Modulation sidebands of planetary gear set

Abstract

In this paper a torsional model of planetary gear set test bench is developed. This bench is composed by two identical planetary gears connected by a common shaft. A tri axial accelerometer is mounted in both rings. The mechanism leading to modulation sidebands is modelled. Time histories are characterized by a periodic fluctuation. Spectra showed sidebands around the mesh frequency and its harmonics. Simulation is achieved to demonstrate amplitude modulation and rich sidebands that agree well with the experimental results.