New Method to Evaluate Unknown Parameters in a Nonlinear Partial Differential Equation with Some Constraints. 2nd Report, Application for the Evaluation of the Ultra-Thin Air Film Spacing between Head Sliders and Disk Surfaces on Magnetic Disk Files.

Abstract

This paper describes a method to evaluate an equilibrium thin, air film space between head sliders and rotating disks on megnetic disk files. The exact evaluation of the ultra thin air-film equilibrium is very important for the design of a floating head slider. The space of the slider is supported by hydrodynamic pressure and it has a strong nonlinearity. The equilibrium space is related to the woking load of the slider and rotating disk speed. When slider shapes are complicated, or when the slider is running with a yaw angle, or when running speed differences of the slider need to be considered further, an exact evaluation of space is very difficult. The method used in this study gives successfull evaluations for these cases. The method uses less time for one iteration cycle and less iterations than the conventional method.