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Advantage of a predictive control law for extreme adaptive optics imaging

Published online by Cambridge University Press:  02 May 2006

B. Le Roux  and
M. Carbillet
B. Le Roux
Affiliation:
INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi, I-50125 Firenze email: [email protected]
M. Carbillet
Affiliation:
LUAN-UMR 6525, Université de Nice-Sophia Antipolis, Parc Valrose, F-06108 Nice cedex 2 email: [email protected]
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Abstract

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We study the application of a predictive control law based on a Kalman filter for an extreme adaptive optics system. In particular, we discuss the minimization of temporal error and show the evolution of prediction errors with the order of the model. We also discuss the choice of the optimal temporal frequency as a function of the control law and the level of noise. Finally, the gain expected with respect to a non-predictive law is presented.

Keywords

atmospheric effects; instrumentation: adaptive optics; stars: imaging
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C200: Direct Imaging of Exoplanets: Science & Techniques , October 2005 , pp. 597 - 602
Copyright
© 2006 International Astronomical Union