Vibration control apparatus

摘要

A vibration control apparatus comprises a vibration member having a surface with a resonance point. A piezoelectric element is adhered to the surface of the vibration member. A drive apparatus is connected to the piezoelectric element via an impedance element for exciting the piezoelectric element with an A.C. signal. A feedback circuit is connected between the piezoelectric element and the drive apparatus. The feedback circuit picks out the components of a voltage on the piezoelectric element caused by a strain of the piezoelectric element and feeds this voltage back to control the drive apparatus. The inventive vibration control apparatus may be incorporated in a gyro to simplify the construction of the gyro.