双模冗余器载计算机设计与实现  

Design and Implementation of Dual Redundant Space On-board Computer System

作　　者：陈玉坤[1] 张声艳[1] 刘冬[1] 冯忠伟[1] 刘洋[1] 

机构地区：[1]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《计算机测量与控制》2016年第12期130-132,共3页Computer Measurement &Control

摘　　要：器载计算机是航天器电气系统的重要组成部分,其可靠性对航天器能否完成任务至关重要;为了保证航天器上计算机在出现故障时仍能正常工作,对双机冗余器载计算机的体系结构、切换策略、判别准则等内容进行了研究,在保留主份机与双机切换电路、备份机与双机切换电路之间的状态工作信号的基础上,通过在主份机、备份机之间新增加一个状态工作信号,提出了一种改进的自主切换策略;实践表明,运用改进的自主切换策略,在双机切换电路中的自主切换模块出现故障时仍能实现自主切换,同时将比较器设计为软件,采用软件表决、软件选通的思路,消除了硬件比较器的关键单点故障,这些容错设计改进能有效地提高器载计算机系统的可靠性,对高可靠器载计算机设计与实现具有较好的工程参考意义。On--board computer system has a significant role in spacecraft electronic system, and its reliability is especially essential to a- chieve final mission. In order to still work normally when on--board computer has failure, system architecture, switch method and estimation rule of dual redundant space on--board computer system are introduced. On the basis of preserving the state signal between main computer and switch circuit, the state signal between backup computer and switch circuit, and the state signal between main computer and backup com- puter is adopted, then presents a modified independence switch method. By using modified independence switch method, independence switch function still work normally when independence switch module has failure. Comparator is implemented by adopting software vote and soft ware switch approach, and it can eliminate hardware comparator＇s key failure. Practice indicates that the redundant technology can effec- tively improve the reliability of space on-board computer system, and the paper has engineering application value for design and implementa- tion of space on-board computer system with high reliability.

关 键 词：双模 冗余 航天器 计算机 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]