三维自主再入制导方法

Three dimensional autonomous entry guidance method

基于阻力加速度-能量剖面设计,提出一种新的三维自主再入制导方法.该方法的阻力加速度-能量剖面由再入走廊上边界和下边界内插得到,倾侧角采用两次反转模式,轨迹规划同时考虑了飞行器的纵向和横向运动,并具有在线生成三维轨迹的能力.最后对制导方法的适应性进行了仿真分析,仿真结果表明给出的再入制导方法能适应不同情况的再入,使飞行器在具有较好轨迹特性的同时以较高的精度到达末端能量管理界面.

A new three dimensional autonomous entry guidance method designed based on drag acceleration versus energy profile is proposed. The drag acceleration versus energy profile is obtained by using the interpolation between the upper boundary and the lower boundary of the entry corridor, and the bank angle uses two reverse modes, and the trajectory planning considers the longitudinal and lateral movement, and can generate the three-dimensional entry flight trajectory on board. Finally, numerical simulations for the adaptability analysis of the entry guidance method are performed. Simulation results show that the entry guidance method proposed can adapt to different entry case, and can make the vehicle reach the terminal area energy management interface accurately with a good trajectory features.