Physical disabilities such as full or partial loss of function in shoulder, elbow or wrist is a common ailment due to geriatric disorder and other disease processes. To assist such physically disabled and or elderly people, we have been developing a 3DOF mobile exoskeleton robot for rehabilitation and for assisting motion of elbow and shoulder, since human shoulder and elbow motions are involved in a lot of activities of everyday life. The exoskeleton robot is mainly activated and is controlled by the skin surface electromyogram (EMG) signals, since EMG signals of muscles directly reflect how the subject intends to move. In this paper, we propose neuro-fuzzy based motion control with obstacle avoidance behavior of a robotic exoskeleton for rehabilitation and assisting motion of upper-limb of physically disabled or elderly persons.

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