Design and RAMS Analysis of a Fault-Tolerant Computer Control System
This paper presents a fault-tolerant computer system. It is designed as a double 2-out-of-2 architecture based on component redundant technique. Also, a quantitative probabilistic model is presented for evaluating the reliability, availability, maintainability and safety (RAMS) of this architecture. Hierarchical modeling method and Markov modeling method are used in RAMS analysis to evaluate the system characteristics. The double 2-out-of-2 system is compared with the other two systems, all voting triple modular redundancy (AVTMR) system and dual-duplex system. According to the result, the double 2-out-of-2 system has the highest dependability. Especially, the system can satisfy the safety integrity level (SIL) 4, which means the system”s probability of catastrophic failure less than or equal to 10~8 per hour, therefore, it can be applied to life critical systems such as high-speed railway systems.
double 2-out-of-2 system availability maintainability reliability safety (RAMS) safety integrity level (SIL) hierarchical modeling method
WANG Shuai JI Yindong DONG Wei YANG Shiyuan
Department of Automation,Tsinghua University,Beijing 100084,China;Tsinghua National Laboratory for I Tsinghua National Laboratory for Information Science and Technology,Beijing 100084,China Department of Automation,Tsinghua University,Beijing 100084,China
国内会议
北京
英文
116-121
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）