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A Newly Developed Safety-Critical Computer System for China Metro

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4 Author(s)
Xiangxian Chen ; Department of Instrumentation Science and Engineering, Zhejiang University , Hangzhou, China ; Gongshuang Zhou ; Yi Yang ; Hai Huang

Applications of advanced electronic technologies have greatly increased the efficiency and performance of safety-critical computer systems. In addition, the architectural flexibility of these systems reduces the types of printed circuit boards they can use, thereby reducing difficulties with maintenance. A newly developed safety-critical computer system is presented in this paper. The system uses some advanced electronic technologies and can be reconfigured to be a triple-modular-redundant system or a dual-modular-duplex-redundant system for different applications. The system's architecture and fail-safe technologies are discussed, and its reliability, availability, maintainability, and safety (RAMS) are evaluated based on the Markov method. Based on these evaluations, the safety-critical computer system developed herein demonstrates great potential for rail use.

Published in:

IEEE Transactions on Intelligent Transportation Systems  (Volume:14 ,  Issue: 2 )