Abstract
This paper describes the effect of the stand stiffness on active vibration control for an overhung rotor system. The overhung rotor is supported by a flexible bearing pedestal installed in four pairs of U-shaped electromagnets. The electromagnets give a flexible bearing the control force to effectively reduce the unbalance vibration of the overhung rotor. When the vibration control system is attached in the rotating machinery for industrial use, the stand supporting the control system to the foundation may be assumed to, not rigid body, but elastic one. In this paper, we consider the effect of stiffness and damping of the elastic stand on the vibration control performance near 2nd critical speed for an overhung rotor system by both of the numerical simulation and experiment.
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