RLV末端能量管理段三维鲁棒制导方法

Due to the traditional terminal area energy management (TAEM) guidance methods for a reusable launch vehicle (RLV) showing low precision and poor robustness, a 3D guidance strategy with real-time correction is proposed for improving the guidance performance in terms of precision and robustness. Firstly, the RLV time-domain-based guidance model is transformed to the altitude-domain-based dynamic equations. A sliding mode guidance law is designed to generate the RLV trajectories and guidance commands in the presence of hybrid constraints. The guidance command is then regarded as the input of the time-domain-based guidance model. After a guidance period, the command is updated according to the current flight states against the influences of the disturbances on aerodynamic, atmosphere, and vehicle mass. Simulation results show good performance of the proposed guidance method.