铁道标准设计2024，Vol.68Issue(6)：207-213,7.DOI:10.13238/j.issn.1004-2954.202210110003
基于通信对象状态判断的二乘二取二安全计算机平台主备切换研究
Research on Active-standby Switch of Double 2-vote-2 Safety Computer Platform Based on Status Judgment of Communication Object
摘要
Abstract
The railway signal control system usually adopts a special double 2-vote-2 safety computer platform for information transmission,logic operation,object control and other functions.With the increasing varieties and numbers of external communication objects,the existing active-standby switch methods for security computer platforms may have problems such as not switching when a failure occurs or unnecessary switching when the same external failure occurs.This paper presents an active-standby switch method of double 2-vote-2 safety computer platform based on communication state judgment of communication objects.This method first defines the quantitative indicators such as switching value and priority,and designs the calculation formula of switching value.Then,from the aspects of establishing communication,judging communication interruption,and calculating the number of normal communication,the method formulates different judgment criteria for the active and the standby system.Finally,the method compares the switching values,and decides whether to switch between the active and the standby system.The method is verified in practical applications in typical scenarios.The results show that the active-standby switch method based on the communication object state judgment improves the system availability and reduces the unnecessary switching phenomena that affect the system security compared with the active-standby switch method based on the board level and the number of calculations;the designed active-standby switch method can improve the reliability and security of the system by classifying and analyzing different communication modes,different redundant structures and different control devices.关键词
铁路信号/二乘二取二/安全计算机平台/主备切换/通信状态/倒机值Key words
railway signaling/double 2-vote-2/safety computing platforms/active-standby switch/communication status/switching value分类
交通工程引用本文复制引用
郭亮,王拓,路红..基于通信对象状态判断的二乘二取二安全计算机平台主备切换研究[J].铁道标准设计,2024,68(6):207-213,7.基金项目
中国国家铁路集团有限公司科技研究开发计划项目(J2021G006) （J2021G006）
中国铁道科学研究院集团有限公司科研项目(2021YJ030) （2021YJ030）
