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Proceedings Paper

Mechanical development of an alternative set of actuators for the LMT/GTM primary surface outer rings: also useful to replace the interim actuators
Author(s): César Arteaga-Magaña; José Luis Hernández-Rebollar; Josefina Lazaro-Hernandez; Gabriela Montalvo; Ernesto Hernández; Eduardo Ramos
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Paper Abstract

The Large Millimeter Telescope/Gran Telescopio Milimétrico (LMT/GTM) is the world’s largest, single dish radio telescope for observations in millimeter wavelengths. 180 segments arranged in 5 rings form the reflector’s active surface. Each segment supported by four linear actuators. The current interim actuators fill the 3 inner rings only, while allowing the completion of the rest of the surface and the installation of the final actuators. A new modification had, to be made in order to reduce the actuators size for the outer rings and also to improve their performance. The project needs to install at least another 336 actuators for the 2 outer rings of segments. However, the room for those actuators has reduced room underneath the outer rings.

Initially, the present development was intended as alternative for the antenna’s outer rings, but as time went by, we discovered the advantage of installing them as replacements of the current interim actuators, since a system of final actuators for the antenna’s outer rings is already under test and construction. Hence, this new mechanical design of compact geometry is not only capable of fitting in the reduced space, but also of replacing the interim actuators in the inner rings.

Paper Details

Date Published: 22 July 2016
PDF: 8 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99126C (22 July 2016); doi: 10.1117/12.2230858
Show Author Affiliations
César Arteaga-Magaña, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
José Luis Hernández-Rebollar, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Josefina Lazaro-Hernandez, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Gabriela Montalvo, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Ernesto Hernández, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
Eduardo Ramos, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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