Abstract: Based on the consistency of output parameters of liquid rocket engine system,the different faults were separated using the measuring parameters in engine test by parity space method.The results show that this method have good effect on liquid rocket engine fault diagnosis.

Key words: Liquid propellant rocket engine;Engine failure;Fault diagnosis;Parity check

摘要： 基于液体火箭发动机系统测量输出之间的内在一致性，直接利用液体火箭发动机试车的测量参数， 采用奇偶空间方法对仿真的液体火箭发动机１６种故障进行分离， 结果证明该方法对实现液体火箭发动机故障诊断有较好的效果。

关键词: 液体推进剂火箭发动机;发动机故障;故障诊断;奇偶校验