抄録
Mesh frequency is affected by gear eccentricity. Large waviness in transmission error due to gear eccentricity is the prime cause of modulation. Large waviness causes an amplitude modulation of mesh frequency due to dynamic deflection of gear teeth. The waviness is calculated by the approximate formula of transmission error with gear eccentricity obtained by the authors. By assuming that the mesh wave is purely sinusoidal, the modulated spectrum is calculated theoretically and the obtained spectral components are known as sidebands. Sideband spectrum consists of two components, whose amplitudes are calculated by modulation indices. However, modulation indices can't be decided analytically, because amplitude modulation has strong relation to dynamic deflection of gear teeth. In this paper, amplitude modulation is confirmed by measurement of transmission error of gear eccentricity under load.
