Interlock system is the core control equipment to command the rail transit,ensure the train operation safety,realize the modernization of train operation and traffic command,and improve the transportation efficiency.Based on the basic structure and function of urban railway interlocking system,the factors affecting train safety in the interlocking system are analyzed.The function and connection of each component of the current urban rail transit interlocking system are studied.By constructing TYJL-Ⅱ system accident tree model,the factors affecting the safety performance of rail side equipment are investigated.The study shows that the failure detection rate and failure rate are beneficial to improve reliability and safety.
interlock systemredundant structurereliabilitysecurityfault tree