微小卫星星务计算机系统的容错控制策略研究

微小卫星系统是一个可靠性要求很高的系统,需要由具有容错能力的星载计算机来控制。针对微小卫星重量、体积、功耗的限制,提出了一种微小卫星的星务计算机系统的可靠性设计方案,设计中采用双模冗余方案搭建系统的容错结构,并根据卫星的运行要求提出了适用于微小卫星的温备份方式容错控制策略,介绍了一些用于支持温备份方式容错控制策略的关键技术。通过分析在微小卫星设计中的适用情况,温备份策略从硬件开销和时间开销两个方面都有利于卫星的设计。在立体测绘微小卫星“试验卫星一号”的星务计算机系统中的应用表明,提出的可靠性设计方案能够提高小卫星的可靠性、安全性以及实时性。

Fault-Tolerant Mechanisms of House-keeping Computer System for The Small Satellite

Small satellites need computer systems with fault tolerance for the reason of requiring high reliability. This paper presented a reliability design for housekeeping computer systems used in small satellites. Based on the dual redundancy, the reliability design uses warm backup fault-tolerant mechanism which has the advantage of reliability and real-time control and is supported by some key technologies mentioned in the paper. An application of the reliability design to a housekeeping computer system used in Solid Measurement Micro Satellite of HIT, named TS-1 satellite, proved that the design can improve the reliability of the small satellite.