27 July 2016 Modal vibration testing of the DVA-1 radio telescope
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter W. G. Byrnes, Peter W. G. Byrnes, Gordon Lacy, Gordon Lacy, "Modal vibration testing of the DVA-1 radio telescope", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99063P (27 July 2016); doi: 10.1117/12.2231486; https://doi.org/10.1117/12.2231486


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