13 Citations (Scopus)

Abstract

This study is aimed at establishing a neural network and fuzzy feedback control FES system used for adjusting the optimum electrical stimulating current to control the motion of an ankle joint. The proposed method further improves the drop-foot problem existing in hemiplegia patients. The proposed system includes both hardware and software. The hardware system determines the patient's ankle joint angle using a position sensor located in the patient's affected side. This sensor stimulates the tibialis anterior with an electrical stimulator that induces the dorsiflexion action and achieves the ideal ankle joint trace motion. The software system estimates the stimulating current using a neural network. The fuzzy controller solves the nonlinear problem by compensating the motion trace errors between the neural network control and actual system. The control qualities of various controllers for four subjects were compared in the clinical test. It was found that both the root mean square error and the mean error were minimal when using the neural network and fuzzy controller. The drop-foot problem in hemiplegic's locomotion was effectively improved by incorporating the neural network and fuzzy controller with the functional electrical simulator.

Original languageEnglish
Pages (from-to)32-38
Number of pages7
JournalJournal of Medical Engineering and Technology
Volume28
Issue number1
DOIs
Publication statusPublished - Jan 2004

Fingerprint

Ankle Joint
Locomotion
Fuzzy control
Neural networks
Foot
Software
Controllers
Hemiplegia
Quality Control
Hardware
Sensors
Mean square error
Feedback control
Quality control
Simulators
Control systems

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics
  • Health Information Management

Cite this

Neural network and fuzzy control in FES-assisted locomotion for the hemiplegic. / Chen, Yu Luen; Chen, Shih Ching; Chen, Weoi Luen; Hsiao, Chin Chih; Kuo, Te Son; Lai, Jin Shin.

In: Journal of Medical Engineering and Technology, Vol. 28, No. 1, 01.2004, p. 32-38.

Research output: Contribution to journalArticle

Chen, Yu Luen ; Chen, Shih Ching ; Chen, Weoi Luen ; Hsiao, Chin Chih ; Kuo, Te Son ; Lai, Jin Shin. / Neural network and fuzzy control in FES-assisted locomotion for the hemiplegic. In: Journal of Medical Engineering and Technology. 2004 ; Vol. 28, No. 1. pp. 32-38.
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