Host: The Japan Society of Mechanical Engineers
Name : The 15th International Conference on Motion and Vibration(MoViC 2020)
Date : September 09, 2020 - September 11, 2020
Accurate assessment of the balance during standing is one of the important issues for the prevention of falls and detection of diseases. Although there are a lot of methods for assessing balance, this study aims to obtain a model of individual balance by system identification based on the white box modeling. The target for the assessment is a steady balance response to horizontal oscillation of the support surface on sagittal plane. There are two problems to achieve the identification. The first problem is to define a simple model reproducing the response. In order to reproduce the response below 0.2Hz, we introduced a cascade control system and defined the reference displacement of the center of mass of the body according to velocity of the support surface as the outer-loop system. The second problem is to simplify the measurement of the center of mass of the body for practical use. We proposed a method for estimating the center of mass of the body from force plate measurements, and verified its accuracy by comparing it with the measurements of the three-dimensional motion analysis system. As a result of experiments with three subject, we found that the parameter identification of the proposed model can be achieved based on the force plate measurements.
