35 Hz shape memory alloy actuator with bending-twisting mode

Collection with item attached
2016
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/473421.do
DOI
10.1038/srep21118
Title
35 Hz shape memory alloy actuator with bending-twisting mode
Description
This work was supported by the Industrial Strategic technologydevelopment program (10049258) funded by the Ministry of KnowledgeEconomy (MKE, Korea), Bio-Mimetic Robot Research Center funded byDefense Acquisition Program Administration, and by Agency for DefenseDevelopment (UD130070ID) and National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIP)(No. 2012R1A3A2048841).
abstract
Shape Memory Alloy (SMA) materials are widely used as an actuating source for bending actuators due to their high power density. However, due to the slow actuation speed of SMAs, there are limitations in their range of possible applications. This paper proposes a smart soft composite (SSC) actuator capable of fast bending actuation with large deformations. To increase the actuation speed of SMA actuator, multiple thin SMA wires are used to increase the heat dissipation for faster cooling. The actuation characteristics of the actuator at different frequencies are measured with different actuator lengths and results show that resonance can be used to realize large deformations up to 35 Hz. The actuation characteristics of the actuator can be modified by changing the design of the layered reinforcement structure embedded in the actuator, thus the natural frequency and length of an actuator can be optimized for a specific actuation speed. A model is used to compare with the experimental results of actuators with different layered reinforcement structure designs. Also, a bend-twist coupled motion using an anisotropic layered reinforcement structure at a speed of 10 Hz is also realized. By increasing their range of actuation characteristics, the proposed actuator extends the range of application of SMA bending actuators.
provenance
Made available in Cube on 2018-09-28T10:19:04Z (GMT). No. of bitstreams: 0
language
English
author
Song, Sung-Hyuk
Lee, Jang-Yeob
Rodrigue, Hugo
Choi, Ik-Seong
Kang, Yeon June
Ahn, Sung-Hoon
accessioned
2018-09-28T10:19:04Z
available
2018-09-28T10:19:04Z
issued
2016
citation
SCIENTIFIC REPORTS(6)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/473421.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345258218
Jurisdiction
Rep.of Korea
Project Name
BK21+ Transformative Training Program for Creative Mechanical and Aerospace Engineers
rights
openAccess
type
article


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