球スライダの静止磁気ディスク衝突時における接触剛性と接触減衰の同定(機械力学,計測,自動制御)

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This paper deals with experimental identification of the stiffness and damping in dynamic collision between a slider and a stationary magnetic disk. In experiments, the collision motion of a spherical slider on the disk surface is measured by LDV. We used an Al_2O_3TiC spherical slider with a radius of 1 mm and two kinds of magnetic disk whose substrate is Aluminum (AD and glass. The contact force and damping were identified so as to minimize root means square value of error between the experimental data and the analytical results of a single DOF slider motion calculated from the six different damping force models. As a result, we found that the contact force due to penetrating depth can be accurately estimated by Hertzian contact theory using the elastic parameters in the substrate. The damping coefficient is proportional to the real contact area and is different between in the penetrating and repulsing processes of the slider. The damping coefficient in repulsing process is more than two order larger that that in penetrating process in the Al disk. The damping of glass disk is almost zero.
社団法人日本機械学会の論文
2005-01-25