压电超材料主动控制分流电路设计  

Design of Active Control Shunt Circuit for Piezoelectric Metamaterials

作　　者：李泽 王勋宝 刘钊 倪明 付宝伟 LI Ze;WANG Xunbao;LIU Zhao;NI Ming;FU Baowei(Shanghai Electro-Mechanical Engineering Institute,Shanghai 201109,China)

机构地区：[1]上海机电工程研究所,上海201109

出　　处：《压电与声光》2022年第1期130-133,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金面上资助项目(61573289)。

摘　　要：为进一步优化压电声学超材料分流电路设计,提出了一种基于零极点配置的主动控制电路,总结出零极点配置的一般规律,直接通过调节零点和极点设计相关传递函数,并利用微控制器加以实现。由于数字控制器能够利用计算机进行远程控制,因此可以更灵活地调节超材料带隙。该方法降低了模拟电路的复杂度,摆脱了模拟电路需要手动调整参数的限制,为超材料的智能控制提供了新的思路,更便于实际应用。实验结果表明,压电超材料在低频模态范围内均有超过14 dB的衰减,由此证明了结构所用主动控制电路的有效性。In order to further optimize the shunt circuit design of piezoelectric metamaterials,an active control circuit based on zero and pole assignment was proposed and the general rules of the zero and pole assignment were summarized.The related transfer functions were designed directly by adjusting the zeroes and poles,and realized by using the microcontroller.Because the digital controller can be remotely controlled by a computer,the band gap of metamaterials can be adjusted flexibly.This method reduces the complexity of the analog circuit,gets rid of the limitation that the parameters of the analog circuit needs to be manually adjusted,provides a new idea for the intelligent control of metamaterials,and is more convenient for practical applications.The experimental results show that the attenuation of piezoelectric metamaterials exceeds 14 dB in the low frequency mode range,which proves the effectiveness of the active control circuit used in the structure.

关 键 词：声学超材料 压电分流 零极点配置 带隙 数字控制器 

分 类 号：TN384[电子电信—物理电子学] TM22[一般工业技术—材料科学与工程]