液体火箭发动机故障诊断技术综述

Review on Fault Diagnosis Technology of Liquid Rocket Engine

关键词:  液体火箭发动机  故障模式  故障诊断  系统辨识  模式识别  专家系统  健康管理

Key words:  Liquid rocket engine  Failure mode  Fault diagnosis  System identification  Pattern recognition  Expert system  Health management

摘要:

综述了液体火箭发动机故障模式与故障机理、故障诊断技术、故障诊断技术应用三个方面的研究进展。不同种类故障诊断方法的优缺点和应用场景各不相同，融合多种方法于一个健康管理系统，可以提升故障诊断的时间敏感性、对故障的覆盖性、对发动机工作阶段的覆盖性以及对传感器失效的鲁棒性。制约故障诊断方法在液体火箭发动机健康管理中应用的三个主要问题是：（1）故障诊断方法与对象结合不够紧密；（2）基础研究不足，故障模式和故障机理积累欠缺；（3）数据融合不足，信息量匮乏。

Abstract:

This paper reviews the research progress in three areas： liquid rocket engine failure modes and mechanisms， fault diagnosis methods， and fault diagnosis applications. Different types of fault diagnosis methods have different advantages， disadvantages and application scenarios. Combining multiple fault diagnosis methods in one health management system improves the time sensitivity of fault diagnosis， coverage of faults， coverage of engine operating phases， and robustness to sensor failures. Three issues limiting the application of liquid rocket engine fault diagnosis methods on engine health management systems are： （1）Fault diagnosis methods are not closely integrated with the object； （2）insufficient basic research， lack of failure modes and failure mechanisms； （3）lack of data fusion， lack of information.