Finite element analysis of the GTC Commissioning Instrument structure

Alejandro Farah; Javier Godoy; F. Velazquez; Carlos Espejo; Salvador Cuevas; Vicente Bringas; A. Manzo; L. del Llano; J. L. Sanchez; Armando Chavoya; Nicholas Devaney; Javier Castro; Luis Cavaller

doi:10.1117/12.457979

4 February 2003 Finite element analysis accuracy of the GTC commissioning instrument structure

Alejandro Farah, Javier Godoy, F. Velazquez, Carlos Espejo, Salvador Cuevas, Vicente Bringas, A. Manzo, L. del Llano, J. L. Sanchez, Armando Chavoya, Nicholas Devaney, Javier Castro, Luis Cavaller

Author Affiliations +

Proceedings Volume 4837, Large Ground-based Telescopes; (2003) https://doi.org/10.1117/12.457979
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Under a contract with the GRANTECAN, the Commissioning Instrument (CI) is a project developed by a team of Mexican scientists and engineers from the Instrumentation Department of the Astronomy Institute at the UNAM and the CIDESI Engineering Center. The CI will verify the Gran Telescopio Canarias (GTC) performance during the commissioning phase between First Light and Day One. The design phase is now completed and the project is currently in the manufacturing phase. The CI main goal is to measure the telescope image quality. To obtain a stable high resolution image, the mechanical structures should be as rigid as possible. This paper describes the several steps of the conceptual design and the Finite Element Analysis (FEA) for the CI mechanical structures. A variety of models were proposed. The FEA was useful to evaluate the displacements, shape modes, weight, and thermal expansions of each model. A set of indicators were compared with decision matrixes. The best performance models were subjected to a re-optimization stage. By applying the same decision method, a CI Structure Model was proposed. The FEA results complied with all the instruments specifications. Displacements values and vibration frequencies are reported.

Citation Download Citation

Alejandro Farah, Javier Godoy, F. Velazquez, Carlos Espejo, Salvador Cuevas, Vicente Bringas, A. Manzo, L. del Llano, J. L. Sanchez, Armando Chavoya, Nicholas Devaney, Javier Castro, and Luis Cavaller "Finite element analysis accuracy of the GTC commissioning instrument structure", Proc. SPIE 4837, Large Ground-based Telescopes, (4 February 2003); https://doi.org/10.1117/12.457979

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Finite element methods

Charge-coupled devices

Interfaces

Telescopes

Thermal analysis

Thermal modeling

CCD image sensors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years