A single mass dynamic vibration absorber producing linear damping, Coriolis damping and gyro-damping

Abstract

To reduce the vibration of a planar pendulum, this paper proposes a single mass dynamic vibration absorber (DVA), which can simultaneously produce linear damping, Coriolis damping and gyro-damping. The proposed DVA contains a rotor inside a gimbal. The rotor has a constant angular speed and its axis is direct to the fulcrum. At the same time, the gimbal can move in the normal and tangential directions of the pendulum orbit. The translations in tangential and normal directions and the gimbal rotation result in the linear damping, Coriolis damping and gyro-damping, respectively. Because each type of damping has advantages and disadvantages, the combined DVA has the improved performance. A numerical demonstration is carried out to show the effectiveness of the proposed DVA.