TMT wind model validation with measurements on Keck and Gemini

T. M. Erm; G. Z. Angeli

doi:10.1117/12.670002

26 June 2006 TMT wind model validation with measurements on Keck and Gemini

T. M. Erm, G. Z. Angeli

Proceedings Volume 6271, Modeling, Systems Engineering, and Project Management for Astronomy II; 62710N (2006) https://doi.org/10.1117/12.670002
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Wind disturbance is an important parameter in the assessment of telescope performance, especially for extremely large telescopes like TMT. In the process of estimating the response of the TMT telescope structure to wind buffeting, we were carrying out measurements on the Keck and Gemini observatories in order to better understand the possible variations in the wind response of these different telescopes. The measurements were used to validate the TMT wind model as well as explaining the mechanism through which the wind disturbances affect the pointing of the elevation axis. We were estimating the wind torque acting on the elevation axis from the measured Disturbance Transfer Function and Position Error of the mount control. Furthermore, the quality of the correlation between wind speed and torque disturbance were investigated to evaluate the feasibility of mitigating the wind disturbance by introducing feed-forward or adaptive control schemes in the mount control.

Citation Download Citation

T. M. Erm and G. Z. Angeli "TMT wind model validation with measurements on Keck and Gemini", Proc. SPIE 6271, Modeling, Systems Engineering, and Project Management for Astronomy II, 62710N (26 June 2006); https://doi.org/10.1117/12.670002

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