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Control of Stair Ascent and Descent With a Powered Transfemoral Prosthesis

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5 Author(s)
Lawson, B. ; Dept. of Mech. Eng., Vanderbilt Univ., Nashville, TN, USA ; Varol, H.A. ; Huff, A. ; Erdemir, E.
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This paper presents a finite state-based control system for a powered transfemoral prosthesis that provides stair ascent and descent capability. The control system was implemented on a powered prosthesis and evaluated by a unilateral, transfemoral amputee subject. The ability of the powered prosthesis to provide stair ascent and descent capability was assessed by comparing the gait kinematics, as recorded by a motion capture system, with the kinematics provided by a passive prosthesis, in addition to those recorded from a set of healthy subjects. The results indicate that the powered prosthesis provides gait kinematics that are considerably more representative of healthy gait, relative to the passive prosthesis, for both stair ascent and descent.

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Neural Systems and Rehabilitation Engineering, IEEE Transactions on  (Volume:21 ,  Issue: 3 )