Abstract: A fault detection and diagnosis method based on the rule and time variation was presented based on the normal diagnostic expert system. The knowledge representation method and diagnostic reasoning strategies were described. A fault diagnostic prototype system was developed in Windows NT. The architecture and function of the prototype system were introduced.

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

摘要： 根据航天器推进系统的时变性特点 ,在规则的专家系统方法基础上 ,提出了推进系统面向时态的故障检测和诊断方法。在对知识表示方法和推理诊断策略进行改进后 ,在WindowsNT环境下实现了一个基于知识的故障诊断原型系统 ,介绍了原型系统的结构、功能及网络实时数据通信方法 ,经过仿真数据测试验证了方法的有效性

关键词: 航天器推进;发动机故障;时变系统;故障诊断专家系统;故障检测