可重复使用运载器连续推力轨迹回转机动方法研究

针对可重复使用运载器(RLV)原场返回过程中所面临的轨迹回转问题,提出了一种在亚轨道高度进行姿态调整并使飞行轨迹回转、指向发射场方向的机动方法.在RLV与上面级分离之后,利用RLV自身推力抵消背离发射场速度,最终使RLV飞行方向指向发射场并进入再入返回阶段.采用连续推力方案,利用最优控制理论推导得出满足轨迹回转终端要求的机动指令.仿真结果表明,该方法能够实现RLV与上面级分离后轨迹迅速回转,可为之后的返回原发射场提供保障.

Trajectory rotation method for RLV with continuous thrust

For the trajectory rotation problem of RLV during returning to launch site,a method to adjust attitude and return to launch site in suborbital altitude.After the RLV depart from the upper stage,the initial speed is canceled by its thrust.The RLV reverses towards the launch site and starts the re-entry phase.Using the continuous thrust scheme,the pitching angle guidance instruction was derived based on the optimal control theory.Simulation results show that this method can make the trajectory rotation quickly and provide support for the re-entry phase.