Synchronous averaging is difficult to use with epicyclic gear systems because the dominant frequencies are slightly skewed and asymmetrical. This Tech Brief uses Fourier series analysis to add new insight to this phenomenon. The results are illustrated on vibration data recorded from a Cobra AH-1S helicopter gearbox.
Fourier Series Analysis of Epicyclic Gearbox Vibration
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received March 2000; revised June 2001. Associate Editor: G. W. Flowers.
McNames, J. (June 1, 2001). "Fourier Series Analysis of Epicyclic Gearbox Vibration." ASME. J. Vib. Acoust. January 2002; 124(1): 150–153. https://doi.org/10.1115/1.1403735
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