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Rapid Stationary Prototyping FES System for Walking and Grasping Neuroprostheses


T. Keller

International Functional Electrical Stimulation Society Conference, Sendai, Japan

A rapid prototyping FES system was developed that allows a modular implementation of walking and grasping neuroprostheses. Different sensor systems for the control of the neuroprostheses and different control strategies can be tested and tuned on the same system. This concept is more flexible compared to other FES systems that are built with a fixed set of sensors and a limited number of control strategies. The rapid prototyping FES system consists of an eight channel constant current FES device for surface stimulation that is PC controllable, an eight channel data acquisition board and a closed-loop controller software programmed on a standard PC using LabVIEW. A graphical user interface allows a fast adjustment of all parameters, including the stimulation patterns, the sensor and controller settings. All parameters are stored in setup files and therefore allow a fast re-configuration of the neuroprosthesis to the individual subject's needs. The rapid prototyping FES system was used to design individual grasping or walking neuroprostheses for 9 SCI and 2 stroke subjects. In a second phase the individual settings were transferred to a portable FES system.

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