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Proceedings Paper

Structure analysis of the primary mirror support for the TIM using computer-aided finite element method
Author(s): Alejandro Farah Simon; Maria H. Pedrayes; Elfego Ruiz Schneider; Gerardo Sierra; Fernando Quiros-Pacheco; Javier Godoy; Erika Sohn
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Paper Abstract

The Mexican Infrared Telescope is one of the most important projects in the Institute for Astronomy of the National University of Mexico. As part of the design we pretend to simulate different components of the telescope by the Finite Element Method (FEM). One of the most important parts of the structure is the primary mirror support. This structure is under stress, causing deformations in the primary mirror; these deformations shouldn't be over 40 nanometers, which is the maximum permissible tolerance. One of the most interesting subjects to develop in this project is to make the segmented primary mirror to work like if it were a monolithic one. Each segment has six degrees of freedom, whose control needs actuators and sensors with stiff mechanical structures. Our purpose is to achieve these levels of design using FEM aided by computer and we pretend to study several models of the structure array using the Conceptual Design Method, in an effort to optimize the design.

Paper Details

Date Published: 2 August 2000
PDF: 8 pages
Proc. SPIE 4004, Telescope Structures, Enclosures, Controls, Assembly/Integration/Validation, and Commissioning, (2 August 2000); doi: 10.1117/12.393948
Show Author Affiliations
Alejandro Farah Simon, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Maria H. Pedrayes, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Elfego Ruiz Schneider, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Gerardo Sierra, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (United States)
Fernando Quiros-Pacheco, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Javier Godoy, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)
Erika Sohn, Instituto de Astronomia/Univ. Nacional Autonoma de Mexico (Mexico)


Published in SPIE Proceedings Vol. 4004:
Telescope Structures, Enclosures, Controls, Assembly/Integration/Validation, and Commissioning
Thomas A. Sebring; Torben Andersen, Editor(s)

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