Minimizing motor cogging and vibration for the Thirty Meter Telescope

Thompson, Peter M.; MacMartin, Douglas G.; Thompson, Hugh A.; Sirota, Mark J.

doi:10.1109/aero.2017.7943747

Cited by 1 publication

(2 citation statements)

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“…The problem of low frequencies was also evident in the Subaru Telescope [ 8 ] and the TMT telescope [ 14 ], in the latter with frequencies between 5 Hz and 20 Hz. They focused their study on the altazimuth motor gear as opposed to our study where we measured all vibrations that reached the instrumentation.…”

Section: Discussionmentioning

confidence: 99%

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Study on the Vibration Characteristics of the Telescope T80 in the Javalambre Astrophysical Observatory (JAO) Aimed at Detecting Invalid Images

Martínez

Ferrer

Palacios-Navarro

et al. 2020

Sensors

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The location of large telescopes, generally far from the data processing centers, represents a logistical problem for the supervision of the capture of images. In this work, we carried out a preliminary study of the vibration signature of the T80 telescope at the Javalambre Astrophysical Observatory (JAO). The study analyzed the process of calculating the displacement that occurs because of the vibration in each of the frequencies in the range of interest. We analyzed the problems associated with very low frequencies by means of simulation, finding the most critical vibrations below 20 Hz, since they are the ones that generate greater displacements. The work also relates previous studies based on simulation with the real measurements of the vibration of the telescope taken remotely when it is subjected to different positioning movements (right ascension and/or declination) or when it performs movement actions such as those related to filter trays or mirror cover. The obtained results allow us to design a remote alarm system to detect invalid images (taken with excess vibration).

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Section: Discussionmentioning

confidence: 99%

“…At the Thirty Meter Telescope (TMT), researchers Thompson et al [ 14 ] focused on the study of the azimuth motor gear on the A – Z axis. To do so, they estimated the forces produced in the gear of the direct motor, taking into account the misalignment in the installation and the spatial compensations.…”

Section: Introductionmentioning

confidence: 99%