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针对1m太阳望远镜主光学系统光轴与其光电导行系统光轴在望远镜跟踪过程中的相对变化对光电导行跟踪精度的影响,从望远镜的光机电系统结构出发,分析了光电导行闭环跟踪时光轴变化引入的跟踪误差变化规律,提出了光轴变化的检测方法。经过实测表明,光轴的最大相对变化是46″,且变化只与望远镜指向的高度角有关,与望远镜指向的方位角无关,结构重力变形是引起光轴变化的主要因素。在光电导行系统中引入光轴变化的软件修正模型来改善光轴变化引起的光电导行闭环长期跟踪误差。
Aiming at the influence of the relative change of the optical axis of the main optical system of the 1m solar telescope and the optical axis of its optical guiding system in the tracking process of the telescope on the tracking accuracy of the photoelectric guiding system, the optical-mechanical system structure of the telescope is analyzed. Axis variation introduced tracking error variation, put forward the optical axis change detection method. The measured results show that the maximum relative change of the optical axis is 46 ", and the change is only related to the height angle pointed by the telescope, which has nothing to do with the azimuth angle of the telescope, and the structure gravity deformation is the main factor causing the optical axis to change. The introduction of optical axis changes in the software correction model to improve the optical axis changes caused by long-term closed loop photoconductive tracking error.