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Journal of Zhejiang University SCIENCE A

ISSN 1673-565X(Print), 1862-1775(Online), Monthly

Typical dielectric elastomer structures: dynamics and application in structural vibration control

Abstract: In recent years, dielectric elastomer (DE) structures have received great attention in various fields of engineering, such as artificial muscle, soft robot, resonator, and structural vibration control, due to its prominent advantages. In the present paper, the theoretical and experimental research into the dynamical behavior of DE structures and their application for vibration control is reviewed. In the theoretical research into dynamical behavior, from a mechanics viewpoint, DE structures are usually categorized into four types, i.e., spherical, rectangular, tubular, and circular. For each type of DE structure, the mathematical description is given and the dynamical behavior, such as the resonant property, jump, and bifurcation, is summarized. Moreover, the work on dynamical experiments is briefly outlined. In the application for vibration control, stack-type and tubular-type DE structures usually used as actuators are surveyed. The established control algorithms for the controlled systems using DE actuators are described. The challenges for the research into the dynamics of DE structure and its application for vibration control and some promising theories which may be applied for the research are pointed out.

Key words: Dielectric elastomer (DE), Dynamical behavior, Vibration control, Control algorithm, Random disturbance

Chinese Summary  <1240> 典型介电弹性体结构:动力学及其在结构振动控制中的应用

目的:介电弹性体由于其卓越的优势受到工程界的广泛关注。本文主要综述典型介电弹性结构的动力学的理论和实验研究及其在振动控制中的应用,并指出其中存在的挑战及可能应用于研究的理论。
创新点:1. 综述四类典型介电弹性体结构的动力学数学模型和动力学行为,以及相应的动力学实验结果研究;2. 综述两类典型的介电弹性体结构在振动控制中的应用及相应的控制算法。
方法:1. 从力学的角度出发,根据介电弹性体的结构形状,研究球形、矩形、管状及圆形介电弹性体结构的动力学模型数学描述及动力学行为;2. 实验分析介电弹性体结构的面内及离面动力学行为;3. 分析堆栈式和管状式介电弹性体结构在振动控制中的应用及控制算法。
结论:1. 现有的介电弹性体结构动力学方面的理论研究局限于使用低阶模态,对高阶模态还未涉及; 2. 现有施加在介电弹性体结构的机械力和电压都是时间的确定性函数,随机情形还属于空白;3. 对介电弹性体结构的随机最优控制,特别是以电压为控制项还未研究。

关键词组:介电弹性体;动力学行为;振动控制;控制算法;随机激励


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DOI:

10.1631/jzus.A1500345

CLC number:

O32

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On-line Access:

2016-05-04

Received:

2015-12-28

Revision Accepted:

2016-03-02

Crosschecked:

2016-04-15

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