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Proceedings Paper

Anti-windup control of tip-tilt mirror
Author(s): Jean-Pierre Folcher
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Paper Abstract

In the context of next generation instrumentation for current telescope and future Extremely Large Telescopes (ELT), the requirements on the correction of the tip-tilt modes are stringent. In a strong turbulence situation and in the presence of structural vibration of the telescope, tip-tilt mirror saturation phenomena can occur, which can degrade the performance or even destabilize the feedback system that is denoted the windup" effects. In this paper we investigate a control strategy which aims to mitigate the undesirable windup" effects. The approach gives possibilities to ensure the performance of a relevant anti-windup" control strategy invoking the small gain theorem and using the H optimization framework. The proposed control method, based on Hoptimization, guarantees the stability and performance of the tip-tilt loop.

Paper Details

Date Published: 7 August 2014
PDF: 8 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91484H (7 August 2014); doi: 10.1117/12.2056357
Show Author Affiliations
Jean-Pierre Folcher, Lab. Lagrange, CNRS, Univ. de Nice Sophia Antipolis (France)

Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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