固液捆绑火箭发动机健康诊断技术

Engine Health Diagnosis Technology for Solid-Liquid Bundled Launch Vehicle

为使固液捆绑运载火箭发射更具有可靠性和安全性,本文首次提出了一种基于三冗余架构的芯级液体发动机健康诊断系统。在芯级液体发动机点火后,由箭上健康诊断系统根据红线算法对发动机状态进行诊断,确认液体发动机状态正常后再进行固体发动机点火。通过地面发动机试车及飞行试验考核,结果表明:该发动机健康诊断系统设计正确,能够及时有效地检测液体发动机工作状态,且未发生误警报或漏警报。

In view of the irreversibility of solid propellant engine ignition in solid-liquid bundled launch vehicle,a liquid engine health diagnosis system based on triple modular redundancy architecture is firstly proposed to improve the reliability and safety of launch vehicle. After the liquid engine is ignited,the engine status is diagnosed by the onboard health diagnosis system according to the red line algorithm. Then,the solid propellant engine is ignited after it is confirmed that the liquid engine works under the normal condition. The results of ground engine test and flight test show that the engine health diagnosis system is accurate and reliable and can detect the working state of liquid engine timely and effectively without any false alarm or missing alarm.