http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
G. G. Forrest,M.A.Sc.,E. A. Croft,A. J. Hodgson 한국과학기술원 인간친화 복지 로봇 시스템 연구센터 2006 International Journal of Assistive Robotics and Me Vol.7 No.4
In this work, we investigate the potential of using an air-muscle actuated orthosis controlled by an electromyographic (EMG) signal to reliably augment the grasping force of the hand, thereby allowing the user to reduce the muscle activation required for a power-grasping task. In particular, we tested the hypotheses that subjects could stably handle objects and learn to reduce both their grip force and muscle activation levels with force supplementation. In this study, a surface-mounted EMG sensor on the flexor digitorum provides the input to a proportional-integral-derivative controller governing the force generated by the orthosis. Nine subjects performed a sequence of unassisted and assisted lifts of a weighted and instrumented cylinder. When using the orthotic system to lift the cylinder, subjects reliably reduced their mean grip force and mean contraction level (measured as % Maximum Voluntary Contraction, or %MVC) (p<0.01).<BR> The grip force applied to the cylinder dropped for seven of the nine subjects (p<0.01) and the %MVC dropped for eight of the nine subjects (p<0.01). None of the subjects exhibited any instability or reported any difficulties when using the orthosis. On average, the subjects reduced their %MVC and grasp force by 31% and 56% respectively, so using an air-muscle-powered orthosis controlled by an ipsilateral EMG signal appears to be a feasible concept.