二乘二取二系统的同步表决安全机制研究

Research on Synchronization Mechanism in Double 2-out-of-2

二乘二取二是一种高安全、高可靠性的安全计算机结构,详述了二乘二取二系统中的主备、主从关系,基于任务级的同步表决方法。在考虑时钟漂移情况下,分析了主从并发式和从机等待式同步表决方式的特性,提出了主从并发式用于主备同步,从机等待式用于主从同步的同步机制方案。搭建了该同步机制方案的二乘二取二平台,测试表明,该同步机制能很好地实现同步表决任务。

The double 2-out-of-2 is a kind of safety computer architecture with high safety and reliability.The relationship of hot-standby and master-slave,method of synchronization and voting based on synchronization of task layer are discussed in the paper.In case of clock drift,the characteristics of two synchronization mechanisms named master-slave in parallel and slave response are analyzed.A synchronization voting program is proposed,in which master-slave in parallel mode is used in hot-standby and slave response mode is used in master-slave.A double 2-out-of-2 hardware platform is built to verify the synchronization voting program.The experiment results show that the proposed program can run correctly.