Modal vibration testing of the DVA-1 radio telescope

Peter W. G. Byrnes; Gordon Lacy

doi:10.1117/12.2231486

27 July 2016 Modal vibration testing of the DVA-1 radio telescope

Peter W. G. Byrnes, Gordon Lacy

Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 99063P (2016) https://doi.org/10.1117/12.2231486
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

Citation Download Citation

Peter W. G. Byrnes and Gordon Lacy "Modal vibration testing of the DVA-1 radio telescope", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99063P (27 July 2016); https://doi.org/10.1117/12.2231486

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