CBTC热备冗余系统软件安全切换技术的研究与实现

Research and Implementation of Software-based Switch over between CBTC Hot Redundant Systems

城市轨道交通基于通信的列车控制(CBTC)系统中,关键控制器的热备冗余是实现系统高可用性的常用技术之一。热备冗余系统间的安全切换技术也就成为了实现系统高可用性的关键技术。阐述了热备冗余系统软件安全切换技术设计和实现阶段面临的若干技术难题,如基于软件与硬件切换的功效分析、故障切换与主动切换技术方案分析与实现等;在此基础上,提出了具体的技术解决方案。

In urban rail transit CBTC,the hot-redundant of the key controller is a frequently used technique for higher performance of the system. Therefore,the switch over between hot redundancy systems is a key technology to achieve this goal. In this paper,the difficult technical problems in software-based switchover between hot redundancy systems during the design and implementation periods are described,including the effect analysis between software and hardware,failure switching and analysis of the active switching technology schemes. On this basis,some concrete solutions are proposed.