An efficient method for numerical simulation of tape floating behavior in VTR has been developed. Parameter survey examples for tape floating height control in some drum-guide tape systems have been shown. The spacing between a drum and a tape is one of the most important topics regarding the tape/head interface problem for a VTR. The spacing is caused by air film lubrication and can be determined by using the Reynolds equation for air and the elastic equation for a tape. Each equation is discretized, using the finite element method, and solved by the Newton-Raphson method. The results, calculated by the present method, show good agreement with experimental results. The authors also investigated tape floating behavior for several drum-guide tape systems, which are intended to decrease tape/drum spacing, especially in the head entrance region, as follows; (1) Guidepost twist effect; (2) Difference between a rotary drum configuration and a rotary center drum configuration; (3) A new groove location for tape floating height equalization.

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