IDENTIFICATION OF THE KNEE JOINT IN VARUS-VALGUS AND LONGITUDINAL ROTATIONS IN LABORATORY AND SNOW SKIING EXPERIMENTS.

Chen-Yuan Kuo, C. D. Mote

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The relationships between rotations across the knee joint in the varus-valgus and longitudinal directions and the externally applied moments at the foot are investigated in laboratory and in skiing field tests. Auto regressive moving average exogenous (ARMAX) models of rotation across the knee resulting from moments applied to the foot are constructed using methods of system identification. The predictions of rotations by ARMAX models are compared with measurements. The ARMAX models identified from moment-rotation data recorded in quasi-static laboratory tests are highly dissipative for varus-valgus and for longitudinal rotations. Models identified using the field data show components of vibration of the instrumentation on the test subject in addition to the rotation component. Predictions of rotation across the knee by models obtained from field test data compare favorably to those predicted with models obtained from the laboratory test data.

Original languageEnglish (US)
Title of host publicationASTM Special Technical Publication
EditorsC.D.Jr Mote, Robert J. Johnson
PublisherASTM
Pages5-26
Number of pages22
ISBN (Print)0803109369
StatePublished - Dec 1 1987

Publication series

NameASTM Special Technical Publication
ISSN (Print)0066-0558

ASJC Scopus subject areas

  • Engineering(all)

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