重心動揺計の精度向上の試み : 線形モデルを用いて

概要

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It is generally recognized that the gravicorder is less accurate when subjects are light. As the position of gravity center is calculated from a equilibrium among forces to supporting columns, the forces must be transformed to electrical signals. This process probably causes errors of measurement. In this paper, the relationship between given positions where a load was placed and calculated positions was mathematically analyzed first. The result showed that the given point can be presented by a linear model using calculated coordinates. Following this, weight ranging from 98 N to 321.4 N was placed on 4 different locations. Parameters corresponding to each weight were determined using a method of least squares. Then the calculated coordinates were corrected using these parameters. Finally, These correction algorithm made it possible to reduce the average absolute error from mm order to 1/10 mm order.
社団法人日本機械学会の論文
1991-11-25