Non-Resonant Piezoelectric Actuator With Large Displacement At Low Frequencies

摘要：

　　A novel piezoelectric actuator is proposed to enhance its displacement in broad band at low frequencies.Its structure consists of a tunable stiffness part and a driven part.The tunable stiffness part is the piezoelectric stacks shunted with negative capacitance and its effective stiffness could be softening widely under the proper capacitance ratios at low frequencies.The principle of tunable stiffness system is analyzed and the proposed actuator is simulated by multi physics coupled finite element method When negative capacitance is selected properly, the displacement of the actuator can be increased up about 10 to 100 times in much broad band even at non-resonant low frequencies.The non resonant actuator can be used to generate large displacement at low frequencies.

关键词： piezoelectric actuator non-resonance negative capacitance

作者: Zhang Wenqun Wu Xinyue Cao Wen

作者单位: Department of Mechanical Engineering,Naval University of Engineering Jiefang Road 717,Wuhan Hubei,Ch Department of Engineering Wuhan Environmental Protection Science Research Institute Jiefang Road 717

会议类型: 国际会议

会议名称: 2013 IEEE 11th International Conference on Electronic Measurement & Instruments(第十一届IEEE国际电子测量与仪器学术会议)

会议地点: 哈尔滨

会议语种:英文

页码: 947-951

在线出版日期: 2013-08-16（万方平台首次上网日期，不代表论文的发表时间）