基于改进归纳式监控算法的液体火箭发动机实时故障检测

对归纳式监控算法（IMS）应用于故障检测时虚警率高的问题，提出一种改进IMS.改进后的算法对测试时可能出现的野点进行了处理，降低了待测数据中野点对测试结果的干扰.以某型液体火箭发动机仿真试车数据为例，进行了使用IMS的实时故障检测实验.结果表明，原始IMS在进行故障检测时会出现多次虚警，改进后的IMS在实时准确的同时，虚警率大大降低，由37.5%降低至0，达到液体火箭发动机故障检测程序的要求. 

Fault detection for liquid-propellant rocket engine based on improved inductive monitoring system

The problem of high false alarm rate when inductive monitoring stystem (IMS) was applied to monitor the system during trials or flights was analyzed, and an improved IMS method was proposed. The improved algorithm processed outliers that may occur during the test, reducing interference evoked by outliers of test data. The experiment was conducted by taking the trial data of a certain type of liquid-propellant rocket engine as an example. Simulation was performed and the result verified that the original IMS had a high false alarm rate, yet the improved IMS can decrease false alarm rate from 37.5% to 0 while ensuring timeliness, reliability and accuracy of fault detection.