Harnessing electromechanical membrane wrinkling for actuation
Harnessing electromechanical membrane wrinkling for actuation
复制标题
DOI：
10.1063/1.4764101
复制
发表时间：
2012-10-22
影响因子：
4
通讯作者：
Rossiter, Jonathan
中科院分区：
文献类型：
--
作者：
Conn, Andrew T.;Rossiter, Jonathan
介电弹性体是一种柔软的机电换能器，在大电场下会表现出不稳定的振动行为。这种不稳定性可以通过优化电极边界来利用，以加重或减弱局部化的扭曲。提出了一个分析模型，该模型表明，随着电极几何形状从凸向凹变化，引起毛刺的临界电场可以降低。这允许单个介电弹性体膜在特定区域中产生双轴或单轴延伸。一个原型56 μ m厚的膜致动器结合了这一原则，以产生一个平面内的旋转输出，产生15.7度的致动行程。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4764101]
Dielectric elastomers are soft electromechanical transducers that can exhibit unstable wrinkling behavior under large electric fields. This instability can be exploited by optimizing electrode boundaries to accentuate or attenuate localized wrinkling. An analytical model is presented, which demonstrates that the critical electric field to induce wrinkling can be lowered as the electrode geometry changes from convex to concave. This allows a single dielectric elastomer membrane to generate either biaxial or uniaxial extension in specific regions. A prototype 56 mu m thick membrane actuator incorporates this principle to generate an in-plane rotational output, producing an actuation stroke of 15.7 degrees. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4764101]