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Tip-Tilt Motion Control of Fast Steering Mirror in the Giant Magellan Telescope (GMT)

[+] Author Affiliations
Taekyung Lee, Hyo-Sung Ahn

Gwangju Institute of Science and Technology, Gwangju, South Korea

Young-Soo Kim, Kwijong Park

Korea Astronomy and Space Institute, Daejeon, South Korea

Paper No. DETC2011-48041, pp. 717-726; 10 pages
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 3: 2011 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications, Parts A and B
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5480-8
  • Copyright © 2011 by ASME


This paper develops a tip-tilt motion controller of fast steering mirror (FSM) in the Giant Magellan telescope (GMT). A mathematical model of tip-tilt motion system of FSM is derived, and then based on this model, stability analysis is carried out. A heuristic adaptive controller is designed for the tip-tilt motion control with modeling error. The heuristic controller consists of two different adaptations such as initial adaptive control and adaptation at steady state errors . Through numerical simulations, the validity of the controller is illustrated. After that this paper addresses several practical issues like disturbance from wind, actuator saturation and resonance frequency from mechanical structure in implementing the controller to the actual system.

Copyright © 2011 by ASME



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