关键词: 液体推进剂火箭发动机;故障诊断;模型;知识库

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.

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