4 August 2014 TMT telescope structure thermal model
Author Affiliations +
Abstract
The thermal behavior of the Thirty Meter Telescope (TMT) Telescope Structure (STR) and the STR mounted subsystems depends on the heat load of the System, the thermal properties of component materials and the environment as well as their interactions through convection, conduction and radiation. In this paper the thermal environment is described and the latest three-dimensional Computational Solid Dynamics (CSD) model is presented. The model tracks the diurnal temperature variation of the STR and the corresponding deformations. The resulting displacements are fed into the TMT Merit Function Routine (MFR), which converts them into translations and rotations of the optical surfaces. They, in turn, are multiplied by the TMT optical sensitivity matrix that delivers the corresponding pointing error. Thus the thermal performance of the structure can be assessed for requirement compliance, thermal drift correction strategies and look-up tables can be developed and design guidance can be provided. Results for a representative diurnal cycle based on measured temperature data from the TMT site on Mauna Kea and CFD simulations are presented and conclusions are drawn.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Konstantinos Vogiatzis, Konstantinos Vogiatzis, Amir Sadjadpour, Amir Sadjadpour, Scott Roberts, Scott Roberts, } "TMT telescope structure thermal model", Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 915011 (4 August 2014); doi: 10.1117/12.2056582; https://doi.org/10.1117/12.2056582
PROCEEDINGS
12 PAGES


SHARE
RELATED CONTENT

LSST telescope modeling overview
Proceedings of SPIE (August 19 2016)
Advances in aerothermal modeling for TMT
Proceedings of SPIE (July 07 2008)
Monte Carlo simulation framework for TMT
Proceedings of SPIE (July 09 2008)
Aero-thermal modeling framework for TMT
Proceedings of SPIE (November 10 2011)

Back to Top