title: First on-sky SCAO validation of full LQG control with vibration mitigation on the CANARY pathfinder.
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 temporal model 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.
authors.forename: Gaetano
authors.initials: G
authors.lastname: Sivo
authors.forename: Caroline
authors.initials: C
authors.lastname: Kulcsár
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Conan
authors.forename: Henri-François
authors.initials: HF
authors.lastname: Raynaud
authors.forename: Eric
authors.initials: E
authors.lastname: Gendron
authors.forename: Alastair
authors.initials: A
authors.lastname: Basden
authors.forename: Fabrice
authors.initials: F
authors.lastname: Vidal
authors.forename: Tim
authors.initials: T
authors.lastname: Morris
authors.forename: Serge
authors.initials: S
authors.lastname: Meimon
authors.forename: Cyril
authors.initials: C
authors.lastname: Petit
authors.forename: Damien
authors.initials: D
authors.lastname: Gratadour
authors.forename: Olivier
authors.initials: O
authors.lastname: Martin
authors.forename: Zoltan
authors.initials: Z
authors.lastname: Hubert
authors.forename: Arnaud
authors.initials: A
authors.lastname: Sevin
authors.forename: Denis
authors.initials: D
authors.lastname: Perret
authors.forename: Fanny
authors.initials: F
authors.lastname: Chemla
authors.forename: Gérard
authors.initials: G
authors.lastname: Rousset
authors.forename: Nigel
authors.initials: N
authors.lastname: Dipper
authors.forename: Gordon
authors.initials: G
authors.lastname: Talbot
authors.forename: Eddy
authors.initials: E
authors.lastname: Younger
authors.forename: Richard
authors.initials: R
authors.lastname: Myers
authors.forename: David
authors.initials: D
authors.lastname: Henry
authors.forename: Stephen
authors.initials: S
authors.lastname: Todd
authors.forename: David
authors.initials: D
authors.lastname: Atkinson
authors.forename: Colin
authors.initials: C
authors.lastname: Dickson
authors.forename: Andy
authors.initials: A
authors.lastname: Longmore
mesh_terms: D001256:Astronomy / Q000295:instrumentation*; D003198:Computer Simulation; D004867:Equipment Design; D007909:Lenses; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D061351:Telescopes