Design of an Impact Drive Actuator Using a Shape Memory Alloy Wire

Title
Design of an Impact Drive Actuator Using a Shape Memory Alloy Wire
Authors
Hattori, ShinyaHara, MasayukiNabae, Hiroyuki황동현Higuchi, Toshiro
Keywords
Shape memory alloy; Impact drive mechanism; Linear actuator
Issue Date
2014-11
Publisher
Sensors and actuators. A, Physical
Citation
VOL 219, 47-57
Abstract
This paper introduces an impact drive mechanism (IDM) that utilizes the rapid contraction property of shape memory alloy (SMA) wire. In this study, possible structures for an SMA-wire-based IDM actuator are investigated, and a prototype actuator comprising a main body, an inertia body, an SMA wire, and a bias spring is developed. To verify the applicability of the prototype actuator as a positioning device, driving experiments were conducted under various conditions. The experimental results demonstrated that the prototype actuator enables bidirectional step-like movement with several step sizes by changing the profile of applied voltage, such as amplitude, duty cycle, and frequency. In addition, we developed PI-controller-based position control systems by using these three parameters as control input; the control characteristics and potential applications of each method were discussed. These results implied that the SMA-wire-based IDM actuator has the potential to be used as a new linear actuator in sub-millimeter order driving.
URI
http://pubs.kist.re.kr/handle/201004/51040
ISSN
09244247
Appears in Collections:
KIST Publication > Article
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