Abstract: Presented an adaptive thresholds algorithm(ATA) for fault detection of liquid rocket engine(LRE), the parameter thresholds of which were calculated from real time estimated mean values, standard deviations and fixed band width factors trained by test data using the training algorithm also introduced The performance of ATA is higher than both the System for Anomaly and Failure Detection(SAFD) algorithm and the Redline System(RS) algorithm, indicated by off line detection results of test data measuredin twenty two ground tests of a large LRE

Key words: Liquid propellant rocket engine;Ground test;Fault detection;Fault diagnostic system;Numerical calculation

摘要： 提出一种自适应阈值故障检测算法,其检测阈值由实时估计的参数均值、标准差及由训练算法得到的带宽系数计算。用某发动机22次点火试验的试车数据进行离线故障检测,结果表明其综合性能优于红线系统和SAFD算法。

关键词: 液体推进剂火箭发动机;地面试验;故障检测;故障诊断系统;数值计算