一种安全切换模块的设计与控制方法

Design and Control Method of Safe Switching Module

为解决既有信号系统安全计算机平台双系热备切换时存在的切换时间长、可靠性差的不足,设计一种具备高可靠性与安全性的切换模块。通过对该模块的系统方案和控制逻辑的分析与验证,实现当安全计算机平台中任意一系出现异常时,平台主/备系与安全切换模块通过双模接口的安全通信、运算后确定主/备系状态,由此实现平台快速、无扰、安全切换与平稳运行,从而提高系统的安全性及可靠性。

To solve the shortcomings of long switching time and poor reliability in the double-system hot standby switching of the vital computer platform of existing signaling systems,this paper presents the design of a switching module with high reliability and safety.It also provides the analysis and verification of the system scheme and control logic of the proposed module.When any system of the vital computer platform is abnormal,the main and backup systems of the platform and the safe switching module determine the status of the main and backup systems after the secure communication and operation of the dual-mode interface.This enables the fast,undisturbed and safe switching and smooth operation of the platform,thereby improving system safety and reliability.