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Integrated modeling of the Euro50

Andersen, Torben LU ; Browne, M.T.; Enmark, Anita LU ; Moraru, Dan LU ; Owner-Petersen, Mette LU and Riewaldt, Holger LU (2003) Second Bäckaskog Workshop on Extremely Large Telescopes, 2003 In Proceedings of the SPIE - The International Society for Optical Engineering 5382(1). p.366-378
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... (More)
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 (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
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
in
Proceedings of the SPIE - The International Society for Optical Engineering
editor
Ardeberg, Arne; Andersen, Torben; and
volume
5382
issue
1
pages
366 - 378
publisher
SPIE
conference name
Second Bäckaskog Workshop on Extremely Large Telescopes, 2003
external identifiers
  • wos:000223325000042
  • scopus:5444222676
ISSN
1996-756X
0277-786X
DOI
10.1117/12.566232
language
English
LU publication?
yes
id
1cd9a390-6fe2-4ce6-b22f-9309804ee578 (old id 615034)
date added to LUP
2007-11-27 09:49:37
date last changed
2018-01-07 05:41:02
@inproceedings{1cd9a390-6fe2-4ce6-b22f-9309804ee578,
  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},
  author       = {Andersen, Torben and Browne, M.T. and Enmark, Anita and Moraru, Dan and Owner-Petersen, Mette and Riewaldt, Holger},
  booktitle    = {Proceedings of the SPIE - The International Society for Optical Engineering},
  editor       = {Ardeberg, Arne and Andersen, Torben},
  issn         = {1996-756X},
  keyword      = {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},
  language     = {eng},
  number       = {1},
  pages        = {366--378},
  publisher    = {SPIE},
  title        = {Integrated modeling of the Euro50},
  url          = {http://dx.doi.org/10.1117/12.566232},
  volume       = {5382},
  year         = {2003},
}