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Proceedings Paper

Control of deformable mirrors in MOAO using H∞ optimization
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Paper Abstract

We present a new approach for the control of a deformable mirror (DM), part of a Multi Object Adaptive Optics (MOAO) on-sky demonstrator. The control is based on H synthesis methods, achieving better performance than classical Proportional-Integral methods, while offering other appealing advantages such as an optimized design based on the temporal spectra of the wavefront and vibration rejection capabilities. We describe laboratory results obtained with a 97 actuator Xinetics DM, using a high-resolution Shack-Hartmann wavefront sensor for measuring DM surface. A connection between the turbulence dynamics represented in a Zernike basis and the controller requirements is studied, showing that the controller parameters and structure can be easily optimized for each Zernike mode according to their particular temporal spectra.

Paper Details

Date Published: 17 September 2009
PDF: 12 pages
Proc. SPIE 7439, Astronomical and Space Optical Systems, 74390N (17 September 2009); doi: 10.1117/12.826081
Show Author Affiliations
Andrés Guesalaga, Pontificia Univ. Católica de Chile (Chile)
Dani Guzman, Univ. of Durham (United Kingdom)
Richard Myers, Univ. of Durham (United Kingdom)
Tim Morris, Univ. of Durham (United Kingdom)
Nigel Dipper, Univ. of Durham (United Kingdom)
Alastair Basden, Univ. of Durham (United Kingdom)

Published in SPIE Proceedings Vol. 7439:
Astronomical and Space Optical Systems
Penny G. Warren; James B. Heaney; Robert K. Tyson; Michael Hart; E. Todd Kvamme; Cheryl J. Marshall, Editor(s)

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