双机热备计算机联锁系统可靠性与安全性指标分析

分析了单机和双机热备计算机联锁系统的工作模式，建立了相应的故障安全模型并分析了故障检测覆盖率对双机热备计算机联锁系统的可靠性与安全性的影响．指出了减小故障检测时间、提高故障检测率是提高双机热备系统可靠性与安全性的重要技术措施．当故障检测覆盖率很高时，双机热备系统与单机系统的不安全度在同一数量级上．

Quantity Analysis of Reliability and Security in the Camputer-based Interlocking System with Dual Computers

This paper analyzes the work mode of computer based interlocking system with single computer and dual computers, establishes corresponding failure safe model, and analyzes the influence of failure checking cover ratio to the reliability and security of dual computers system.This paper also points out that reducing failure checking time and increasing failure checking cover ratio are the important technical measures to improve the reliability and security of dual computers system. When the failure checking cover ration is very high, the insecurity of dual computers as well as the single computer are all in the same quantity degree.