INVESTIGATION ON THE DYNAMIC BEHAVIOR OF A COMPOUND

A plane model of a compound planetary gear train is proposed to predict the dynamic response of such transmission set which is widely used in automatic vehicle drive transmissions. Translational and rotational motions of the mounted gears are considered. The energetic Lagrange formulation is used to recover the equations of motion and the modal characteristics of the system. Profile error is modelled and taken into account in the equation of motion. Simulations were done with a numerical example for the cases of a healthy system and defected system. An amplitude modulation of the gearmesh signal by the defect signals causing higher vibration levels is observed