摘要
车载ATP安全技术平台是基于三模冗余的三取二容错计算机。针对3套计算机系统的同步问题,基于采用公共外时钟同步与时钟漂移变化率有界结合的模型对本地时钟进行偏移和漂移补偿,实现系统本地时钟的同步。在此基础上,软件采用时序控制的方式实现三模系统的任务同步。多次实验结果表明,该同步机制能满足三取二容错计算机在同步技术上的要求。
The safety technology platform of onboard ATP is a three computer channels of the fault-tolerant computer, and how to ensure the system Synchronization of three computers is one of its key technologies. Aiming at the synchronization technology, this paper brings forward the mode, which combines the model of public time synchronization with the model of bounded variance ratio of drift of time to compensate the offset and drift to achieve the synchronization of local time of three systems. Based on this, software adopts scheduling-control to achieve the synchronization of tasks of three systems. According to several tests, the synchronization mechanism proves that it can satisfy the requirement of three computer channels of the fault-tolerant computer.
出处
《计算机工程》
CAS
CSCD
北大核心
2010年第11期14-16,共3页
Computer Engineering
基金
国家自然科学基金资助项目"基于移动闭塞的ATP算法与关键技术研究"(60776832)
关键词
安全技术平台
公共外时钟同步
时钟漂移
safety technology platform
public time synchronization
time drift
