回転ヘッド磁気記録装置におけるテープ浮上特性解析

概要

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A computational method for analyzing the spacing between a tape and the video-head of a rotary head recording device, such as VTR, R-DAT etc., is described. This kind of study has been carried out, so far, without considering the direct contact of the tape and the head. We can, however, observe that the head wears as it moves with the tape. It follows that the contact of these materials should be take into account. We introduce a mathematical model of this contact which is obtained in consideration of the roughness of the material surfaces. It is of particular interest that this model is effective to analyze the spacing and the pressure when the spacing might become narrower than the material surface roughness. The calculation results show a good agreement with the experimental data, and it is concluded that the contact model is useful and accurate.
1988-08-25