光学精密工程2009，Vol.17Issue(10)：2401-2405,5.
1 m望远镜俯仰轴系精度检测误差的修正
Modification of altitude axis errors for 1 m aperture telescopes
摘要
Abstract
Altitude axis precision is important to the performance of a large aperture telescope.At practice,the tested result can not reach the system requirement,but the performance is well enough,so there must be error factors caused by centerpart deformation that can be eliminated in this system.To improve the accuracy of an altitude axis precision model,the centerpart,a main part effeting altitude axis precision is analyzed by the Finite Element Method (FEM),and then the curve of altitude axis max deformation versus pitch angle is obtained.After analyzing the influence of deformation on the axis precision,a modification method is proposed,which uses a compensation method to add the tested results to the calculated results.By this way,the PV error and the RMS error of axis shake are reduced from 2.42" to 0.95" and from 0.7"to 0.3",respectively.The method can improve the accuracy of the system precision model,and can provide theoratical basis for design and test of an even larger telescope.关键词
1m望远镜/四通/俯仰轴系精度/有限元法/误差补偿Key words
1 m aperture telescope/centerpart/altitude axis precision/Finite Element Method (FEM)/error compensation分类
机械制造引用本文复制引用
赵勇志,张景旭,吴小霞,施龙..1 m望远镜俯仰轴系精度检测误差的修正[J].光学精密工程,2009,17(10):2401-2405,5.基金项目
中国科学院三期创新工程资助项目 （）
