Elasticity Control of Curved Piezoelectric Polymer Films
Elasticity Control of Curved Piezoelectric Polymer Films
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DOI：
10.1080/00150190590966720
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发表时间：
2005-07
期刊：
影响因子：
0.8
通讯作者：
E. Fukada;M. Date;H. Kodama;Y. Oikawa
中科院分区：
文献类型：
--
作者：
E. Fukada;M. Date;H. Kodama;Y. Oikawa
Abstract The control of sound transmission through a curved piezoelectric PVDF film was achieved using a negative capacitance circuit as a feedback system. A laser Doppler vibrometer was used to measure the vibration amplitude of the film. The vibration amplitude decreased to near zero and then increased with the reversed phase with increasing feedback voltage. The transmission of sound through the film was significantly suppressed when the vibration amplitude of the film reached near zero. The effect of the thickness and the radius of curvature of the film were tested. The efficiency of feedback depended on the electromechanical coupling factor of the film and the difference of the loss factor between the capacitances of the film and the circuit.
