Abstract
Assistive devices can be worn to enhance the wearer's strength. Such devices need to be safe for the wearer Pneumatic actuators are suitable for driving those devices because they are highly safe for humans. However, the responsiveness of pneumatic actuators is lower than that of electric actuators due to the compressibility of air. In this paper, we use the initial burst in muscle activity to avoid delay in activating our pneumatic arm assistive device for the wearer's motion. The initial burst that always occurs first in voluntary movements indicates the wearer's preparation for movement. It is detected based on an inflection point on the cumulative addition curve obtained from a surface electromyogram signal. Experimental verification shows that the activation of the assistive device prior to the wearer's actual movement is possible.
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