卫星结构的复杂性、运行环境的独特性和诱发故障的多源性，使得卫星故障的诊断与预测较一般设备困难。通常，一种形式的推理只能诊断和预测卫星的一类故障。文章提出了同时应用多种形式推理进行卫星故障诊断和预测的新方法，此方法已成功地应用于基于知识的卫星故障诊断与恢复系统的开发，并取得了显著的效果。

The fault diagnosis and prediction of satellites is a difficult problem due to the complex structure and the unique of operating environment of satellites as well as the presence of multi-source of satellite faults. Usually, one kind of reasoning model can only diagnose and predict one kind of satellite faults. This paper proposes a new method in which the use of multi-modal reasoning for satellite fault diagnosis and prediction is concerned. The method has been used in the development of the knowledge-based satellite fault diagnosis and recovery system and good results have been achieved.