The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Torben Anderssen. Profile picture.

Torben Andersen

Professor emeritus (Leave of Absence)

Torben Anderssen. Profile picture.

Integrated modeling of the Euro50

Author

  • Torben Andersen
  • M.T. Browne
  • Anita Enmark
  • Dan Moraru
  • Mette Owner-Petersen
  • Holger Riewaldt

Editor

  • Arne Ardeberg
  • Torben Andersen

Summary, in English

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

Department/s

  • Lund Observatory - Has been reorganised

Publishing year

2003

Language

English

Pages

366-378

Publication/Series

Proceedings of the SPIE - The International Society for Optical Engineering

Volume

5382

Issue

1

Document type

Conference paper

Publisher

SPIE

Topic

  • Astronomy, Astrophysics and Cosmology

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

Conference name

Second Bäckaskog Workshop on Extremely Large Telescopes, 2003

Conference date

2003-09-09 - 2003-09-11

Conference place

Bäckaskog Castle, Sweden

Status

Published

ISBN/ISSN/Other

  • ISSN: 1996-756X
  • ISSN: 0277-786X