ANALYSIS OF FAULT-TOLERANT SYSTEM ARCHI-TECTURE FOR RAILWAY SIGNALING SYSTEMS

초록

In the railway, railway signaling system is located in the wayside and on-board as the very vital control system ensuring the stable operation of train. Since a trivial failure of this control system can cause a fatal accident, securement of the high reliability and availability of vital control system is becoming a very important issue in the railway system. In order to secure the high reliability and availability of vital control system, a lot of efforts are made in various aspects such as the hardware, software and system, etc. of control system. Among them, since the hardware of vital control system can cause a fatal accident by affecting whole system as a single system in case where any accident is occurred, the fault-tolerant system using the multiple system method is utilized in general. In this paper, the result of development in fault-tolerant system of TMR(Triple Modular Redundancy) structure for this vital railway signaling system and the reliability analysis is resented.