Title :
Adaptive control of cyclic movements as muscles fatigue using functional neuromuscular stimulation
Author :
Riess, JoAnne ; Abbas, James A.
Author_Institution :
Center for Biomed. Eng., Kentucky Univ., Lexington, KY, USA
Abstract :
For individuals with spinal cord injuries, functional neuromuscular stimulation (FNS) systems can be used to activate paralyzed muscles in order to restore function, provide exercise, or assist in movement therapy. In previous work, the pattern generator/pattern shaper (PG/PS) adaptive controller was evaluated on subjects with spinal cord injuries and was able to automatically adjust stimulation parameters to account for individual subject differences and system response nonlinearities. In this study, the PG/PS control system was utilized in extended trials. Results indicated that the controller adapted stimulation patterns in an online manner to account for changes in system properties due to fatigue.
Keywords :
adaptive control; biocontrol; feedforward neural nets; motion control; neurocontrollers; neuromuscular stimulation; patient rehabilitation; adaptive control; cyclic movements; feedforward control; functional neuromuscular stimulation; individual subject differences; movement therapy; muscles fatigue; neural net controller; paraplegia; pattern generator/pattern shaper; spinal cord injuries; stimulation parameters; system response nonlinearities; Adaptive control; Automatic control; Automatic generation control; Control systems; Fatigue; Medical treatment; Muscles; Neuromuscular stimulation; Programmable control; Spinal cord injury; Adult; Biofeedback (Psychology); Electric Stimulation Therapy; Female; Humans; Knee Joint; Male; Muscle Fatigue; Muscle, Skeletal; Nerve Net; Neural Networks (Computer); Neuromuscular Junction; Paraplegia; Range of Motion, Articular; Spinal Cord Injuries; Therapy, Computer-Assisted;
Journal_Title :
Neural Systems and Rehabilitation Engineering, IEEE Transactions on
DOI :
10.1109/7333.948462