By the piezoelectric actuator of the cylindrical husk vibrating control manner and the device null for

摘要

PURPOSE:To effectively control the vibration of a cylindrical shell by the forced vibration of a piezoelectric actuator consisting of a piezoelectric film which forms the cylindrical shell. CONSTITUTION:The displacement of a cylindrical shell 20 consisting of a piezoelectric film that is caused by the vibration is detected. Based on this displacement, a piezoelectric actuator 22 provided on the shell 20 is actively vibrated. So that the vibration of the shell 20 is controlled.