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Design and Evaluation of a Digital Closed-Loop Controller for the Regulation of Muscle Force by Recruitment Modulation

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3 Author(s)
Wilhere, George F. ; Applied Neural Control Laboratory, Departments of Biomedical Engineering and Systems Engineering, Case Western Reserve University ; Crago, P.E. ; Chizeck, H.J.

In principle, orthoses employing electrically stimulated muscles can be improved by the incorporation of closed-loop control systems to regulate muscle output. One obstacle to attaining acceptable closed-loop control systems is the muscle recruitment characteristic, a memoryless, nonlinear, time-varying relationship between the recruitment modulation stimulus parameter (pulsewidth or amplitude) and the muscle force.

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Biomedical Engineering, IEEE Transactions on  (Volume:BME-32 ,  Issue: 9 )