A Biomechanical Model for Actively Controlled Snow Ski Bindings

[+] Author and Article Information
M. L. Hull, J. E. Ramming

Department of Mechanical Engineering, University of California, Davis, Calif. 95616

J Biomech Eng 102(4), 326-331 (Nov 01, 1980) (6 pages) doi:10.1115/1.3138230 History: Received January 29, 1980; Online June 15, 2009


Active control of snow ski bindings is a new design concept which potentially offers improved protection from lower extremity injury. Implementation of this concept entails measuring physical variables and calculating loading and/or deformation in injury prone musculoskeletal components. The subject of this paper is definition of a biomechanical model for calculating tibia torsion based on measurements of torsion loading between the boot and ski. Previous control schemes have used leg displacement only to indicate tibia torsion. The contributions of both inertial and velocity-dependent torques to tibia loading are explored and it is shown that both these moments must be included in addition to displacement-dependent moments. A new analog controller design which includes inertia, damping, and stiffness terms in the tibia load calculation is also presented.

Copyright © 1980 by ASME
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