United States Department of Transportation
i
Rotorcraft Strike Avoidance System Using Airborne Avian Radar
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2022-06-01
[PDF-5.21 MB]
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Edition:Final Report October 2017 - May 2019
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Abstract:A research and development (R&D) proof-of-concept airborne avian radar to detect birds and other targets ahead of a rotorcraft was designed, constructed, and ground tested. The radar was designed to provide collision warning out to 1500 meters day or night in haze, fog, or rain. Its principal of operation was to use a single forward-looking antenna to measure target intensity and Doppler velocity as the rotorcraft approached the target. A constant target intensity and Doppler velocity during the approach indicated that the target was on a collision course with the rotorcraft and flight deviation was recommended. A coherent segmented binary pseudo noise PN-coded radar was designed to simultaneously display and track multiple targets at different ranges or Doppler velocities. Using available components, the radar was designed as a software defined radar composed of a RF receive/transmit unit, an analog to digital sampling board, a field programmable gate array (FPGA) processing board, and a personal computer (PC) running Matlab for processing and display. The radar was extensively ground tested on road traffic and drone flights, which verified its ability to detect and simultaneously measure the range and Doppler velocity of multiple targets.
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