Force platforms (FPs) are routinely used in human movement analysis. Over time, the instrument sensitivity may change and cause undesired crosstalk between the output variables, leading to a lack of accuracy [1]. Further, a nonlinear behaviour can be present, mainly due to the bending under load of the FP top plate [2]. We propose here a system that re-calibrates the FP and, at the same time, quantifies and compensates for the force platform non-linearity. The system was experimentally tested on 4 commercial FPs, and its effectiveness was verified by quantifying the FPs accuracy in the COP measurement, before and after re-calibration.
Portable system for the linear and non-linear re-calibration of force platform / A.Cedraro; F. Bagalà; L. Chiari; A. Cappello. - STAMPA. - (2009), pp. 51-52. (Intervento presentato al convegno XIX Conference of the International Society for Posture and Gait Research (ISPGR) tenutosi a Bologna nel 21-25 Giugno 2009).
Portable system for the linear and non-linear re-calibration of force platform
CEDRARO, ANDREA;BAGALA', FABIO;CHIARI, LORENZO;CAPPELLO, ANGELO
2009
Abstract
Force platforms (FPs) are routinely used in human movement analysis. Over time, the instrument sensitivity may change and cause undesired crosstalk between the output variables, leading to a lack of accuracy [1]. Further, a nonlinear behaviour can be present, mainly due to the bending under load of the FP top plate [2]. We propose here a system that re-calibrates the FP and, at the same time, quantifies and compensates for the force platform non-linearity. The system was experimentally tested on 4 commercial FPs, and its effectiveness was verified by quantifying the FPs accuracy in the COP measurement, before and after re-calibration.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.