System and method for three dimensional calibration of force plates

摘要

A method for calibrating a force platform includes, providing a force platform and applying an n×m grid on a top surface of the force platform via a computing device. Next, applying p known loads on each of the n×m grid points of the top surface along a Z-axis being perpendicular to the X and Y axes and along the X and Y axes. Next, taking multipoint measurements at each grid point and for each applied known load along the X, Y and Z axes and generating six measured output signals, exact position coordinates and applied known load magnitude for each grid point. Next, assembling an array of n×m×p of six equations with six unknown for each grid point and applied known load and then solving the assembled equations and deriving a position and load specific calibration matrix for each grid point.

主权项

1. A method for calibrating a force platform comprising:
providing a force platform and applying a grid of points on a top surface of the force platform via a computing device, wherein said top surface extends along an X-axis, and along a Y-axis of said force platform; applying p known loads on each of the grid points of the top surface along a Z-axis being perpendicular to said X and Y axes and along said X and Y axes; taking multipoint measurements at each grid point and for each applied known load along said X, Y and Z axes; generating six measured output signals, exact position coordinates and applied known load magnitude for each grid point; assembling an array of six equations with six unknowns for each grid point and applied known load; solving the assembled equations and deriving a position and load specific calibration matrix for each grid point and applied known load; and entering the derived position and load specific calibration matrices for all grid points in a calibration table and storing the calibration table in a non-volatile memory.