液体火箭发动机基于关系模型的故障诊断方法

Relation-model based fault diagnosis technique for liquid-propellant rocket engines

关键词:  液体推进剂火箭发动机  故障诊断  模型  知识库

Key words:  Liquid propellant rocket engine  Fault diagnosis  Model  Knowledge base

摘要:

提出了一种新的描述液体火箭发动机系统的定性模型,阐述了系统部件行为模型和结构模型的构建方法,给出了求解基于关系模型诊断问题的推理机制,建立了液体火箭发动机基于关系模型的故障诊断方法。以空间推进系统为研究对象进行了实例诊断分析,结果表明:该方法是一种有效的基于定性模型故障诊断方法。

Abstract:

The relation-model for liquid-propellant rocket engines was proposed. Modeling for both setting up components’ behavior models and system’s structure model was described, respectively. Then, the reasoning mechanism for solving relation-model based on diagnosis problems was formulated and the relation-based fault diagnosis method was presented. By applying the diagnosis method proposed to the spacecraft propulsion systems, the results show that the relation-based fault diagnosis method is effective.