21 July 2014 VLT DSM, the control system of the largest deformable secondary mirror ever manufactured
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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.
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Mauro Manetti, Mauro Manetti, Marco Morandini, Marco Morandini, Paolo Mantegazza, Paolo Mantegazza, Roberto Biasi, Roberto Biasi, Mario Andrighettoni, Mario Andrighettoni, Daniele Gallieni, Daniele Gallieni, } "VLT DSM, the control system of the largest deformable secondary mirror ever manufactured", Proc. SPIE 9148, Adaptive Optics Systems IV, 91484G (21 July 2014); doi: 10.1117/12.2055919; https://doi.org/10.1117/12.2055919
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