卫星光通信终端二维转台运动参量对天线指向影响研究  

Research on the Influence of the Motion Parameters of the Satellite Optical Communication Terminal's Gimbals on Antenna Pointing Error

作　　者：刘剑峰[1] 韩琦琦[1] 于思源[1] 马晶[1] 谭立英[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室光电子研究所,哈尔滨150001

出　　处：《宇航学报》2007年第4期926-931,共6页Journal of Astronautics

摘　　要：二维转台与卫星平台间的耦合运动,是影响卫星光通信终端天线指向控制的重要因素。在耦合动力学模型基础上,研究了二维转台不同运动参量对光通信终端天线指向偏差的影响。分析结果表明:在耦合动力学环境下,光束指向偏差随二维转台转动成规律性变化;当方位轴、俯仰轴转角θh、θv分别为(π,0)、(-π,0)时,指向偏差出现最大值;随二维转台转动时间的增加,天线指向偏差略有增加,转动时间由10s增加到1000s时增幅仅为1%。其结果为补偿耦合运动影响,保证天线指向控制精度,提高卫星光通信终端星上应用的稳定性打下基础。The coupled motion between the gimbals of the optical terminal and satellite platform is the key factor to influence the antenna pointing control process of the satellite optical communication （SOC） terminal. In this paper, based on the satellite attitude dynamics, we studied the antenna pointing error induced by the coupled motions under different parameters of the gimbals motion. The analysis results indicated the antenna pointing error change regularly with increase of the rotation angle of the gimbals, and reach the max value when the azimuth angle and elevation angle are （π ,0） and （ - π ,0） separately. With increase of the rotation time, the pointing error increase slowly. The amplification of the pointing error is only 1% with the rotation time change from 10s to 1000s. The results of this paper are the basis of the antenna pointing error compensation research and will improve the stability of the SOC system applied on the satellite platform.

关 键 词：卫星光通信 卫星姿态动力学 耦合运动 天线指向控制 

分 类 号：TN929.13[电子电信—通信与信息系统]