一种新型二乘二取二安全计算机系统

摘要

设计一种用于轨道交通系统的二乘二取二安全计算机系统,包括I/O模块、CPU模块和切换模块.在I/O模块中,利用动态电路实现数据安全输入及输出.在CPU模块中,提出一种基于以太网通信的同步表决方案.在切换模块中,通过输出回路控制实现主备之间的无缝切换.测试结果表明,该系统能够满足轨道交通系统对安全计算机平台的可靠性和安全性要求.%This paper designs a new dual-duplex safety-critical computer system used in the rail transport system including I/O module, CPU module and switch module. In the I/O module, the dynamic circuit design can make it achieve safe input and output data, hi the CPU module, this paper presents a synchronization vote program based on Ethernet communication. In the switch module, it implements seamless switch by loop control. It is shown through functional and safety test that the dual-duplex safety-critical computer system can meet the needs of computer platform with high reliability and security.