Nonharmonic Control of the Blade-Vortex Interaction Noise of Electrically Controlled Rotor

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/ijae/volume-2022/5353681/figures/5353681.fig.004a.svgz" name="5353681.fig.004a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Diagram of azimuth</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/ijae/volume-2022/5353681/figures/5353681.fig.004b.svgz" name="5353681.fig.004b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Diagram of waveform</td></tr></table>

<div>Schematic diagram of the azimuth and waveform of the cosine input in the third quadrant of the flap.</div>

International Journal of Aerospace Engineering

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Figure 4

Figure 4: Nonharmonic Control of the Blade-Vortex Interaction Noise of Electrically Controlled Rotor 