针对计算机联锁系统的二乘二取二容错结构,基于马尔可夫模型,将各单元的失效率划分为几个独立的分量,根据每部分失效率对结构的影响,利用计算机对系统的可靠性和安全性进行分析和仿真计算。结果表明,二乘二取二容错结构满足铁路联锁系统高可靠性和高安全性要求。 According to Markov model, the failure rate of each unit is divided into several independent components. According to the influence of each failure rate on the structure, the reliability of the system by computer Sexual and safety analysis and simulation calculations. The results show that the two-by-two-take-two fault-tolerant structure meets the requirements of high reliability and safety of the railway interlocking system.