B304 Study on Quantitative Evaluation Methods for Safety of Railway Signalling Systems
Koji Iwata, Ikuo Watanabe, Yuji HIRAO, Shigeto Hiraguri, Hideo Nakamura, Yoshihisa SAITO · The Proceedings of International Symposium on Seed-up and Service Technology for Railway and Maglev Systems STECH · 2003
We present a new safety analysis method for railway signaling systems and introduce component fault occurrence probability vector, functional failure probability vector, correlation matrix between functional failures and component faults, mitigating matrix, and several other factors. By using these factors, we can estimate the risk of signaling systems, the effectiveness of safety measures, dangerous system failure probability and other related values. We also evaluate the effectiveness of these technologies by calculating the elements of mitigating matrix.