Дослідження характеристик акустичного випромінювання малих безпілотних літальних апаратів

Abstract

In In this work we investigated the acoustic emission characteristics of two small UAVs: a quadrocopter DJI Phantom 2 and a monoplane Skywalker Falcon 1340 mm EPO Flying Wing. Time realizations, autocorrelation functions, amplitude spectra, spectrograms and pseudo-phase portraits of acoustic signals are obtained. The signals have a periodic character, the spectra have expressed harmonic components with frequencies that are multiples of the rotational frequency of the screw.