Reliability Analysis of CTCS-3 Train Operation Control Systems via Binary Decision Diagrams Method

CTCS-3 is one of the most advanced train operation control system and has the properties of large scale, redundant configuration and complex structure. In this paper, the binary decision diagram method is used to analyze the reliability of CTCS-3. First, the fault tree module is proposed according to the structure of the system, which is decomposed into sub-modules and then transformed to the binary decision diagrams. The fault probability of the top event of each sub-module is calculated and the reliability of the CTCS-3 system is obtained. Then, the probability importance of the bottom events is investigated and the weak links in the system are explored. The proposed results can provide a theoretical basis for the equipment maintenance and troubleshooting.