摘要
本文研究了在共面圆轨道HEO-LEO的过程中,气动辅助轨道转移飞行器(AOTV)在大气内飞行的极小时间控制问题。应用Pontriagin极大值原理导出了AOTV在大气内飞行的极小时间控制规律。以AOTV从地球同步轨道向同平面500公里高度圆轨道过渡为例,大气密度采用US.62标准大气密度,仿真结果表明,按照极小时间控制规律,AOTV一次经过大气层进入LEO需要的特征速度增量仅为纯推力Hohmann转移所需特征速度增量的43.8％,大气内飞行的时间约20分钟。
This paper considers the minimum-time control of aeroassisted orbital transfer vehicle (AOTV) which arises in the study of coplanar HEO-LEO orbital transfer. The open-loop optimal control law is derived by means of Pontriagin's maximum principle. An example that AOTV transfers from geosynchronistic orbit to coplanar 500 kilemeters high circular orbit is siumlated in which atmosphere density is based on the US. 62 Standard Atmosphere. The simulation result shows that the charactcristic velocity change required by aeroassisted orbita. transfer is only 43.8 % of that required by Hohmann transfer. The controlled flight time is about 20 minutes.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
1992年第4期9-16,共8页
Journal of Astronautics
基金
国家自然科学基金
关键词
轨道转移
系统控制
边值问题
Aeroassisted orbital transfer , Nonlinear system control, Control law, Two-point boundary value problem.
