RLV末端区域能量管理段轨迹设计研究

Research on trajectory design of terminal area energy management for reusable launch vehicle

针对重复使用运载器(RLV)无动力且升阻比较小、末端区域能量管理段(TAEM)初始不确定性大的特点,给出了一种基于多轨迹设计的在线轨迹选择方法。首先建立重复使用运载器的动力学模型和三自由度模型,其次给出飞行走廊设计方法来描述TAEM各类约束的范围,给出基于高度-待飞距离剖面的标称轨迹设计方法,分析单条轨迹的容忍能力生成轨迹数据库,确定轨迹在线选择逻辑,通过对比仿真验证在线重新选择轨迹的必要性和轨迹跟踪效果。

According to the Reusable Launch Vehicle （RLV）is unpowered and with low lift-to-drag ratio during Terminal Area Energy Management phase （TAEM）,this paper studies a new traj ectory design method based on number of trajectory.At first,this paper establishes 3DOF model of the sample RLV for trajectory design and simulation.Next,considering the flight task of TAEM,this paper design the flight corridor to express the restriction and also design the traj ectory based on height-fly distance.Then,the traj ectory data-base was built.At last,the nonlinear simulation environment is built in the MATLAB environment.The results show that the traj ectory online selection is reasonable and the traj ectory is robust.