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详细介绍了故障诊断技术在国外载人航天器故障诊断中的应用及发展过程，并对专家系统技术进行了重点分析和介绍．国外载人航天器故障诊断历了６０年代简单的状态监测（“水星”号）、７０年代的基于算法的诊断（“阿波罗”）、一直到８０年代的基于知识的智能诊断（航天飞机）三个阶段．还介绍了ＮＡＳＡ为其航天飞机主发动机透平泵和空间站电源系统开发的故障诊断专家系统，并对航天领域故障诊断技术特点进行了综合分析。同时指出了航天领域故障诊断技术的发展趋势．
The application and development process of fault diagnosis technology in fault diagnosis of manned spacecraft abroad are introduced in detail, and the expert system technology is analyzed and introduced in detail. Foreign manned spacecraft fault diagnosis experienced simple state monitoring (“Mercury”) in the 1960s, algorithmic-based diagnostics in the 1970s (“Apollo”), intelligent knowledge-based diagnostics (space shuttle) in the 1980s, three phases. The NASA also introduced the fault diagnosis expert system developed for its space shuttle main engine turbine pump and space station power system. The characteristics of fault diagnosis technology in aerospace field were also analyzed. At the same time, it points out the development trend of the fault diagnosis technology in aerospace field.