Patent ID: 6193032
Filing Date: 2001-02-27
Classification: B64C,F16F

Abstract:
A vibration control device, comprising:a mass;spring means including a spring and a piezoceramic element coupled physically to said mass;a variable capacitance coupled in shunt with said piezoceramic element for altering stiffness of said piezoceramic element; anda signal processor being responsive to an electrical signal induced in said piezoceramic element by a disturbance vibration to produce a control voltage indicative of the frequency of said disturbance vibration; anda selector circuit including a voltage divider for dividing said control voltage into at least one of a plurality of switching signals for operating at least one of a like plurality of switches for automatically configuring said variable capacitance to tune the frequency of said vibration control device to said frequency of said disturbance vibration by changing said stiffness of said piezoceramic element.