Preliminary Tests of a Practical Fuzzy FES Controller Based on Cycle-to-Cycle Control in the Knee Flexion and Extension Control

Takashi WATANABE  Tomoya MASUKO  Achmad ARIFIN  

IEICE TRANSACTIONS on Information and Systems   Vol.E92-D    No.7    pp.1507-1510
Publication Date: 2009/07/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E92.D.1507
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Biological Engineering
functional electrical stimulation,  FES,  fuzzy control,  cycle-to-cycle control,  automatic tuning,  

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The fuzzy controller based on cycle-to-cycle control with output value adjustment factors (OAF) was developed for restoring gait of paralyzed subjects by using functional electrical stimulation (FES). Results of maximum knee flexion and extension controls with neurologically intact subjects suggested that the OAFs would be effective in reaching the target within small number of cycles and in reducing the error after reaching the target. Oscillating responses between cycles were also suppressed. The fuzzy controller was expected to be examined to optimize the OAFs with more subjects including paralyzed patients for clinical application.

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