Experimental evaluation of an adaptive feedforward controller for use in functional neuromuscular stimulation systems

James Abbas, R. J. Triolo

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

An adaptive feedforward control system has been evaluated for use in functional neuromuscular stimulation (FNS) systems. The control system, which utilizes neural network techniques, was used to generate isometric muscle contractions to track a periodic torque trajectory signal. The evaluation of the control system was performed using percutaneous intramuscular electrodes to stimulate the quadriceps muscles of spinal cord injured adolescents. Results of the evaluation indicate that the control system automatically customized its parameters for controlling isometric muscle torque in a particular muscle and that the parameters were adapted on-line to account for changes in muscle properties due to fatigue. This study demonstrates that this control system may play an important role in the development of practical FNS systems that are capable of automatically adjusting stimulation parameters to fit the needs of a particular individual at a given time.

Original languageEnglish (US)
Pages (from-to)12-22
Number of pages11
JournalIEEE Transactions on Rehabilitation Engineering
Volume5
Issue number1
DOIs
StatePublished - Mar 1997
Externally publishedYes

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Muscle
Torque
Control systems
Muscles
Controllers
Isometric Contraction
Quadriceps Muscle
Muscle Contraction
Fatigue
Spinal Cord
Electrodes
Feedforward control
Trajectories
Fatigue of materials
Neural networks

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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