摘要
针对航天器绕定轴旋转飞行时天线与地面测控站的非线性通联时长问题,在航天器本体上建立基础坐标系,将天线信号辐射范围简化为一个空间锥体,通过建立天线布局姿态与航天器本体的空间相对位置关系,以及建立地面测控站与航天器本体的空间相对位置关系,映射得到了天线布局姿态与测控站的通联时长关系模型。基于该模型,利用遗传算法,以通联时长最长为目标函数,对布置3个天线的航天器进行了优化。通过(0°,0°),(20°,30°)和(-20°,-30°)3组布置角度下天线通联各测控站时长的仿真计算,验证了模型的有效性。优化求解得到的3个天线的最优布置角度为(0°,1.23°),(65.36°,178.30°)和(-65.36°,-176.04°),天线通联信号覆盖比率为83.98%。
To solve the nonlinear communication time problem of the antennas and the ground stations when a spacecraft rotates along its fixed axis,a base coordinate system on the spacecraft was established and the signal radiation range of an antenna was simplified as a cone.By establishing the relative position relations between the antenna layout pose and the spacecraft base coordinate system and between the ground station position and the spacecraft base coordinate system,the relative position relation model of the antennas layout pose and the ground station position was established.Based on the established model,the poses of three antennas were optimized with the genetic algorithm to achieve the longest communication time.The numerical simulations of the communication time atlases with three sets of antennas(0°,0°),(20°,30°)and(-20°,-30°)verified the validity of the proposed models.The optimization result showed that the best poses of three antennas were(0°,1.23°),(65.36°,178.30°)and(-65.36°,-176.04°)and the largest communication time rate was 83.98%.
作者
刘宇哲
张群
杨勇
张新宇
彭慧莲
LIU Yuzhe;ZHANG Qun;YANG Yong;ZHANG Xinyu;PENG Huilian(Beijing Institute of Astronautical Systems Engineering,Beijng 100076)
出处
《载人航天》
CSCD
北大核心
2019年第6期771-778,共8页
Manned Spaceflight
关键词
火箭末级
天线布局
信号覆盖范围
遗传算法
final stage of launch vehicle
antennas layout
signal radiation range
genetic algorithm
