大型光电望远镜在空间目标探测和天文观测中发挥的作用越来越大,它的探测能力、指向精度是影响其发展的主要因素。首先分析了影响望远镜指向精度的各个误差,然后根据多体系统理论,构造望远镜拓扑结构,在此基础上建立其空间误差指向模型。根据得到的指向误差模型,分析研究了三轴误差对方位测角误差和俯仰测角误差的影响。区别于传统球谐方法,该误差指向模型更全面的综合了各项误差,对进一步的误差分配和误差补偿具有一定的指导意义。

Large photo-electricity telescope plays a more and more important role in exploring objects in the space and astronomy observation, its detectivity and pointing precision are the main factors that affecting its development. Firstly, detailed analysis on different errors affecting the pointing precision of the telescope was conducted in the paper; then topology of the telescope was constructed and the spatial error pointing model was established based on multi-system theory; finally the relation between three axis differences and angle measurement errors was researched. Compared with traditional spherical function, a comprehensive item of errors were contained in the model which provided reference for error distribution and error correction.