TMT tertiary mirror passive support system conceptual design
-
摘要: TMT（Thirty Meter Telescope）望远镜是一台R-C式的30 m口径光学红外望远镜，其三镜为椭圆形平面镜，口径为3.594 m2.568 m，质量达到1.8 t，三镜系统需要把来自次镜的光折转到望远镜两侧耐氏平台上的一系列科学仪器上，具有跟踪和快速定向功能。支撑系统包括底支撑系统和侧支撑系统，根据TMT对三镜的面形要求，提出了底支撑系统采用18点Whiffletree结构，通过优化分析，面形RMS值达到118.5 nm。针对侧支撑系统，提出了基于kinematics原理的12点支撑方式，侧支撑作用下的面形RMS值为4.7 nm，两者综合作用下的面形RMS值优于77 nm。按照支撑系统方案，设计了一种满足一定质量和体积要求的支撑系统结构。Abstract: TMT(Thirty Meter Telescope) was a Ritchey Chrtien optical-infrared thirty meter telescope with 3.594 m2.568 m ellipse flat one and 1 800 kg weight. The tertiary mirror system reflected the light coming from the secondary mirror(M2S) to the science instruments which mounted on the telescope Nasmyth platforms. It had tracking and slewing functions. Tertiary mirror support system included axial support system and lateral support system. Based on the mirror surface figure error requirements, the paper proposed axial support system used 18 point whiffletree structure with surface figure RMS of 118.5 nm after optimum. The surface figure RMS can reach 4.7 nm by the lateral support, and the surface figure RMS was less than 77 nm by axial and lateral support. Based on this support program, the mirror support structure is designed to satisfy weighted and volume requirements.
-
Key words:
- TMT /
- tertiary mirror /
- support /
- conceptual design
-
[1] Silva David R, George Angeli, Corinne Boyer, et al. Thirty meter telescope: observatory software requirements, architecture, and preliminary implementation strategies[C]// SPIE, 2008, 7019: 789974-789992. [2] [3] Luc Simard, David Crampton, Brent Ellerbroek, et al. The TMT instrumentation program[C]// SPIE, 2010, 7735:857187-85192. [4] [5] Larry Stepp. Thirty meter telescope project update[C]//SPIE, 2012, 8444: 928006-928019. [6] [7] [8] Jerry Nelson, Sanders Gary H. The status of the thirty meter telescope project[C]//SPIE, 2008, 7012: 788238-788245. [9] [10] Ellerbroek Brent L, Adkins Sean M, Andersen David R, et al. TMT adaptive optics program status report[C]//SPIE, 2012, 8447: 927046-927054. [11] Wang Fuguo, Yang hongbo, Yang Fei, et al. Optimization and analysis for the axis support points position of the large aperture mirrors[J]. Infrared and Laser Engineering, 2007, 36(6): 877-880. (in Chinese)王富国, 杨洪波, 杨飞, 等. 大口径主镜轴向支撑点位置优化分析[J]. 红外与激光工程, 2007, 36(6): 877-880. [12] [13] [14] 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. [15] [16] Cho Myung K. Performance Prediction of the TMT Tertiary Mirror Support System[C]//SPIE, 2008, 7018: 169. [17] Kaercher H J, Peter Eisentraeger, Martin S. Mechanical principles of large mirror supports[C]//SPIE, 2010, 7733: 77332O-1-12. [18] [19] [20] Wang Baoxu, Wu Fan, Jiang Shilei, et al. Opto-mechanical analysis and structure optimization of infrared cassegrain optical system[J]. Infrared and Laser Engineering, 2012, 41(7): 1872-1878. (in Chinese)汪宝旭, 伍凡, 蒋世磊, 等. 卡式红外光学系统光机分析与结构优化[J]. 红外与激光工程, 2012, 41(7): 1872-1878. [21] Fan Lili, Zhang Jingxu, Jiang Hao, et al. Design of primary mirror support of equatorial telescope[J]. Infrared and Laser Engineering, 2011, 40(3):476-479. (in Chinese)范李立, 张景旭, 姜皓, 等. 极轴式望远镜主镜支撑设计[J]. 红外与激光工程, 2011, 40(3): 476-479. -
点击查看大图
计量
- 文章访问数: 332
- HTML全文浏览量: 59
- PDF下载量: 165
- 被引次数: 0
下载:
