Title :
Compensating non-linear effects in a MIMO system with unobservable and uncontrollable modes
Author :
Fedrigo, Enrico ; Muradore, Riccardo
Author_Institution :
Eur. Organ. for Astron. Res. in the Southern Hemisphere, Garching
Abstract :
In this paper we propose an architecture to deal with non-linear effects like saturation that can severly limit the performance of an adaptive optics (AO) system while preserving good performance in both point-spread function (PSF) output and piston management. An AO system uses a wave-front sensor as input device and a deformable mirror (DM) as output device. Since both the input and output devices have several degrees of freedom, this is a MIMO system. We consider the case of MACAO (for multi-application curvature adaptive optics) which has a wave-front sensor with 60 channels and a DM with 60 actuators.
Keywords :
MIMO systems; nonlinear control systems; optical control; MIMO system; adaptive optics system; nonlinear effects; piston management; point-spread function output; Adaptive optics; Apertures; Atmospheric measurements; Delta modulation; Distortion measurement; MIMO; Nonlinear distortion; Optical distortion; Optical interferometry; Telescopes;
Conference_Titel :
Decision and Control, 2007 46th IEEE Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-1497-0
Electronic_ISBN :
0191-2216
DOI :
10.1109/CDC.2007.4434687
