Control of deformable mirrors in MOAO using H&#8734; optimization

Andrés Guesalaga; Dani Guzman; Richard Myers; Tim Morris; Nigel Dipper; Alastair Basden

doi:10.1117/12.826081

17 September 2009 Control of deformable mirrors in MOAO using H_∞ optimization

Andrés Guesalaga, Dani Guzman, Richard Myers, Tim Morris, Nigel Dipper, Alastair Basden

Proceedings Volume 7439, Astronomical and Space Optical Systems; 74390N (2009) https://doi.org/10.1117/12.826081
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

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.

Citation Download Citation

Andrés Guesalaga, Dani Guzman, Richard Myers, Tim Morris, Nigel Dipper, and Alastair Basden "Control of deformable mirrors in MOAO using H_∞ optimization", Proc. SPIE 7439, Astronomical and Space Optical Systems, 74390N (17 September 2009); https://doi.org/10.1117/12.826081

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