First on-sky SCAO validation of full LQG control with vibration mitigation on the CANARY pathfinder - Institut d'Optique Graduate School Access content directly
Journal Articles Optics Express Year : 2014

First on-sky SCAO validation of full LQG control with vibration mitigation on the CANARY pathfinder

Caroline Kulcsár
Serge Meimon
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  • PersonId : 831848
Nigel Dipper
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Gordon Talbot
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Eddy Younger
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Stephen Todd
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  • PersonId : 899288
David Atkinson
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Colin Dickson
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Andy Longmore
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Abstract

Adaptive optics provides real time correction of wavefront disturbances on ground based telescopes. Optimizing control and performance is a key issue for ever more demanding instruments on ever larger telescopes affected not only by atmospheric turbulence, but also by vibrations, windshake and tracking errors. Linear Quadratic Gaussian control achieves optimal correction when provided with a temporalmodel of the disturbance. We present in this paper the first on-sky results of a Kalman filter based LQG control with vibration mitigation on the CANARY instrument at the Nasmyth platform of the 4.2-m William Herschel Telescope. The results demonstrate a clear improvement of performance for full LQG compared with standard integrator control, and assess the additional improvement brought by vibration filtering with a tip-tilt model identified from on-sky data, thus validating the strategy retained on the instrument SPHERE at the VLT.
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hal-01739389 , version 1 (22-12-2023)

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Gaetano Sivo, Caroline Kulcsár, Jean-Marc Conan, Henri-François Raynaud, Eric Gendron, et al.. First on-sky SCAO validation of full LQG control with vibration mitigation on the CANARY pathfinder. Optics Express, 2014, 22 (19), pp.23565-23591. ⟨10.1364/OE.22.023565⟩. ⟨hal-01739389⟩
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