Force-Plate Issues
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The ground reaction force is an important external force which constantly affects the human motion. Force-plates are commonly used in measuring the ground reaction force. This section contains pages pertaining to the ground reaction force and force-plates such as:

Ground Reaction Force
Reaction-Oriented Coordinate System
Center of Pressure (CP)
Plate Padding
Calibration Matrix
Multiple Plates

One of the important issues in ground reaction analysis is the coordinate system. Most plate manufacturers use the so-called action-oriented system while the reaction-oriented system is used in the motion analysis. The equations developed in this section use the reaction-oriented system. See Reaction-Oriented Coordinate System for the details about these coordinate systems. Thus, one has to pay attention to the differences in the coordinate systems when comparing the equations with those obtained from the plate manuals.


Young-Hoo Kwon, 1998-