运载火箭推力故障下的弹道重构策略研究

Trajectory Reconfiguration Strategy Research on Launch Vehicle with Thrust Failure

面对发动机推力下降故障对运载火箭发射任务可靠性和安全性带来的重大挑战,研究一种基于迭代制导算法的弹道重构策略。通过预先设计救援轨道及飞行诸元、编排诸元切换策略,在完成故障识别和能力预测后,在线切换制导诸元,由迭代制导完成弹道重构,将有效载荷送入救援轨道。将其应用于某型运载火箭进行数学仿真,结果表明该方法能有效提升运载火箭控制系统对推力下降故障的适应能力、提高发射任务可靠性,且易于实现,具有较强的工程应用价值。

In view of the significant challenge from thrust decline to the reliability and safety of launch vehicle,a trajectory reconfiguration based on iterative guidance is researched.The rescue orbit,flight data and switching strategy are predesigned.After the fault diagnosis and capability prediction,the payload is sent to rescue orbit by the online data-switching and trajectory reconfiguration based on iterative guidance.Simulation results of a launch vehicleshow that the proposed method can effectively improve the fault adaptability and the mission reliability,which is easy to implement and has strong engineering application value.