Reliability Evaluation And Optimization Of Metro Station Building Automation System

Metro has increasingly become an important direction of urban transportationdevelopment, because it has a lot of advantages which is fast, big traffic volume, low energyconsumption, high efficiency, low pollution, etc. The metro building automation system is animportant guarantee for the metro reliable and safe operation. Studying reliability assessmentmethod which is applicable to metro building automation system is very helpful for guidingthe design and maintenance of metro building automation system and have very importanttheoretical and engineering application value.This thesis introduces structures and functions of the metro building automation system,and summarizes the three typical extracts of the structure and sums up the three kinds oftypical system structure. It describes the basic principle and common reliability method ofreliability assessment and focus on the introduction and transformation of dynamic logic gates,markov model and the the weighted model.Considering the purpose of the subject and the characteristics of the system, the thesisunites reliability block diagram method and dynamic fault tree analysis method to analysis thesystem reliability. Dynamic fault tree can be a very good performance of the system for hotredundancy, correlation order and other characteristics. Weighted model can be a very goodmethod to show the distributivity of the system. And reliability block diagram method canmodel the metro building automation system from the overall angle.Two kinds of typical metro building automation system were assessed by the methodwhich is united by reliability block diagram method and dynamic fault tree method.Reliability parameters is the reliability of the system. The analysis of results laid a foundationof the system subsequent optimization and verify that the proposed evaluation method iscorrect.Based on the the division of the system, each subsystem is separately analysised. Finallysystem diagram of the metro building automation system is designed which is very helpful forthe system design in the future.