航天器热备份控制计算机软故障前向恢复方法

Forward Recovery Technique of Single Modular Soft-Fault in Hot-Backup Control Computer

针对航天器热备份控制计算机单机软故障,提出一种前向恢复方法.该方法依据航天器热备份控制计算机系统的先验知识,通过对内存分块管理和重分配,进行数据比对和数据同步,使得软故障情况下系统中各单机自主、稳定地恢复至独立输出完全一致.与传统的恢复方法相比,新方法针对航天器热备份控制计算机系统设置合适的故障识别与定位的方法,且不用增加任何硬件开销.利用返回飞行器GNCC控制计算机对该方法进行了实现,试验结果证明该方法正确可行,为航天器热备份控制计算机的自主恢复技术奠定良好的基础.

Aiming at single modular soft fault of hot-backup spacecraft control computer, a new recovery technique is presented in this paper. Based on the apriori knowledge of spacecraft hot-backup control computer, this algorithm, via tagging and reallocating memory, can make the fault computer in the system stably recover to the status that can output the same data with the non-fauh ones. Compared with the traditional recovery technique, the proposed method presents new fault identification and location strategies without any hardware cost. The new algorithm is verified in spacecraft GNCC systems. The results of the experiment show that the new technique can lay good foundation of the recovery technique of space- craft hot-backup control computer.