Twist-coil coupling fibres for high stroke tensile artificial muscles

被引：21
作者：
Aziz, Shazed [1 ,2 ]
Naficy, Sina [3 ]
Foroughi, Jayad [1 ,2 ]
Brown, Hugh R. [1 ,2 ]
Spinks, Geoffrey M. [1 ,2 ]
机构：
[1] Univ Wollongong, ARC Ctr Excellence Electromat Sci, Innovat Campus,Squires Way, North Wollongong, NSW 2522, Australia
[2] Univ Wollongong, Intelligent Polymer Res Inst, Innovat Campus,Squires Way, North Wollongong, NSW 2522, Australia
[3] Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2018年 / 283卷
基金：
澳大利亚研究理事会;
关键词：
Artificial muscle; Polymer fibre; Twist-coil coupling; Torsional actuator; Tensile actuator; LOOP FORMATION; YARNS; ACTUATION;
D O I：
10.1016/j.sna.2018.09.057
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A new concept for tensile artificial muscles is introduced in which the torsional actuation of a twisted polymer fibre drives a twist to writhe conversion in a serially attached elastomeric fibre. Thermally induced torsional rotation of the twisted fibre caused formation of coils in the elastomeric fibre which resulted in overall muscle length contraction. Theoretical predictions of the muscle strain were developed by means of a modified single-helix theory. Experimental tests were conducted to measure the isotonic contraction strains for elastomeric fibres of different diameters and lengths. A good agreement between the measured and calculated results was found. Practical applicability of this muscle is evaluated by using different mechanical loading conditions. Actuation contraction strains as high as 10% were observed with excellent reversibility. Unlike original coiled fibre tensile actuators, these twist-coil artificial muscles did not require any pre-conditioning cycles. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：98 / 106
页数：9
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