Gait control of electro-hydraulic above-knee prostheses

Ming-Shaung Ju, Y. F. Yang, T. C. Hsueh

Research output: Contribution to journalArticle

1 Citation (Scopus)


In this work the testing of a microcomputer controlled electro-hydraulic above-knee prosthesis is performed. The prosthesis control system consists of a four-bar knee, a socket that fits a volunteer amputee's residual thigh, four foot switches, interface circuits and an IBM 486 personal computer. A proportional plus derivative (PD) control law and a fuzzy control law are employed to control the artificial knee to achieve a fixed cadence and free cadences. The experimental results indicate that swing phase gait of the amputee can be improved by the actively controlled artificial knee. The control parameters found in the test bed developed in previous work can be successfully applied for human testing.

Original languageEnglish
Pages (from-to)22-30
Number of pages9
JournalBiomedical Engineering - Applications, Basis and Communications
Issue number1
Publication statusPublished - 1995 Jan 1

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Bioengineering
  • Biomedical Engineering

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