亚轨道飞行器能量管理段轨迹设计

亚轨道飞行器（SRLV）通过跟踪特定的轨迹来实现对能量的控制与管理，轨迹设计是能量管理的一项关键技术。深入研究了亚轨道飞行器能量管理段（TAEM）轨迹的设计思想、准则和流程；提出了一种基于待飞距离规划动压剖面的轨迹设计方法，通过调整航向调整段的动压剖面，保证飞行器以亚声速状态进入航向调整段，避免飞行器转弯超调；提出了采用顺风作为轨迹设计的缺省状态，保证飞行器在严重的逆风状态下仍然可以满足着陆窗口约束；通过具体算例进行仿真分析，验证了设计方法的有效性。

Trajectory design for terminal area energy management of suborbital reusable launch vehicle

The energy of suborbital reusable launch vehicle (SRLV) is controlled and managed by flying along a specific path, so the method of trajectory design is a key technology for terminal area energy management (TAEM). The principle, criterion and process of trajectory design methodology for TAEM of SRLV are represented. An approach of reference dynamic pressure profile design based on distance-to-go is proposed. The subsonic state for entering heading alignment phase is ensured by adjusting the dynamic pressure at heading alignment phase, in this way the SRLV turning overshoot is avoided. In order to ensure the TAEM/approach and landing interface constraints to be met in the presence of severe headwinds, the reference dynamic pressure is designed in tailwind conditions as default. Finally, according to the example simulation analysis, the validity of the TAEM trajectory design method is proved.