列车网络控制系统中MPU的安全设计

Safety Design of MPU in Train Control and Management System

随着轨道交通行业对电子控制产品的功能安全要求愈加重视,针对列车网络控制系统TCMS中主处理单元MPU的安全设计也愈加重要。从MPU的电源板、主控板、网络板的硬件原理与软件功能进行了MPU的架构设计说明;依据EN50128标准对MPU的软件系统各阶段设计和测试进行规范,依据EN50129标准对MPU的硬件安全回路失效率进行约束;最后进行MPU的安全回路设计、TCMS中的MPU冗余安全回路设计。从而确保MPU的安全可靠运行,保障TCMS行车安全与稳定。

This paper describes the MPU architecture design from the hardware principle and software function of MPU power board,main control board and network board.According to the EN50128 standard,the design and testing of MPU software system in each stage are standardized,and the failure rate of MPU hardware safety loop is constrained according to the EN50129 standard.Finally,the design of MPU safety loop and MPU redundancy safety loop in TCMS are carried out.