Patent ID: 6920794

Claim:
A vibration control system for a rotary machine having a rotor, comprising: a sensor disposed within the rotary machine for sensing vibration of the rotor; a vibration damping device disposed within the rotary machine for imparting a reaction force to the rotor; and a controller arranged in operable communication with said sensor and said vibration damping device, said controller adapted to receive a sensor signal from said sensor and to send a control signal to said vibration damping device for damping the vibration of the rotor, wherein the control signal to said vibration damping device is adapted to adjust an excitation of said vibration damping device based upon the following relationship H ( s )= X 1 ( s )/ F ( s ); wherein H(s) is a system transfer function, X 1 (s) is a calculated system output response and F(s) is a vibration frequency input based upon said sensor signal.