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Proceedings Paper

Modal vibration testing of the DVA-1 radio telescope
Author(s): Peter W. G. Byrnes; Gordon Lacy
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Paper Abstract

The Dish Verification Antenna 1 (DVA-1) is a 15m aperture offset Gregorian radio telescope featuring a rim-supported single piece molded composite primary reflector on an altitude-azimuth pedestal mount. Vibration measurements of the DVA-1 telescope were conducted over three days in October 2014 by NSI Herzberg engineers. The purpose of these tests was to measure the first several natural frequencies of the DVA-1 telescope. This paper describes the experimental approach, in particular the step-release method, and summarizes some interesting results, including unexpectedly high damping of the first mode over a narrow range of zenith angles.

Paper Details

Date Published: 27 July 2016
PDF: 20 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99063P (27 July 2016); doi: 10.1117/12.2231486
Show Author Affiliations
Peter W. G. Byrnes, National Research Council of Canada (Canada)
Gordon Lacy, NRC - Dominion Radio Astrophysical Observatory (Canada)


Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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