Development of Actively Controlled Electro-Hydraulic Above-Knee Prostheses

  • M. S. Ju
  • Y. F. Yang
  • T. C. Hsueh
Conference paper
Part of the International Centre for Mechanical Sciences book series (CISM, volume 361)


In previous works, a four-bar linkage above-knee (AK) prosthesis with an electro-hydraulic controller was built. A mechanical model of an amputee who wears the actively controlled prosthesis was developed and simulations of the man-machine system were performed. To obtain a reliable design a test rig is built for evaluating the knee controller performance. In this work gait testing of an amputee is performed and the human test results indicate that the amputee swing phase gait can be improved by the active knee controller based on either PD or fuzzy controls.


Fuzzy Control Fuzzy Controller Walking Speed Passive Control Knee Angle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Dyck, W.R. and Hobson, D.A., Voluntary Controlled Electro-Hydraulic Above-Knee Prosthesis, Bull. Prosth. Res., (1975), p. 169.Google Scholar
  2. 2.
    Zarrugh, M.Y and Radcliffe, C.W., Simulation of Swing Phase Dynamics in Above-Knee Prosthesis, J. of Biomechanics, Vol. 9 (1976), p. 283.CrossRefGoogle Scholar
  3. 3.
    Bar, A. and Ishai, G., Evaluation of AK Prosthesis Comparing Conventional with Adaptive Knee Control Devices, Journal Biomed. Eng., Vol. 6 (1984), p. 27.CrossRefGoogle Scholar
  4. 4.
    Koganezawa, K. and Kato, I., Control Aspects of Artificial Leg, in IFAC Control Aspect of Biomedical Engineering, edited by Maciej Nalecz, (1987), p. 71.Google Scholar
  5. 5.
    Wang, T. K., Ju, M.S. and Tsuei, Y.G., Adaptive Control of Above Knee Electro-Hydraulic Prostheses, Tran. ASME, Journal of Biomechanical Engineering, Vol. 114, n 3 (1992), p. 421.CrossRefGoogle Scholar
  6. 6.
    Tsai, P. J., Ju, M.S. and Tsuei, Y.G., Development of Electrohydraulic Controlled Above-Knee Prostheses, JSME International Journal, Series C, v 36, n 3 (1993), p. 347.Google Scholar
  7. 7.
    Tsai, C.S. and Mansour, J.M., Swing Phase Simulation and Design of Above Knee Prostheses, Tran. ASME, J. of Biomech. Engrg., Vol. 108 (1986), p. 65.CrossRefGoogle Scholar
  8. 8.
    Chao, E.Y.S. and Rim, K., Application of Optimization Principles in determining the Applied Moment in Human Leg Joint During Gait, J. of Biomechanics, Vol. 6 (1973), p. 497–510.CrossRefGoogle Scholar
  9. 9.
    Kane, T. R., Spacecraft Dynamics, McGraw-Hill Book Company, (1983).Google Scholar
  10. 10.
    VAX UNIX MACSYMA Reference Manual, Version 11, Symbolics, Inc., (1985).Google Scholar
  11. 11.
    Ju, M.-S. and Mansour, J.M., Simulation of the Double Limb Support Phase of Human Gait, Tran. ASME, J. of Biomech. Engrg., Vol. 110 (1988), p. 223.CrossRefGoogle Scholar
  12. 12.
    Ju, M. S., Lin, J. H. and Chou, Y. L., Dynamical Optimal Design of Above-Knee Constant Friction Prostheses, ASME Advance in Bioengineering, (1989), p. 55.Google Scholar
  13. 13.
    Ju, M.S., Yi, S. H., Tsuei, Y.G. amp; Chou, Y.L., Fuzzy Control of Electro-Hydraulic Above-Knee Prostheses, submitted to JSME International Journal.Google Scholar
  14. 14.
    Winter, D.A., Biomechanics of Human Movement, John Wiley amp; Sons, N.Y. 1979.Google Scholar

Copyright information

© Springer-Verlag Wien 1995

Authors and Affiliations

  • M. S. Ju
    • 1
  • Y. F. Yang
    • 1
  • T. C. Hsueh
    • 1
  1. 1.National Cheng Kung UniversityTainanTaiwan

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