Parameter optimization of 3 m aperture space-based mirror

Wang Xiaoyong; Zhang Bowen; Guo Chongling; Liu Pai

doi:10.3788/IRLA201948.S118002

Surface shape accuracy under gravity is an important aspect of space-based mirror performance. A 3 m aperture space-based mirror was optimized based on the parametric model of mirror structure and support point distribution, taking the surface shape RMS under the action of gravity as the object function. Firstly, the number and location of the support points were determined by using the classical theoretical formula, and the structure of the mirror was designed preliminarily. Secondly, according to the lightweight characteristics of the mirror and the kinematics design of the support system, the parameterized model of the mirror structure and the support points' distribution was established. Finally, the process integration and process automation of mirror component optimization were realized by using Isight software, and the relationship between the shape accuracy under gravity and various parameters was studied. The results show that the RMS value of the optimized mirror is 86.7 nm, which is 66.6% less than that of the preliminary design 259.4 nm, and meets the requirements of the project. The proposed optimization method combines with the kinematic model of the support system, and provides a comprehensive and efficient new approach for the optimization of large aperture mirrors with similar lightweight structure and support schemes.

Parameter optimization of 3 m aperture space-based mirror

1. Beijing Institute of Space Mechanics and Electricity,Beijing 100094,China

Received Date: 2018-12-13

Rev Recd Date: 2019-01-24

Publish Date: 2019-04-25

Key words:

Abstract: Surface shape accuracy under gravity is an important aspect of space-based mirror performance. A 3 m aperture space-based mirror was optimized based on the parametric model of mirror structure and support point distribution, taking the surface shape RMS under the action of gravity as the object function. Firstly, the number and location of the support points were determined by using the classical theoretical formula, and the structure of the mirror was designed preliminarily. Secondly, according to the lightweight characteristics of the mirror and the kinematics design of the support system, the parameterized model of the mirror structure and the support points' distribution was established. Finally, the process integration and process automation of mirror component optimization were realized by using Isight software, and the relationship between the shape accuracy under gravity and various parameters was studied. The results show that the RMS value of the optimized mirror is 86.7 nm, which is 66.6% less than that of the preliminary design 259.4 nm, and meets the requirements of the project. The proposed optimization method combines with the kinematic model of the support system, and provides a comprehensive and efficient new approach for the optimization of large aperture mirrors with similar lightweight structure and support schemes.

HTML

Reference (10)

[1]	Oegerle W R, Feinberg L D, Purves L R, et al. ATLAST-9.2 m:a large-aperture deployable space telescope[C]//SPIE, 2010, 7731:77312M.
[2]	Li Zongxuan, Jin Guang, Zhang Lei, et al. Overview and outlook of monolithic primary mirror of spaceborne telescope with 3.5 m aperture[J]. Chinese Optics, 2014, 7(4):532-541. (in Chinese)李宗轩, 金光, 张雷, 等. 3.5 m口径空间望远镜单块式主镜技术展望[J]. 中国光学, 2014, 7(4):532-541.
[3]	Zhang Dongge, Zhuo Renshan, Li Yaobin. Surrogate models based optimization methods for the axial support points of the primary mirror[J]. Infrared and Laser Engineering, 2012, 41(2):409-414. (in Chinese)张东阁, 卓仁善, 李耀彬. 反射镜轴向支撑位置优化的代理模型方法[J]. 红外与激光工程, 2012, 41(2):409-414.
[4]	Wang Shuxin, Li Jinglin, Zhang Fan, et al. Optimization of large aperture space reflector based on RSM[J]. Infrared and Laser Engineering, 2013, 42(S2):291-297. (in Chinese)王书新, 李景林, 张帆, 等. 响应面模型的大口径空间反射镜优化[J]. 红外与激光工程, 2013, 42(S2):291-297.
[5]	Wang Kejun, Xuan Ming, Dong Jihong, et al. Design method of reflector component structureof space remote sensor[J]. Infrared and Laser Engineering, 2016, 45(11):1113001. (in Chinese)王克军, 宣明, 董吉洪, 等. 空间遥感器反射镜组件结构设计方法[J]. 红外与激光工程, 2016, 45(11):1113001.
[6]	Willian R Arnold, Matthew Fitagerald, Rubin Jaca Rosa, et al. Next generation lightweight mirror modeling software[C]//SPIE, 2013, 8836:883601.
[7]	Arnold W R, Bevan R M, Stahl H P. Integration of mirror design with suspension system using NASA's new mirror modeling software[C]//SPIE, 2013, 8836:88360J.
[8]	Yoder P R. Opto-Mechanical Systems Design[M]. Zhou Haixian, Cheng Yunfang, translated. Beijing:China Machine Press, 2008. (in Chinese) Yoder P R. 光机系统设计[M]. 周海宪, 程云芳, 译. 北京:机械工业出版社, 2008.
[9]	Zhang Bowen, Wang Xiaoyong, Zhao Ye, et al. Porgress on support technique of space-basedlarge aperture mirror[J]. Infrared and Laser Engineering, 2018, 47(11):1113001. (in Chinese)张博文, 王小勇, 赵野, 等. 天基大口径反射镜支撑技术的发展[J]. 红外与激光工程, 2018, 47(11):1113001.
[10]	Liu Tao, Zhou Yiming, Jiang Yuesong. Research and application of foreign space mirror materials[J]. Spacecraft Recovery and Remote Sensing, 2013, 34(5):90-99. (in Chinese)刘韬, 周一鸣, 江月松. 国外空间反射镜材料及应用分析[J]. 航天返回与遥感, 2013, 34(5):90-99.

Parameter optimization of 3 m aperture space-based mirror

doi: 10.3788/IRLA201948.S118002

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views