光学卫星等比降地速的地影区主动推扫姿态规划  

Active Push-broom Attitude Planning for Optical Satellite with Proportional Ground-velocity Deceleration in Earth Shadow Region

作　　者：童鑫 钟兴 曲友阳 李文涛 李冬瑞 TONG Xin;ZHONG Xing;QU Youyang;LI Wentao;LI Dongrui(Chang Guang Satellite Technology Co.,Ltd,Changchun 130102,China)

机构地区：[1]长光卫星技术股份有限公司,长春130102

出　　处：《宇航学报》2023年第11期1746-1756,共11页Journal of Astronautics

基　　金：国家重点研发计划项目(2020YFA0714104);2022年度吉林省人才开发专项资金资助项目(220D506)。

摘　　要：针对光学推扫卫星在地影区进行夜间推扫成像时,卫星相机成像区域地速过快导致传感器积分时间不足而难以获取高质量夜间影像的情况,设计了一种卫星等比降地速主动推扫的姿态规划方法。首先,根据卫星推扫成像任务的机动时间、成像起始时刻与降速比例等参数计算出卫星等比降地速成像时的等效轨道初始位置;其次,根据卫星等效轨道初始位置与卫星侧摆角,通过轨道递推计算出卫星光轴实时指向的地面目标点坐标;然后,根据卫星实际的轨道位置与姿态解算出卫星指向地面目标点的实时期望姿态;最后,基于吉林一号高分04A卫星的参数对所设计方法进行数值仿真与在轨试验,结果表明了所提出的方法具有可行性与有效性。For the push-broom imaging in the shadow area,the ground speed of the imaging area of the optical pushbroom satellite is too fast,which makes it difficult to obtain high-quality night images.This paper designs an active ground velocity proportional reduction push-sweep imaging attitude planning method to address the issue of insufficient sensor integration time for the fast ground velocity.Firstly,the equivalent orbit initial position of the satellite for imaging with proportional ground velocity reduction is calculated based on parameters such as the maneuver time,imaging start time,and velocity reduction ratio of the push-broom imaging mission.Secondly,the real-time coordinates from the satellite optical axis to the ground target point are calculated by orbit propagation based on the equivalent orbit initial position and the attitude of satellite.Then,the real-time desired attitude of the satellite pointing to the ground target point is calculated based on the actual orbit position and attitude of satellite.Finally,numerical simulations and on-orbit tests of the proposed method are conducted by using the satellite parameters of Jilin-1-GF04A,and the results demonstrate the feasibility and effectiveness of the method.

关 键 词：光学卫星 等比降地速 主动推扫 轨道递推 地面目标点 姿态规划 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]