A stiffness-varying model of human gait

X. H. Duan, Robert Allen, J. Q. Sun

Research output: Contribution to journalArticle

Abstract

We report on a conceptual two degrees of freedom (2 DOF) human gait model, which incorporates nonlinear joint stiffness as a stabilizing agent. Specifically, muscle spring-like property provides inherent stability during gait move-meat using a nonlinear angular spring and dash pot at each joint. The instability problem of the gait model in direct dynamic analysis is overcome by simulating the human co-contrastion muscle function. By developing dynamic system stability requirements and hypothesizing a minimum joint stiffness criterion, we determine time-varying joint stiffness. Optimum joint stiffness are present for varying gait pattern, stride lengths and cadences. We conclude that nonlinear joint stiffness can be incorporated into gait models to overcome stability problems inherent in such linkage models.

Original languageEnglish (US)
Pages (from-to)518-524
Number of pages7
JournalMedical Engineering and Physics
Volume19
Issue number6
DOIs
StatePublished - Sep 1 1997

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Gait
Joints
Stiffness
Muscle
Meats
Muscles
System stability
Excipients
Dynamic analysis
Dynamical systems
Meat

Keywords

  • Gait
  • Joint stifness
  • Model

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering

Cite this

A stiffness-varying model of human gait. / Duan, X. H.; Allen, Robert; Sun, J. Q.

In: Medical Engineering and Physics, Vol. 19, No. 6, 01.09.1997, p. 518-524.

Research output: Contribution to journalArticle

Duan, X. H. ; Allen, Robert ; Sun, J. Q. / A stiffness-varying model of human gait. In: Medical Engineering and Physics. 1997 ; Vol. 19, No. 6. pp. 518-524.
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