摘要
采用类似于航天飞机的末端能量管理段飞行轨迹结构,将可重复使用空间飞行器(RLV)飞行轨迹分为搜索飞行、航向校正以及预着陆飞行三段进行待飞距预测,并利用三次多项式表示飞行器高度-待飞距剖面。通过调节航向校正锥位置和半径的方法调整待飞距,提出了RLV末端能量管理段飞行轨迹的实时生成算法。该算法考虑了整个末端能量管理飞行阶段的轨迹约束,给定末端能量管理段的起始条件,能实时筛选并生成一条满足要求的参考轨迹线。计算结果验证了该方法的合理性。
Utilizing the basic structure of the shuttle＇ s terminal area energy management （TAEM） trajectory planning, the trajectory of a reusable launch vehicle （RLV） in the TAEM flight is divided into acquisition, heading alignment and prefinal phase for ground track range （GTR） prediction, the altitude-vs-GTR profile is defined as a cubic polynomial, the GTR is regulated through adjustment of the location and radius of the heading alignment cone （HAC）. Based on these, a on-line TAEM trajectory planning algorithm is developed, the algorithm is able to generate a reference trajectory which satisfy the TAEM requirement, trajectory constraints such as dynamic pressure, load factor and Mach number at the start of HAC turn can be easily treated in the algorithm.
出处
《飞行力学》
CSCD
北大核心
2007年第2期21-24,29,共5页
Flight Dynamics
关键词
可重复使用空间飞行器
末端能量管理
航向校正锥
参考轨迹
reusable launch vehicle
terminal area energy management
heading alignment cone
reference trajectory
