Development of piezoelectric fans for flapping wing application
Development of piezoelectric fans for flapping wing application
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DOI：
10.1016/j.sna.2008.10.004
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发表时间：
2009-01-15
影响因子：
4.6
通讯作者：
Huang, Z.
中科院分区：
文献类型：
--
作者：
Chung, Hsien-Chun;Kummari, K. Lal;Huang, Z.
将压电单晶片耦合到所附接的柔性叶片的压电风扇（piezofan）能够产生大的偏转，特别是在共振时。的压电结构的基本谐振频率（f（r））已被计算的分析方法和有限元建模，这些与实验测量进行了比较。他们之间达成了良好的协议。实验测量了压电风扇准静态工作时的自由端挠度和动态工作时的振幅（A）。我们引入f（r）x A作为压电帆的优化准则。根据这一标准的优化已进行了一些piezofan配置，如长度和位置的压电贴片，以及之间的厚度比的弹性和压电层之间的几个可用的变化。结果表明，这种优化方法是有前途的相比，以前定义的压电性能参数，如能量传输系数和机电耦合系数。(C)2008 Elsevier B.V.保留所有权利。
A piezoelectric fan (piezofan) which couples a piezoelectric unimorph to an attached flexible blade is able to produce a large deflection especially at resonance. The fundamental resonant frequencies (f(r)) of the piezofan structures have been calculated by an analytical method and finite element modelling, and these were compared with experimental measurements. Good agreements have been obtained between them. The free tip deflection at quasi-static operation or/and the vibration amplitude at dynamic operation (A) of the piezofans have been experimentally measured. We introduce f(r) x A as an optimization criterion for piezofans. Optimization according to this criterion has been carried out for some piezofan configurations, such as the length and the location of the piezo patch, as well as the thickness ratio between the elastic and piezoelectric layers among a few available variations. Results show this optimization approach to be promising when compared to previously defined piezofan performance parameters such as the energy transmission coefficient and electromechanical coupling coefficient. (C) 2008 Elsevier B.V. All rights reserved.