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首页> 外文期刊>International Journal of Solids and Structures >Dynamic response of tubular dielectric elastomer transducers
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Dynamic response of tubular dielectric elastomer transducers

机译：管状介电弹性体换能器的动态响应

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In this paper, a numerical model for the dynamic response of tubular dielectric elastomer transducers is presented and validated with experimental results for the first time. Dielectric elastomers (DE) are soft polymer based smart materials that can be potentially employed in applications such as actuation, sensing and energy harvesting (Kornbluh, 2004; Carpi et al., 2005; Waki et al., 2008). In our previous work, the quasi-static response of tubular DE transducers was studied (Goulbourne et al., 2007; Son and Goulbourne, 2009). Here, a numerical model is developed to predict the dynamic response of tubular DE transducers. Inertia effects are included in our previous static model which yields a system of partial differential equations. The results of the dynamic response of the tubular DE transducers are obtained by numerically solving the simplified partial different equations using a finite difference scheme. The capacitance change induced by the dynamic deformation of the tubular DE is also calculated by a simple electrostatic model, illustrating dynamic passive sensing. Several tubular DE transducer samples (VHB 4905 and silicone) were fabricated and an experimental setup was developed to investigate the dynamic response by measuring capacitance and radial deformation. In the sensing experiments, a sweep of dynamic pressure profiles (0-5 Hz) are applied. It is observed that silicone transducers have a larger dynamic sensing range. In the actuation experiments, the deformation of the silicone actuator is monitored while a voltage signal (4.5 kV) is applied from 0 to 30 Hz. The silicone actuator shows a good actuation response. The comparison between numerical and experimental results for the DE transducers shows an overall error of 3%.
机译：本文首次提出了管状介电弹性体换能器动态响应的数值模型，并首次通过实验结果进行了验证。介电弹性体（DE）是一种基于软聚合物的智能材料，可以潜在地应用于诸如致动，传感和能量收集等应用中（Kornbluh，2004; Carpi等，2005; Waki等，2008）。在我们以前的工作中，研究了管状DE换能器的准静态响应（Goulbourne等，2007; Son和Goulbourne，2009）。在此，开发了一个数值模型来预测管状DE换能器的动态响应。惯性效应包含在我们以前的静态模型中，该模型产生了偏微分方程组。管状DE换能器的动态响应结果是通过使用有限差分方案对简化的偏差分方程进行数值求解而获得的。由管状DE的动态变形引起的电容变化也可以通过一个简单的静电模型来计算，该模型说明了动态被动感应。制作了几个管状DE换能器样品（VHB 4905和硅树脂），并开发了实验装置以通过测量电容和径向变形来研究动态响应。在传感实验中，应用了动态压力曲线（0-5 Hz）的扫描。可以看出，硅传感器具有更大的动态感应范围。在驱动实验中，在施加0至30 Hz的电压信号（4.5 kV）的同时，监控硅树脂驱动器的变形。硅树脂致动器显示出良好的致动响应。 DE换能器的数值和实验结果之间的比较显示总误差为3％。

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