第18卷第12期 2010年12月
1004-924X(2010)12-2633-09
文章编号
光学精密工程
Optics and Precision Engineering
Vol.18No.12
Dec.2010
空间相机主次镜间的薄壁筒和支杆组合支撑结构
李威，刘宏伟，郭权锋，王海萍
(1.中国科学院长春光学精密机械与物理研究所，吉林长春130033）
摘要：为了满足大口径、长焦距空间相机中次镜相对于主镜的位置精度要求，设计并研制了主次镜间的支撑结构，分析和试验验证了组合支撑结构的稳定性。首先，根据给定的光学系统，确定了主次镜之间采用薄壁简和支杆组合的支撑结构形式，对比了支撑杆和薄壁简的结构形式以及二者之间的连接方式，通过优化，完成了组合支撑结构的设计。然后，讨论了重力对支撑结构的影响，并进行了固有频率和正弦振动响应分析。最后，通过量级逐增力学试验，采用光学方法测量了主、次镜间的角度变化量，验证了支撑结构的结构稳定性。试验结果表明：主、次镜间的角度变化量<10”、组合支撑结构的一阶基额>75Hz。这些结果满足主、次镜间角度变化量要求，具有较好的结构稳定性。
调：空阔相机；组合支撑结构结构稳定性；光学测量
关键
中图分类号：V475.3;TH703
文献标识码：A
doi:10, 3788/OPE, 20101812. 2633
Combinedsupportingstructureofthinwalljointcylinderand
supporting bar between primary mirror and
secondmirrorinspacecamera
LI Wei,LIU Hong-wei,GUO QUAN-feng,WANG HAI-ping(Changchun Institute of Optics,FineMechanics and Physics, ChineseAcademyofSciences,Changchun130033,China)
Abstract: To meet the relative position request of the second mirror and the primary mirror in a large aperture and long-focal-length space camera, a combined supporting structure between the primary mirror and the second mirror was designed and manufactured,and the stability of the combined sup-porting structure was confirmed through the analysis and tests. Firstly, according to the optical sys-tem,the combined supporting structure which combined a thin wall joint cylinder and a supporting bar was designed,The structure forms of supporting bar and joint cylinder were compared and their con nection modes were discussed. Then,the gravity response,characteristic frequency and sinusoidal vi-bration responses of the supporting structure were analyzed. Finally, the supporting structure stabili-ty was validated by the mechanical tests and optical measurement. The results indicate that the angle displacement between the primary mirror and the second mirror is less than lo" and the first-order nat-ural frequency of supporting structure is greater than 75 Hz,which shows that the supporting struc-
收稿日期：2010-03-04；修订日期：2010-05-10.
基金项目：国家自然科学基金资助项目（No.60507003）