天基遥感中航天器挠性对成像区域的影响

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Title:

Influence of spacecraft flexibility on imaging area in space remote sensing

作者:

邹纫秋¹, 张加友², 宋祥帅², 谢亚恩², 吴限德²

1. 北京航天长征飞行器研究所, 北京 100076;
2. 哈尔滨工程大学 航天与建筑工程学院, 黑龙江 哈尔滨 150001

Author(s):

ZOU Renqiu¹, ZHANG Jiayou², SONG Xiangshuai², XIE Yaen², WU Xiande²

1. Beijing Institute of Space Long March Vehicle, Beijing 100076;
2. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China

关键词:

遥感卫星; 成像观测; 挠性附件; 有限元法; 拉格朗日法; 敏捷卫星; 成像区域; 星地几何

Keywords:

remote sensing satellite; imaging observation; flexible appendix; finite element method; Lagrange method; agile satellite; imaging region; satellite earth geometry

分类号:

TP73

DOI:

10.11992/tis.202203043

摘要:

针对遥感敏捷卫星机动模式对地成像观测，分析挠性附件振动对卫星成像区域和质量的影响。首先利用有限元法和拉格朗日法建立带挠性附卫星的动力学模型；然后通过星地几何法计算成像条带；最后分别选取太阳同步轨道和地球同步轨道，以两个对称的太阳能帆板作为挠性附件，给出数值仿真结果。仿真结果表明，卫星机动完成后，成像区域横滚方向与俯仰方向均偏差较大，导致成像区域错位；太阳帆板振动对成像区域的影响随着其振动减弱而减弱，并逐渐趋于稳定。卫星轨道高度越高，扰动对于卫星成像区域的影响越大，需要更长时间稳定自身姿态。

Abstract:

Aiming at the earth imaging observation of remote sensing agile satellite maneuvering mode, the influence of flexible accessory vibration on satellite imaging area and quality is analyzed in this paper. Firstly, the dynamics model of satellite with flexible appendage is established by using finite element method and Lagrange method; Then, the imaging strip is calculated by satellite earth geometry method; Finally, the numerical simulation results are derived by selecting the sun-synchronous orbit and geostationary orbit as examples, and using two symmetrical solar panels as flexible accessories. The simulation results show that after the satellite maneuver is completed, the deviation between the roll direction and the pitch direction of the imaging area is large, resulting in dislocation of the imaging area; The influence of solar panel vibration on the imaging area decreases with the weakening of its vibration, and tends to stability gradually. The higher the altitude of satellite orbit, the greater the impact of disturbance on the satellite imaging area, which takes longer time to stabilize the attitude.