Thermal control strategy of GMT elevation drive

Aleksej Kiselev; Sebastian Lüft; Konstantinos Giannouloudis; Joachim Hammes

doi:10.1117/12.2630047

26 August 2022 Thermal control strategy of GMT elevation drive

Aleksej Kiselev, Sebastian Lüft, Konstantinos Giannouloudis, Joachim Hammes

Proceedings Volume 12182, Ground-based and Airborne Telescopes IX; 1218241 (2022) https://doi.org/10.1117/12.2630047
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

In this paper, the thermal design of the GMT elevation drive’s active segments (forcers) is presented. The design goal is to keep the forcer housing temperature during observation within a band of −2 K to +1 K with respect to the ambient temperature. The key drivers of the forcer thermal design are described and verified for a constant load by computational fluid dynamics (CFD) simulation. Additionally, a temperature feedback control loop is introduced to manage the high dynamic load variations occurring during observation. The dynamic simulation results of the temperature control are provided by the lumped parameters thermal modelling approach and confirm the forcer to stay within the defined temperature range.

Conference Presentation

Citation Download Citation

Aleksej Kiselev, Sebastian Lüft, Konstantinos Giannouloudis, and Joachim Hammes "Thermal control strategy of GMT elevation drive", Proc. SPIE 12182, Ground-based and Airborne Telescopes IX, 1218241 (26 August 2022); https://doi.org/10.1117/12.2630047

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