Integrated system of azimuth structure for extremely large telescopes

Shou-wei HU; Xiao-li SONG; Hui ZHANG

doi:10.3788/OPE.20182604.0850

您当前的位置：

首页 >

文章列表页 >

Integrated system of azimuth structure for extremely large telescopes

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-07-05

- Integrated system of azimuth structure for extremely large telescopes
- Optics and Precision Engineering Vol. 26, Issue 4, Pages: 850-856(2018)
- 作者机构：
  
  1.中国科学院南京天文光学技术研究所, 江苏南京 210042
  2.中国科学院天文光学技术重点实验室, 江苏南京 210042
  3.中国科学院大学, 北京 100039
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182604.0850
  CLC： P111.2;TH751
- Received：01 September 2017，
  
  Accepted：15 October 2017，
  
  Published：25 April 2018
- 稿件说明：
移动端阅览
Shou-wei HU, Xiao-li SONG, Hui ZHANG. Integrated system of azimuth structure for extremely large telescopes[J]. Optics and precision engineering, 2018, 26(4): 850-856.
DOI：

Shou-wei HU, Xiao-li SONG, Hui ZHANG. Integrated system of azimuth structure for extremely large telescopes[J]. Optics and precision engineering, 2018, 26(4): 850-856. DOI： 10.3788/OPE.20182604.0850.

摘要

为了解决巨型望远镜潜在的结构变形对方位轴系支撑和精密驱动的影响，基于组合轴承和驱动车载的概念，提出了一种集成具有轴承及驱动两个功能的机械装置。此套机械装置采用了静液压油垫和直接驱动技术。直接驱动和液压油垫组合安装在承载机构上，可以减小电机间隙变化以便提高驱动系统的效率，此机械装置包含一套运动副连接，该连接允许底部静液压油垫与滑动导轨紧密贴合而上部连接到方位轴移动结构上（就方位轴而言），由此机械装置在运行时只会受到底部滑动轨道平整度的影响而不受上部移动结构大尺度变形的影响。之后通过ANSYS对机械装置进行了静力学仿真，以验证模型的准确性。分析结果证明：系统在设置运动副连接和未设置运动副连接两种情况下，施加

轴方向力矩时，关注点的位移由14.3

m减小为0.85

m；施加

轴方向力矩时，关注点的位移由12.9

m减小为1.26

m，运动副连接层可以显著吸收望远镜方位轴移动结构变形引起的力矩，从而不会将该作用力矩强加给静液压油垫和驱动系统。该项设计为巨型望远镜高精度轴系和精密驱动的研制提供了可靠的设计依据和技术支持。

Abstract

In order to reconcile large deformations of the azimuth structure for the Extremely Large Telescope(ELT)

an innovative mechanism based on hydrostatic bearings and linear drives was established and it combined both the bearing and drive functions. Placed motors close to hydrostatic bearings allowed a fairly constant air-gap to be maintained despite the dimensions of the structure. This allowed the motor to be designed with a relative small air-gap and consequently higher efficiency for a defined motor dimension. The connection of each of the frames to the mobile structure was through a kinematical connection

such that the lower part was properly positioned with respect to the track

while the upper part was connected to the azimuth structure (in the case of the azimuth mechanism). Thus the mechanism was only affected in performance by the small-scale deformation of the track and not by large-scale deformation of the structure. Then

the static analysis of the mechanism was simulated by ANSYS and verified its mechanical model. Analysis results indicate that the displacement of the point of concern decreases from 14.3

m to 0.85

m when the

-axis moment is applied in both cases of the mechanism with kinematical joint and without kinematical joint. When the

-axis moment is applied

the displacement of the point of interest decreases from 12.9

m to 1.26

m. The design can offer a reliable guidance and advanced technique paths for developing the high precision azimuth shafting and precision actuation of the extremely large telescope.

关键词

Keywords

references

QUATTRI M, DIMICHINO F, MARCHIORI G, et al.. VLT 8-m unit telescope main structure:design solutions and performance calculation[J]. SPIE, 1994, 2199:986-996.

European Southern Observatory. The VLT White Book[M]. ESO, 1998.

RAYBOULD K, GILLETT P E, HATTON P, et al.. Gemini telescope structure design[J]. SPIE, 1994, 2199:376-393.

MIYAWAKI K, ITOH N, SUGIYAMA R, et al.. Mechanical structure for the SUBARU Telescope[J]. SPIE, 1994, 2199:754-761.

MEDWADOWSKI S J. Structure of the keck telescope-An overview[C]. Proceedings of the International Symposium on Large Telescopes Japanese National Large Telescope and Related Engineering Developments, Springer, 1989:33-43.

张景旭.地基大口径望远镜系统结构技术综述[J].中国光学, 2012, 5(4):327-336.

ZHANG J X. Overview of structure technologies of large aperture ground-based telescopes[J]. Chinese Optics, 2012, 5(4):327-336. (in Chinese)

王槐, 代霜, 张景旭.大型地平式望远镜的方位轴系支撑结构[J].光学精密工程, 2012, 20(7):1509-1516.

WANG H, DAI SH, ZHANG J X. Azimuth shafting bearing structure in a large Alt-azimuth telescope[J]. Opt. Precision Eng., 2012, 20(7):1509-1516. (in Chinese)

SZETO K, ROBERTS S, GEDIG M, et al.. TMT telescope structure system:design and development[J]. SPIE, 2006, 6267:62672Q.

TSANG D, AUSTIN G, GEDIG M, et al.. TMT telescope structure system:seismic analysis and design[J]. SPIE, 2008, 7012:70124J.

NELSON J, SANDERS G H. The status of the thirty meter telescope project[J]. SPIE, 2008, 7012:70121A.

USUDA T, EZAKI Y, KAWAGUCHI N, et al.. Preliminary design study of the TMT Telescope structure system:overview[J]. SPIE, 2014, 9145:91452F.

JOHNS M, MCCARTHY P, RAYBOULD K, et al.. Giant Magellan telescope:overview[J]. SPIE, 2012, 8444:84441H.

BERNSTEIN R A, MCCARTHY P J, BIGELOW B C, et al.. Overview and status of the giant Magellan telescope project[J]. SPIE, 2014, 9145:91451C.

MARCHIORI G, BUSATTA A, GHEDIN L, et al.. The E-ELT project:the telescope main structure detailed design study[J]. SPIE, 2012, 8444:84440O.

GÍMEZ C, AVILÉS A, BILBAO A, et al.. E-ELT seismic devices analysis and prototype testing[J]. SPIE, 2012, 8449:844918.

SU D G, WANG Y N, CUI X Q. A configuration for future giant telescope[J]. Chinese Astronomy and Astrophysics, 2004, 28(3):356-366.

LI G P, YANG D H. Preliminary structure design and analysis of the Chinese Future Giant Telescope[J]. SPIE, 2004, 5495:204-215.

GUNNELS S. The Giant Magellan Telescope (GMT):hydrostatic constraints[J]. SPIE, 2010, 7733:77334Z.

The E-ELT Project Office. The E-ELT Construction Proposal[M]. München:European Southern Observatory, 2011.

TMT Observatory Corporation. TMT Construction Proposal[M]. Washington:TMT Observatory, 2007.

Views

684

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Thermal ablation law of nylon materials under laser irradiation

Driving-mode test of dual-mass MEMS gyroscope

Related Author

MENG Wen

HAN Xiao-fei

LI Yun-xia

LI Da

YIN Yong

WANG Shou-rong

WANG Cun-chao

YANG Bo

Related Institution

School of Information and Navigation, Air Force Engineering University

School of Instrument Science and Engineering, Southeast University

Department of Communication, Second Artillery Command College of the Chinese People’s Liberation Army

AI问答

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China Postal code：130033
Tel：0431-86176855 Email：gxjmgc@ciomp.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰