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Proceedings Paper

VLT DSM, the control system of the largest deformable secondary mirror ever manufactured
Author(s): Mauro Manetti; Marco Morandini; Paolo Mantegazza; Roberto Biasi; Mario Andrighettoni; Daniele Gallieni
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Paper Abstract

A proven technology for the shape control of large secondary deformable mirrors employs a magnetically levitated contactless solution and relies on voice-coil actuators co-located to capacitive position sensors. The present work focuses on the description of the latest upgrade of this technology, as applied to the Very Large Telescope Deformable Secondary Mirror, the largest continuous facesheet adaptive mirror ever manufactured. The controller is based on a completely decentralized high frequency feedback coupled to a lower frequency improved feedforward. The system enhancements and performances are verified through electromechanical tests.

Paper Details

Date Published: 21 July 2014
PDF: 9 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91484G (21 July 2014); doi: 10.1117/12.2055919
Show Author Affiliations
Mauro Manetti, Microgate S.r.l. (Italy)
Marco Morandini, Politecnico di Milano (Italy)
Paolo Mantegazza, Politecnico di Milano (Italy)
Roberto Biasi, Microgate S.r.l. (Italy)
Mario Andrighettoni, Microgate S.r.l. (Italy)
Daniele Gallieni, A.D.S. International S.r.l. (Italy)

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

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