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Volume 4: 9th International Power Transmission and Gearing Conference, Parts A and B
This paper explores the vibration spectra for planetary gear systems by studying a kinematic model of vibration and comparing the model with measurements of two helicopter transmissions made in flight. The model and flight data include systems with both uniformly and nonuniformly spaced planet gears. This model predicts vibration to occur only at frequencies that are integer multiples of the planet spacing repetition frequency and clustered around gear mesh harmonics. Vibration measurementsdoi:10.1115/detc2003/ptg-48082 fatcat:6m3b2qm57rfhjdiwvbzxelsuaq