Patent ID: 6254069
Filing Date: 2001-07-03
Classification: F16F

Abstract:
An active vibration damping system for damping vibration of a subject member, comprising:a fluid-filled vibration damping device including an elastic body partially defining a primary fluid chamber filled with a non-compressible fluid, said elastic body being elastically deformed so as to cause a change in a pressure of said fluid in said primary fluid chamber, upon application of a vibrational load from said subject member, an oscillating plate partially defining an auxiliary fluid chamber filled with said non-compressible fluid, a drive means for generating a driving force for oscillating said oscillating plate so as to cause a change in a pressure of said fluid in said auxiliary fluid chamber, and a first orifice passage for fluid communication between said primary and auxiliary fluid chambers; anda control device applying an electric drive pulse signal to said drive means for controlling oscillation of said oscillating plate, said control device including a pulse signal generator for generating a control pulse signal whose frequency corresponds to that of said vibration of said subject member, a phase modulator for modulating a phase of said control pulse signal depending upon a condition of said vibration of said subject member, and a driving force regulator for adjusting a waveform of said control pulse signal to obtain said electric drive pulse signal so that said driving force generated by said drive means corresponds to an amplitude of said vibration of said subject member,said drive means generating said driving force such that said driving force corresponds to an amplitude of said electric drive pulse signal applied to the drive means.