区域控制器系间同步方法设计

Design of Synchronization Method between Zone Controller Systems

区域控制器(ZC)是CBTC系统的核心控制子系统,由ZC应用软件和安全计算机平台组成。基于二乘二取二架构的ZC系统采用主备系热备运行机制,以增强系统的可用性。当ZC主系故障时,系统自动切换至另一系连续执行控制任务。传统ZC同步方法完全依赖安全计算机平台的运行状态,应用软件未考虑主备系通信的延时影响。提出一种跨周期ZC双系同步方法,实时对ZC主备系通信的延时状态进行评估,并采取相应安全策略,ZC系统在切系时能够无缝切换,提高了系统的实时性和安全性,以进一步保障安全运营。

Zone Controller(ZC) is the core control subsystem of CBTC system and consists of ZC application software and vital computer platform. The ZC system based on the Double 2 out of 2 structure is subject to the hot standby operation mechanism of the main and standby systems, aiming to enhance the availability of the system. When the main system of ZC fails, the system will automatically switch to another system for continuous control tasks. The traditional ZC synchronization method completely relies on the operating state of the safety computer platform, and the application software fails to consider the delay effect of main and standby system communication. A cross-cycle ZC dual-system synchronization method is proposed to evaluate the delay status of ZC main and standby system communication in real time and take corresponding safety strategy.The ZC system can seamlessly switch to improve the timeliness and safety of the system, and then further ensure the safe operation.