A helical ionic polymer-metal composite actuator for radius control of biomedical active stents
A helical ionic polymer-metal composite actuator for radius control of biomedical active stents
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DOI：
10.1088/0964-1726/20/3/035008
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发表时间：
2011-03-01
影响因子：
4.1
通讯作者：
Oh, Il-Kwon
中科院分区：
文献类型：
--
作者：
Li, Song-Lin;Kim, Woo-Young;Oh, Il-Kwon
螺旋型离子聚合物-金属复合材料（IPMC）驱动器是近年来发展起来的一种用于生物医用活性支架半径控制的新型驱动器。螺旋形IPMC致动器是通过对螺旋盘绕在玻璃棒上的IPMC条进行热处理而制成的。螺旋IPMC驱动器不仅可以实现弯曲运动，还可以实现扭转和纵向运动。特别是，螺旋IPMC致动器的动态响应进行评估，根据各种结构参数，如直径，螺距和螺旋配置的宽度。谐波响应和频率响应函数的本实验结果表明，在结构参数中，直径在有效控制螺旋支架半径所需的致动性能中起着重要作用。螺旋IPMC致动器的静态和动态响应进行了研究与阶跃和谐波的电输入，电压-电流图和机械压缩试验。这项研究表明，螺旋IPMC致动器可用于生物医学智能系统能够控制主动支架的半径。
Helical ionic polymer-metal composite (IPMC) actuators are newly developed to control the radius of biomedical active stents. The helix-shaped IPMC actuator is fabricated through the thermal treatment of an IPMC strip helically coiled on a glass rod. The helical IPMC actuator can be used to realize not only bending motion but also torsional and longitudinal motion. In particular, the dynamic responses of the helical IPMC actuators are evaluated according to various structural parameters such as diameter, pitch and width of the helical configuration. The present experimental results for the harmonic responses and frequency response functions show that diameter, among the structural parameters, plays an important role in the actuation performance required to efficiently control the radius of the helical stent. The static and dynamic responses of the helical IPMC actuators are also investigated with step and harmonic electrical inputs, a voltage-current diagram and a mechanical compression test. This study shows that a helical IPMC actuator can be used for biomedical smart systems capable of controlling the radius of active stents.