A superellipsoid-plane model for simulating foot-ground contact during human gait

Computer Methods in Biomechanics and Biomedical Engineering
D S LopesM T Silva

Abstract

Musculoskeletal models and forward dynamics simulations of human movement often include foot-ground interactions, with the foot-ground contact forces often determined using a constitutive model that depends on material properties and contact kinematics. When using soft constraints to model the foot-ground interactions, the kinematics of the minimum distance between the foot and planar ground needs to be computed. Due to their geometric simplicity, a considerable number of studies have used point-plane elements to represent these interacting bodies, but few studies have provided comparisons between point contact elements and other geometrically based analytical solutions. The objective of this work was to develop a more general-purpose superellipsoid-plane contact model that can be used to determine the three-dimensional foot-ground contact forces. As an example application, the model was used in a forward dynamics simulation of human walking. Simulation results and execution times were compared with a point-like viscoelastic contact model. Both models produced realistic ground reaction forces and kinematics with similar computational efficiency. However, solving the equations of motion with the surface contact model was found t...Continue Reading

References

Aug 1, 1990·IEEE Transactions on Bio-medical Engineering·S L DelpJ M Rosen
Jun 1, 1997·Journal of Biomechanics·C C RaaschW S Levine
Sep 5, 1998·Medical Engineering & Physics·E M Abdel-Rahman, M S Hefzy
Mar 27, 2001·Computer Methods in Biomechanics and Biomedical Engineering·FRANK C. Anderson, MARCUS G. Pandy
Mar 27, 2001·Computer Methods in Biomechanics and Biomedical Engineering·R. R. NeptuneA. J. Van Den Bogert
Mar 14, 2003·Gait & Posture·Frank C Anderson, Marcus G Pandy
Jul 13, 2007·Gait & Posture·Kotaro SasakiSara J Mulroy
Dec 24, 2008·Journal of Biomechanical Engineering·J M García-AznarL F Llanos
May 27, 2011·Computer Methods in Biomechanics and Biomedical Engineering·Tim W DornMarcus G Pandy

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