Share Email Print
cover

Proceedings Paper • new

Experimental study of breakaway system for the fast-steering secondary mirror prototype of GMT
Author(s): Yunjong Kim; Wongi Lee; Chanhee Lee; Myung K. Cho; Christoph Dribusch; Sungho Lee; Sanghyuk Kim; Chang-Hee Kim; Ueejeong Jeong; Jeong-Yeol Han; Bong-Kon Moon; Chan Park; Byeong-Gon Park; Youra Jun; Jieun Ryu; Gary Poczulp; Ming Liang; Il-Kwon Moon; Ho-Sang Kim; Paul Gardner; Robert Bernier; Frank Groark; Hugo Chiquito
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The Fast-steering Secondary Mirror (FSM) of Giant Magellan Telescope (GMT) consists of seven 1.1 m diameter circular segments with an effective diameter of 3.2 m, which are conjugated 1:1 to the seven 8.4 m segments of the primary. Each FSM segment contains a tip-tilt capability for fast guiding to attenuate telescope wind shake and mount control jitter by adapting axial support actuators. Breakaway System (BAS) is installed for protecting FSM from seismic overload or other unknown shocks in the axial support. When an earthquake or other unknown shocks come in, the springs in the BAS should limit the force along the axial support axis not to damage the mirror. We tested a single BAS in the lab by changing the input force to the BAS in a resolution of 10 N and measuring the displacement of the system. In this paper, we present experimental results from changing the input force gradually. We will discuss the detailed characteristics of the BAS in this report.

Paper Details

Date Published: 10 July 2018
PDF: 9 pages
Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107064A (10 July 2018); doi: 10.1117/12.2311779
Show Author Affiliations
Yunjong Kim, Korea Astronomy and Space Science Institute (Korea, Republic of)
Wongi Lee, Institute for Advanced Engineering (Korea, Republic of)
Chanhee Lee, Institute for Advanced Engineering (Korea, Republic of)
Myung K. Cho, National Optical Astronomy Observatory (United States)
Christoph Dribusch, The Univ. of Arizona (United States)
Sungho Lee, Korea Astronomy and Space Science Institute (Korea, Republic of)
Sanghyuk Kim, Korea Astronomy and Space Science Institute (Korea, Republic of)
Chang-Hee Kim, Korea Astronomy and Space Science Institute (Korea, Republic of)
Ueejeong Jeong, Korea Astronomy and Space Science Institute (Korea, Republic of)
Jeong-Yeol Han, Korea Astronomy and Space Science Institute (Korea, Republic of)
Bong-Kon Moon, Korea Astronomy and Space Science Institute (Korea, Republic of)
Chan Park, Korea Astronomy and Space Science Institute (Korea, Republic of)
Byeong-Gon Park, Korea Astronomy and Space Science Institute (Korea, Republic of)
Youra Jun, The Univ. of Arizona (United States)
Jieun Ryu, National Optical Astronomy Observatory (United States)
Gary Poczulp, National Optical Astronomy Observatory (United States)
Ming Liang, National Optical Astronomy Observatory (United States)
Il-Kwon Moon, Korea Research Institute of Standards and Science (Korea, Republic of)
Ho-Sang Kim, Institute for Advanced Engineering (Korea, Republic of)
Paul Gardner, GMTO Corp. (United States)
Robert Bernier, GMTO Corp. (United States)
Frank Groark, GMTO Corp. (United States)
Hugo Chiquito, GMTO Corp. (United States)


Published in SPIE Proceedings Vol. 10706:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III
Ramón Navarro; Roland Geyl, Editor(s)

© SPIE. Terms of Use
Back to Top