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논문 기본 정보

저자정보
(경상국립대학교) (경상국립대학교) (경상국립대학교)
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제어로봇시스템학회 제어로봇시스템학회 논문지 제어로봇시스템학회 논문지 제31권 제10호
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    초록·키워드

    This study proposes a novel ankle assistive device using a reaction wheel mechanism with mechanical braking to support push-off in gait. Unlike conventional joint-aligned exoskeletons, the proposed design avoids axis misalignment and enables ankle assistance without generating torque along the joint axis. Kinetic energy is stored in a high-speed spinning wheel and rapidly released using a pawl-ratchet mechanism, producing an impulsive torque without requiring a high-power motor. Experiments using a pendulum-type testbed demonstrated that the device can generate over 8 Nm of torque in just 0.03 seconds, satisfying the push-off phase timing requirements. Human-subject trials showed an average anterior-posterior ground reaction force increase of approximately 11.5% of body weight during activation, confirming the device’s assistive potential. A nonlinear model was also established to estimate key parameters using least-squares optimization and stochastic analysis. These results demonstrate the feasibility of ankle assistance using impulsive momentum.

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      UCI(KEPA) : I410-151-26-02-094406670