Vibration Sideband Modulations and Harmonics Separation of a Planetary Helicopter Gearbox with Two Different Configurations

<div>Power spectrum of (a) order-tracked signal, (b) residual signal obtained by setting the shaft’ related harmonics to the mean of adjacent (noise) lines, (c) residual signal obtained by subtracting the synchronous averages after resampling, and (d) DRS residual (removing discrete components using DRS).</div>

Advances in Acoustics and Vibration

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Figure 13

Figure 13: Vibration Sideband Modulations and Harmonics Separation of a Planetary Helicopter Gearbox with Two Different Configurations 