介电弹性体卷形换能器设计与参数优化

Design and Parameter Optimization of Dielectric Elastomer Roll Transducer

为研究介电弹性体(DE)换能器在纯剪切拉伸模式下的发电特性,利用弹簧制作了具有预拉伸特性的DE卷形换能器,并结合Neo-Hooken模型建立了DE卷形换能器在纯剪切拉伸模式下的机电耦合数学模型,运用Matlab/Simulink软件建立了DE卷形换能器的纯剪切发电仿真模型,对DE卷形换能器的发电特性及不同弹簧系数对其发电特性的影响进行了仿真。对DE卷形换能器进行了实验,并与仿真结果对比。仿真与实验结果表明,DE卷形换能器发电特性优于一般拉伸模式换能器;在相同的拉伸条件及初始电压下,在预拉伸限制范围内,弹簧弹性系数越大其发电特性越好。

Dielectric elastomer（ DE） are a kind of novel smart materials that exhibit change in size or shape when stimulated by an electric field,based on Maxwell＇s effect. To study the power generation characteristics of dielectric elastomer transducer in pure shear tensile,dielectric elastomer roll transducer with prestretch properties was made by spring and the electromechanical coupling mode of dielectric elastomer transducer in pure shear tensile was established based on the Neo-Hooken model,and the corresponding simulation model was set up in Matlab/Simulink environment. The simulation research of the power generation characteristics of dielectric elastomer transducer and the influence of different spring coefficients on its generation characteristics were carried out. The experimental research was done by making dielectric elastomer roll transducer,and compared with the simulation results. The simulation and test results showed that the power characteristics of dielectric elastomer roll transducer were higher than those of the general tensile mode transducer. Under the same condition of tensile mode,initial voltage and the prestretch limitations, the power characteristic was increased with the increase of elastic coefficient. The above results about dielectric elastomer roll transducer provided theoretical reference for applications of dielectric elastomer generators in the field of vibration energy harvesting in the future.