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Proceedings Paper

Local effects on E-ELT global performance: two examples for requirement verification
Author(s): B. Sedghi; M. Muller; F. Koch; L. Pettazzi
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Paper Abstract

In this paper two case studies, highlighting the role of the integrated modeling in the performance prediction and requirement verification of the E-ELT are presented. First example discusses the effect of the local wind load on the secondary mirror and the global wavefront error. Analysis and simulations showed that such local effect is one of the main contributors to the telescope error budget. A detailed modeling and simulation approach with the possibility to modify some important mechanical and control parameters led to a better understanding of the problem and searching for appropriate mitigation strategies. In the second example the effect of friction devices of the lateral support of the azimuth structure is presented. Such devices were originally proposed by the telescope structure contractor to reduce the induced stresses and force due to the temperature variations. A detailed modeling of the friction devices and its inclusion into the telescope dynamical model revealed that some performance and interface requirements are violated.

Paper Details

Date Published: 10 November 2011
PDF: 13 pages
Proc. SPIE 8336, Integrated Modeling of Complex Optomechanical Systems, 83360O (10 November 2011); doi: 10.1117/12.915504
Show Author Affiliations
B. Sedghi, European Southern Observatory (Germany)
M. Muller, European Southern Observatory (Germany)
F. Koch, European Southern Observatory (Germany)
L. Pettazzi, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 8336:
Integrated Modeling of Complex Optomechanical Systems
Torben Andersen; Anita Enmark, Editor(s)

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