Modeling framework for macroscopic dynamics of twisted and coiled polymer actuator driven by Joule heating focusing on energy and convective heat transfer
Modeling framework for macroscopic dynamics of twisted and coiled polymer actuator driven by Joule heating focusing on energy and convective heat transfer
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DOI：
10.1016/j.sna.2017.10.016
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发表时间：
2017-11-01
影响因子：
4.6
通讯作者：
Tahara, Kenji
中科院分区：
文献类型：
--
作者：
Masuya, Ken;Ono, Shu;Tahara, Kenji
建立了焦耳热驱动的扭转螺旋聚合物致动器（TCPA）的非线性动力学模型。TCPA是一种基于扭曲和卷曲的聚合物通过加热收缩的现象的致动器。发现这一现象后，TCPA受到了相当大的研究关注。尽管提出了几种传统的模型来解释TCPA行为，但它们没有解决真实的TCPA的几个特征，即位移对温度的延迟、温度行为对输入（焦耳加热）以及对流热传递对位移和温度之间的关系的影响。本文提出的宏观建模框架解释了这些属性。该模型的主要思想是（1）与TCPA有关的能量，（2）对流换热系数的温度和速度依赖性。对三种TCPA进行了实验。结果表明，该模型比传统模型具有更好的可行性。特别是，所提出的模型减少了超过50%的预测误差的位移相比，传统的模型。(C)2017爱思唯尔B.V.保留所有权利。
In this paper, a nonlinear dynamics model of the twisted and coiled polymer actuator (TCPA) driven by Joule heating is proposed. TCPA is an actuator based on the phenomenon that the twisted and coiled polymer contracts by heating. TCPA has received considerable research attention after the discovery of this phenomenon. Although several conventional models were proposed to explain TCPA behavior, they do not address several characteristics of a real TCPA, namely, the delay of the displacement to the temperature, temperature behavior to the input (Joule heating), and effect of the convective heat transfer on the relationship between the displacement and temperature. The macroscopic modeling framework presented herein explains these properties. The main ideas of the proposed model are (1) the energy relating to TCPA, and (2) the temperature and velocity dependence of the convective heat transfer coefficient. Experiments were conducted for three kinds of TCPA. It was verified that the proposed model is more viable than a conventional model. In particular, the proposed model reduced the prediction errors of the displacement by more than 50% compared with the conventional model. (C) 2017 Elsevier B.V. All rights reserved.