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http://dx.doi.org/10.7736/KSPE.2016.33.3.173

Design of Clutch Mechanism for Increased Actuator Energy Efficiency of Electrically Actuated Lower Extremity Exoskeleton  

Kim, Ho Jun (Department of Mechanical Engineering, Hanyang University)
Kim, Wan Soo (Research Institute of Engineering & Technology, Hanyang University)
Lim, Dong Hwan (Department of Mechanical Engineering, Hanyang University)
Han, Chang Soo (Department of Robot Engineering, Hanyang University)
Publication Information
Journal of the Korean Society for Precision Engineering / v.33, no.3, 2016 , pp. 173-181 More about this Journal
Abstract
This paper reports on the development of a roller-cam clutch mechanism. This mechanism can transfer bidirectional torque with high backdrivability, as well as increase actuation energy efficiency, in electrical exoskeleton robots. The developed mechanism was installed at the robot knee joint and unclutched during the swing phase which uses less metabolic energy, thereby functioning as a passive joint. The roller-cam clutch aimed to increase actuation energy efficiency while also producing high backdrivability by generating zero impedance for users during the swing phase. To develop the mechanism, mathematical modeling of the roller-cam clutch was conducted, with the design having more than three safety factors following optimization. Titanium (Ti-6AL-4V) material was used. Finally, modeling verification was done using ANSYS software.
Keywords
Roller-Cam clutch mechanism; Exoskeleton robot; Backdrivability; Energy efficiency; Design optimization;
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Times Cited By KSCI : 2  (Citation Analysis)
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