Integrated modeling of the Euro50
Andersen, Torben; Browne, M.T.; Enmark, Anita; Moraru, Dan, et al. (2003). Integrated modeling of the Euro50. Ardeberg, Arne; Andersen, Torben (Eds.). Proceedings of the SPIE - The International Society for Optical Engineering, 5382, (1), 366 - 378. Second Bäckaskog Workshop on Extremely Large Telescopes, 2003. Bäckaskog Castle, Sweden: SPIE
Conference Proceeding/Paper
|
Published
|
English
Authors:
Andersen, Torben
;
Browne, M.T.
;
Enmark, Anita
;
Moraru, Dan
, et al.
Editors:
Ardeberg, Arne
;
Andersen, Torben
Department:
Lund Observatory - Has been reorganised
Abstract:
The Euro50 is a proposed 50 m optical and infrared telescope. It will have thousands of control loops to keep the optics aligned under influence of wind, gravity and thermal loads. Cross-disciplinary integrated modeling is used to study the overall performance of the Euro50. A sub-model of the mechanical structure originates from finite element modeling. The optical performance is determined using ray tracing, both non-linear and linearized. The primary mirror segment alignment control system is modeled with the 618 segments taken as rigid bodies. Adaptive optics is included using a layered model of the atmosphere and sub-models of the wavefront sensor, reconstructor and controller. The deformable mirror is, so far, described by a simple influence function and a second order dynamical transfer function but more detailed work is in progress. The model has been implemented using Matlab/Simulink on individual computers but it will shortly be implemented on a Beowulf cluster within a trusted network. Communication routines between Matlab on the cluster processors have been written and are being benchmarked. Representative results from the simulations are shown
Keywords:
Euro50 infrared telescope ;
wind load effect ;
thermal load effect ;
control loops ;
gravity effect ;
mechanical structure ;
finite element modeling ;
optical performance ;
primary mirror segment alignment control system ;
ray tracing ;
adaptive optics ;
atmospheric model ;
wavefront sensor ;
MATLAB ;
second order dynamical transfer function ;
deformable mirror ;
Beowulf cluster ;
SIMULINK ;
cluster processor ;
Eur050 optical telescope ;
integrated modeling
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