Title
Primary mirror control for large segmented telescopes: Combining high performance with robustness
Author
Witvoet, G.
Doelman, N.J.
den Breeje, R.
Contributor
Marshall, H.K. (editor)
Hall, H.J. (editor)
Gilmozzi, R. (editor)
Publication year
2016
Abstract
Future large telescopes, such as E-ELT and TMT, will need feedback control of the thousands of actuators underneath their segmented primary mirrors (M1). Differences in actuator dynamics and spatially and temporally changing disturbances make it extremely diffcult to formulate classical controllers which are both suffciently robust and highly performing. Therefore, TNO has developed and tested a control approach, in which the actual system response is quickly measured, disturbances are continuously estimated and the controller is adapted in real-Time. The algorithm is tested on an actual M1-relevant setup, in which it converges to a sub-nm optimum within a few minutes, keeps track of changing disturbances and shows its reliability over multiple days.
Subject
Nano Technology
OM - Opto-Mechatronics
TS - Technical Sciences
High Tech Systems & Materials
Electronics
Industrial Innovation
Adaptive control
E-ELT
Feedback control
Airborne telescopes
Controllers
Feedback control
Mirrors
Robust control
Actuator dynamics
Classical controllers
Large telescopes
Position actuators
Segmented mirror
Segmented primary mirrors
Segmented telescope
To reference this document use:
http://resolver.tudelft.nl/uuid:20234e93-e5aa-46cd-bade-44ace8c0d3d6
TNO identifier
575362
Publisher
SPIE
ISBN
9781510601918
ISSN
0277-786X
Source
Ground-Based and Airborne Telescopes VI, 26 June - 1 July 2016, 9906
Series
Proceedings of SPIE - The International Society for Optical Engineering
Article number
990611
Document type
conference paper