719 圧電フィルムセンサ/アクチュエータによる不規則励振を受ける片持ばりの波動吸収制御

抄録

A wave absorbing control method using piezoelectric film sensor/actuator, namely quasi-waveabsorbing control which is based on relative displacement control, of a flexible thin-walled cantilever beam subjected to random displacement excitation is investigated. Vibration control experiment is performed with the triangular shaped sensor and the rectangular shaped actuator bonded on both surfaces of the beam, and velocity feedback control law which is expected to be most effective in the theoretical analysis is applied. Fixed boundary of the cantilever is subjected to limited bandwidth random noise excitation, and the relative displacement of the beam is measured. It is verified that good vibration control effects are obtained for the bandwidth containing three lowest vibration modes.