祝融号火星车重要数据保护设计与实现  

Design and implementation of important data protection for the Zhurong Mars rover

作　　者：兰天[1] 朱玛[1] 彭松[1] 陈百超[1] 贾阳[1] LAN Tian;ZHU Ma;PENG Song;CHEN Baichao;JIA Yang(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《中国空间科学技术》2023年第3期63-72,共10页Chinese Space Science and Technology

基　　金：国家重大专项工程。

摘　　要：由于火星表面测控支持受限,祝融号火星车需要自主实现可靠生存、高效探测,而重要数据保护是这种自主能力的必要条件。由于能源约束,火星车内仅有少量设备处于长期工作状态,无法沿用基于器内信息网络的分布式重要数据保护方案。为解决这一问题,设计了一种分布式与集中式相结合的重要数据保护架构。由系统管理单元(system management unit,SMU)集中保存重要数据,并在其他设备加电时为其提供分布式重要数据服务。针对SMU复位、切机后的时间恢复需要,提出了一种基于多重备份的器上时间保护方法,低消耗、高可靠地实现了器上时间保护。为了在有限空间内保护更多延时指令,提出了一种专用存储区与公用存储区相结合的重要数据保护方法,有效提升了存储空间利用率。上述重要数据保护方案在火面测控、能源双重约束下为祝融号火星车提供了可靠的业务连续性保障,可为后续深空探测器的设计提供参考。There is very limited ground support on the Martian surface,so the Zhurong rover needs to independently realize reliable survival and efficient exploration,and important data protection is a necessary condition for the autonomous capability.Due to energy constraints,only a small amount of equipment in the rover is in long-term operation,and the distributed important data protection scheme based on the onboard information network cannot be adopted.To solve this problem,an important data protection architecture that combines distributed and centralized data protection was proposed.The system management unit(SMU)centrally stored important data and provided distributed important data services for other devices.To realize the time recovery after reset or switch,an on-device time protection method based on multiple backup was proposed,which realized the on-device time protection with low consumption and high reliability.To protect more timed commands in limited space,an important data protection method combining private storage area and public storage area was proposed,which effectively improves the utilization rate of storage space.Proposed important data protection scheme provides reliable business continuity guarantee for the Zhurong Mars rover under the double constraints of limited ground support and limited energy,which can provide a reference for the design of subsequent deep space probes.

关 键 词：祝融号火星车 业务连续性 重要数据保护 多重备份 存储区复用 

分 类 号：V474[航空宇航科学与技术—飞行器设计]