计算机联锁系统二乘二取二结构的可靠性和安全性分析  

Analysis of Reliability and Safety of Computer Interlocking System With Double 2-vote-2 Structure

作　　者：魏臻[1] 许崇[1] 胡庆新[1] Wei Zhen;Xu Chong;Hu Qingxin

机构地区：[1]合肥工业大学计算机与信息学院

出　　处：《铁道通信信号》2019年第12期1-5,共5页Railway Signalling & Communication

摘　　要：安全关键系统常用可靠性和安全性来衡量优劣,多模冗余是一种重要的提升此类性能的设计。本文通过使用PRISM工具,建立运算模块、表决模块和选择模块失效率和诊断覆盖率的5种组合,得出各因素对二乘二取二结构的可靠性和安全性的影响程度,并对不同结构的可靠性和安全性进行了对比分析,结果显示二乘二取二比其他2种结构更能满足安全关键系统的要求。The performance of safety-critical systems is often judged by their reliability and safety and redundancy is an important design to improve such performance.Using the PRISM tool,five groups are formed in different combinations of the factors:failures of computing module,voting module and switching module and diagnostic coverage and the impacts of these factors on the reliability and safety of a double 2-Vote-2 system are concluded.Furthermore,the reliability and safety of different structures are compared and the results show that the double 2-Vote-2 structure can better meet the requirements of safety-critical systems than the other two structures.

关 键 词：计算机联锁 安全关键系统 可靠性 安全性 二乘二取二 

分 类 号：U284.362[交通运输工程—交通信息工程及控制]