Abstract
Balance modeling during standing is an important issue in the medical field and the vehicle development. There have been a number of reports based on impulse response and frequency response. However, very little studies have been achieved to identify personal parameters. It is very difficult to reproduce the experimental results and to identify a stable system. This study focused on the balance modeling on sagittal plane from a frequency response diagram with support surface sway. To identify personal control parameters from the response of the center of mass (COM), we assumed a mechanical model and an internal feedback system composed of the state feedback control with time delay and a target posture control according to the velocity of the support surface. In addition, we proposed a COM estimation method from measurement of a force plate. We found that the present method identified personal parameters which were almost same as the parameters from the motion capture measurement.
