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由于轻小型卫星光通信系统中潜望镜的光学结构随粗瞄机构姿态变化而发生改变,使得相应的跟踪算法变得较为复杂,本文对潜望镜式星间激光通信终端粗跟踪算法进行研究以提高粗瞄机构的跟踪精度。利用矩阵光学方法,建立了潜望镜式光通信终端中光学器件的矩阵模型,在获得CCD测角模型后,推导了基于CCD测角的粗瞄装置自动跟踪算法模型,实现了潜望镜式光通信终端粗瞄装置对目标光束的快速跟踪,并对模型进行了相应的实验验证。实验结果表明,该CCD测角跟踪模型正确地反应了实际终端中的光学传递关系,能够正确地对CCD图像位置信号进行处理并获得稳定跟踪角度,平均跟踪精度优于10μrad,满足卫星激光通信中稳定可靠、高精度粗跟踪的要求。本文提出的方法对类似的光学系统具有借鉴意义。
Since the optical structure of the periscope in the light and small satellite optical communication system changes with the attitude change of the coarse pointing mechanism, the corresponding tracking algorithm becomes more complicated. In this paper, the coarse tracking algorithm of the periscope-type interplanetary laser communication terminal is studied to improve the coarse pointing Agency’s tracking accuracy. The matrix model of optical devices in the periscope optical communication terminal was established by matrix optics method. After obtaining the CCD angle measurement model, the automatic tracking algorithm model of coarse sighting device based on CCD angle measurement was deduced. The periscope optical communication terminal coarse Aim at the fast tracking of the target beam, and experimentally verify the model. Experimental results show that the CCD goniometric tracking model correctly reflects the optical transfer relationship in the actual terminal and can correctly process the CCD image position signals and obtain a stable tracking angle with an average tracking accuracy of better than 10 μrad to meet satellite laser communications Stable and reliable, high-precision coarse tracking requirements. The method proposed in this paper has reference for similar optical systems.