介电弹性体圆柱形驱动器的机电耦合致动原理南京航空航天大学.DOC

介电弹性体圆柱形驱动器机电耦合致动过程分析 罗华安1，2 王化明1 游有鹏 （1.南京航空航天大学机电学院，江苏 南京210016；1. 江苏省精密与微细制造技术重点实验室，江苏 南京 邮政编码:210016；2.南京信息职业技术学院机电学院，江苏 南京210046）摘要：关键词： 中图分类号： 文献标识码：Analysis of Electromechanical Coupling Activation Process of Dielectric Elastomer Cylindrical Actuator Luo Huaan1, 2， Wang Huaming1， You Youpeng1 （1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 China; 1. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing, 210016, China; 2. Institute of Mechanical and Electrical Engineering, Nanjing College of Information Technology, Nanjing , 210046, China）  Abstract：The axial force difference aroused from applying high DC voltage on the actuator film make the cylindrical actuator elongate. In order to study the dynamic response of dielectric elastomer cylindrical actuator, the process of electromechanical coupling activation were analyzed in this paper. The electromechanical coupling activation process of cylindrical actuator is similar to creep. A general linear viscoelastic Voigt model was put forward to describe the process and the principal reasons for the error between calculated result and experiment were also discussed. The model was modified according to the nonlinear quasi-static displacement and axial stress change of actuator during its actuation process. Experiment results show that the modified general Voigt model is suitable to characterize the electromechanical coupling process of cylindrical actuator within the working voltage range. Therefore，the presented model can be used for prediction and optimization of dielectric elastomer cylindrical actuators. Key words：dielectric elastomer cylindrical actuator; electromechanical coupling; activation process; Voigt model 引言 介电弹性体驱动器（DEA）主要由介电弹性体膜和涂覆在其两侧的柔性电极组成，当在电极上施加电压，由相异电荷作用产生的静电压力使膜产生压缩，使在未涂覆电极端产生扩张变形。利用此特性制作的介电弹性体驱动器，具有大弹性、高变形率和高能量密度及重量轻的特点。2004年起，美国人工肌肉公司 (AMI)陆续推出商业化驱动器产品，主要有标准化的通用驱动器平台，及其与电源、控制器集成的阀及泵、