Implementation of the three degrees-of-freedom parallel platform in human posture analysis

The purpose of this study was to implement a three degrees-of-freedom inclining parallel platform to provide postural perturbations for examining human balance during the standing posture. The inclining parallel platform was capable of generating random rotation disturbances in sixteen different directions. By measuring the projection of the subject's centre of mass with a force plate mounted on top of the parallel platform, we had the ability to control the parallel platform rotation in a real time.