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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Analysis and Control of Attitude Motion for Rapid Regional Scanning Earth Observations
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Analysis and Control of Attitude Motion for Rapid Regional Scanning Earth Observations

机译：快速区域扫描地球观测的姿态运动分析与控制

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摘要

Normal Earth observation satellites operate under a nadir-pointing stabilization mode. The effective swath width of observation is limited by the camera's field-of-view (FOV). In order to achieve continuous and wide swath coverage, a rapid regional scanning observation mode is proposed and analyzed in this paper. Periodic maneuvering about the roll axis is needed to fulfill the mission requirement. A zigzag-like trajectory is developed as a tracking reference trajectory. A sliding mode control algorithm is exploited to achieve high-precision tracking performance. Then, a mixed steering logic utilizing two symmetric-configured control moment gyros (CMG) and three orthogonal-placed magnetic torquers (MTQ) is proposed. CMGs provide large torque for rapid roll maneuvering, and MTQs help to compensate pitch angular velocity bias introduced by the orbital motion. The feasibility of the proposed strategy is verified through numerical simulations. Moreover, this strategy will be further demonstrated on the fourth small satellite, named TSUBAME, designed by the Laboratory of Space Systems at the Tokyo Institute of Technology. TSUBAME is equipped with an ultra-small optical camera designed by the Kimura Laboratory at Tokyo University of Science.
机译：正常的地球观测卫星在最低点稳定模式下运行。观察的有效条幅宽度受相机的视野（FOV）限制。为了实现连续和广泛的覆盖范围，本文提出并分析了快速区域扫描观测模式。需要围绕侧倾轴​​线进行定期操纵才能满足任务要求。之字形轨迹被开发为跟踪参考轨迹。利用滑模控制算法来实现高精度的跟踪性能。然后，提出了一种混合转向逻辑，利用两个对称配置的控制力矩陀螺仪（CMG）和三个正交放置的磁扭矩器（MTQ）。 CMG为快速滚动操作提供了大扭矩，而MTQ则有助于补偿由轨道运动引起的俯仰角速度偏差。通过数值模拟验证了所提策略的可行性。此外，该策略将在东京工业大学空间系统实验室设计的第四颗名为TSUBAME的小型卫星上得到进一步证明。 TSUBAME配备了由东京科学大学木村实验室设计的超小型光学相机。

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