关键词: 液体推进剂火箭发动机;发动机故障;故障诊断;特征提到~+

Abstract: The original feature of fault of liquid rocket engine is extracted, so that the normal pattern of malfunction can be expressed effectively by a few new features. The influence of different distributing matrix of original feature on the validity of extractive feature has been compared. The effect of using these new features to represent various fault has been examined’ The result shows that both effects are in accordance with each other.

Key words: Liquid propellant rocket engine;Engine failure;Fault diagnosis;Feature extracted~+