Patent ID: 6870303
Filing Date: 2005-03-22
Classification: F16F

Abstract:
1. A device for controlling the damping of vibration and/or noise from the vibrating structure or system using a series negative capacitance shunt circuit and a parallel negative capacitance shunt circuit, which are connected a resistor and a negative capacitor in series and in parallel, respectively, comprising: a structure and a system, which generate vibration and noise due to mechanical energy, such as force, pressure, and stress; piezoelectric materials attached to the structure, which generate electrical energy in response to stress due to the vibration and/or noise and are transformed when receiving a predetermined electric energy; and shunt circuit units, which are connected to the piezoelectric materials to feed back the electrical energy generated by the piezoelectric materials to the piezoelectric materials via the shunt impedance in order to induce the transformation of the piezoelectric materials.