液体火箭发动机系统故障实时监测算法研究

利用水力系数（ＣＡＤＥ）的性质和现有液体火箭发动机管路系统中压力域流量的测量值，进行适当分段组合，计算出相应的压力和水力系统改变量。并根据实际试车经验确定出相应的根限值。同时使用灰色理论中ＧＭ预测模型对发动机的监测参数进行预测。从而及早分析出发动机所处工况。该算法能尽早地探测出发动机系统中出现的故障，以提供足够的时间对发动机采取措施。

RELA-TIME SYSTEM FAULT DETECTION ALGORITHM FOR LIQUID ROCKET ENGINE

Using the definition of hydraulic coefficient and existent measurements of pressure or flow in pipes of liquid rocket engine, the pressure and the change amount of hydraulic coefficient will be determined according to appropriate calculation of a certain separate pipe. And the relative critical values will be gived from the practical test results. Meanwhile, monitoring parameters will be predicted by a GM model of Grey Theory, and engine health condition will be analysed early. This algorithm can detect the system fault in rocket engine as early as possible, so that there is enough time to adopt measures for engine.