基于模型知识的液体火箭发动机故障诊断方法研究

Research of liquid rocket engine fault diagnosis method based on model knowledge

提出了一种基于定性模型的液体火箭发动机故障诊断方法 ,该方法首先通过建立发动机的定性偏差模型 ,以及对故障模式进行效应分析组建发动机的诊断模型知识 ,然后通过检测模型与系统实际行为的一致性进行故障诊断。

The main foundation of this paper is to use qualitative deviation models,which serve as a modeling paradigm,and the results derived from the analysis of fault modes in applying qualitative model based diagnosis on liquid rocket engine.Second,the models are used in diagnosis,which checks consistency of the model with observed bahaviors.We present preliminary results of putting this approach into practice for real problems in liquid rocket engine,which show the method is valid.