Journal
MECHATRONICS
Volume 55, Issue -, Pages 13-26Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mechatronics.2018.08.010
Keywords
Series elastic actuator; Wire-driven robot; Robot aided rehabilitation; Human force observation
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Funding
- Korea government through the National Research Foundation of Korea [NRF-2016R1A2B4016163]
- Ministry of Trade, Industry and Energy [10080547, 10080355, 10063215]
- National Research Foundation of Korea [2016R1A2B4016163] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study involves proposing an assistive device using a wire-driven Series Elastic Actuator (SEA) for leg rehabilitation that can design and provide assistive force for exercises based on the physical ability of a patient. The proposed assistive device possesses a force estimation ability to measure the mass of the leg along with the force exerted by a user in real-time. In order to achieve precise human force estimation and assistive force generation, a compact Planetary-geared Elastic Actuator, which is a type of Series Elastic Actuator is applied in the proposed device. Various algorithms to provide robust assistive force and to estimate force and work performed by the user are proposed in the study. Pilot tests were conducted with an exercise scenario that fully utilizes the functions and algorithms proposed in this study, and the effectiveness of the proposed system was validated based on two types of experiments: a healthy subject case and a patient case. The results of pilot test approve that the proposed device and algorithm enable patients to perform the exercise with ease, and increase their physical capabilities effectively.
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