to be able to not only determine the required maintenance event of equipments, but built the corresponding countermeasure sets as well.

KEYWORDS

Urban rail transit, signalling equipments, maintenance time, maintenance strategy, fuzzy decision model, Vague set.