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Dynamic force measurements for a high bar using 3D motion capturing
1Human Performance Research Graz, University of Graz, Max-Mell-Allee 11, 8010 Graz, Austria. claus.cagran@uni-graz.at
Journal of Biomechanics
|November 13, 2009
Summary
This study calibrates a horizontal bar to measure forces in artistic gymnastics. The method uses bar displacement and Euler-Bernoulli beam theory for accurate force measurement during dynamic performances.
Area of Science:
- Sports Engineering
- Biomechanics
- Physics
Background:
- Accurate force measurement is crucial for analyzing dynamic performances in artistic gymnastics.
- Existing methods may not fully account for complex forces during dynamic movements.
Purpose of the Study:
- To develop and validate a method for measuring forces acting on a horizontal bar during dynamic gymnastics.
- To utilize bar displacement and established physics principles for force quantification.
Main Methods:
- Calibrating a horizontal bar by applying known forces and measuring displacement using a Vicon motion capturing system.
- Fitting calibration data to the Euler-Bernoulli beam theory.
- Incorporating bar inertia and non-central force application into the model.
Main Results:
- A calibration parameter was determined, allowing direct force calculation from bar displacement.
- The method successfully accounts for inertia and two-handed force application.
- Uncertainties in force measurement were quantified as +/-25 N plus 1% of weight distribution.
Conclusions:
- The developed method provides a straightforward and accurate way to measure forces in artistic gymnastics.
- This technique enhances the analysis of dynamic performances and athlete-gymnastics interactions.
- The approach offers improved understanding of forces in sports involving dynamic bar interactions.
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