The invention relates to a method and system for calculating an imaging drift angle in forward and reverse bidirectional push-broom motion, which are suitable for the field of high-resolution earth remote sensing observation, and an observation satellite has attitude control of active rotation angular velocity on three axes in a remote sensing imaging process. According to the method, the current target attitude of an imaging satellite is selected as a reference, drift angle calculation of forward push-broom imaging and reverse push-broom imaging along the flight path of the satellite is carried out, splicing of multiple strips in a single imaging interval can be realized, and the imaging breadth of the camera is greatly expanded. In the forward and reverse push-broom process, firstly, increments of drift angles of different methods are calculated, the increments of the drift angles are converted into an attitude matrix to update a target attitude matrix, and the updated attitude matrix is used as a target attitude matrix for attitude control. Tracking control over the target attitude is achieved through attitude control, and the attitude control performance in the reverse push-broom process is improved.
本发明涉及一种正反双向推扫动中成像偏流角计算方法及系统,适用于高分辨率对地遥感观测领域,其观测卫星在遥感成像过程中三轴均具有主动旋转角速度的姿态控制。本发明选取成像卫星当前目标姿态为基准,进行了沿卫星飞行轨迹正向推扫和反向推扫成像的偏流角计算,能够实现单次成像区间多条带拼接极大的拓展了相机成像幅宽。在正反向推扫过程中,首先计算了不同方法的偏流角的增量,将偏流角的增量转化为姿态矩阵更新目标姿态矩阵,并将更新后的姿态矩阵作为姿态控制的目标姿态矩阵。通过姿态控制实现对目标姿态的跟踪控制,提升了反向推扫过程中的姿态控制性能。
Method and system for calculating imaging drift angle in forward and reverse push-broom motion
一种正反双向推扫动中成像偏流角计算方法及系统
31.12.2021
Patent
Elektronische Ressource
Chinesisch
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