Abstract: The importance and necessity of the fault diangosis expert system in the propulsion system of spacecraft was discussed.Combined the concrete fault diagnosis expert system developed according to engineering background,the design idea,characteristic,function,requirement of software,and hardware environment was also investigated.

Key words: Spacecraft propulsion;Engine failure;Fault diagnosis expert system;Fault detection

摘要： 论述了设计航天器推进系统故障监测与诊断专家系统的重要性和必要性。并结合具体工程背景所研制开发的诊断系统， 研究了其主要的设计思想、特点、功能以及软件需求分析，实现软／硬件环境

关键词: 航天器推进;发动机故障;故障诊断专家系统;故障检测