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.