Abstract
Vibration control experiments of a simply supported beam using piezoelectric film (PVDF) sensor / actuator are carried out to verify that the triangular-shaped film pair is effective for multi modes vibration control in comparison with the rectangular-shaped film pair. In the experiment, analog circuits are used to implement DVFB (Direct velocity feedback) control law. Frequency responses of displacemet of a beam subjected to a concentrated harmonic force are measured with sensor outputs and feedback voltages, and those show good agreement with the theoretical results. As predicted theoretically, it is shown in the present experiments that all of the first three vibrational modes are efficiently controlled by the triangular-shaped film sensor / actuator, wheres the rectangular-shaped film sensor / actuator has no control effect against the anti-symmetrical vibrational modes, i. e., the second mode.
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