关键词: 亚轨道飞行器, 能量管理段, 轨迹设计, 能量走廊, 动压剖面

Abstract:

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.

Key words: suborbital reusable launch vehicle, terminal area energy management, trajectory design, energy corridor, dynamic pressure profile