容错是数字系统的存在属性。为了进一步提高工业过程微机控制系统的可靠性，在综合动态冗余容错技术和静态冗余容错技术的基础上，提出了一种三微机混合冗余容错模式：在统级硬件冗余的条件下，通过机内信息流划分和机间信息交流，部分实现功能单元级冗余容错，而且应用智能技术将三模表决机制发展为检测、表决和切换相综合的策略，使系统既可三模运行，亦可双模或单模运行。该系统模式已被成功地应用于水轮机调速器。 Fault Tolerance is the existence attribute of a digital system. In order to further improve the reliability of microcomputer control system in industrial process, a three-microcomputer hybrid redundancy fault tolerance mode is proposed based on the combination of dynamic redundancy fault tolerance technology and static redundancy fault tolerance technology. Under the conditions of system-level hardware redundancy , Through the machine information flow division and machine-to-machine information exchange, the functional unit-level redundant fault tolerance is achieved in part, and the application of intelligent technology to develop the three-mode voting mechanism for the detection, voting and switching phase synthesis strategy, the system can run three modes , But also dual-mode or single-mode operation. This system mode has been successfully applied to turbine governors.