Integrating the feedforward compensation method and a magnetic head positioning control device of the positioning servomechanism

摘要

PROBLEM TO BE SOLVED: To extremely reduce the speed deviation of a head speed signal at the time of deceleration and to prevent the generation of a transient response when feedforward compensation expires to attain quick and highly accurate positioning in a positioning servo mechanism. ;SOLUTION: In a speed control type head positioning mechanism for a magnetic disk device, a difference between a head speed signal 16 and an object speed signal 118 is integrated from a deceleration start point, the integrated value is multiplied by proper gain and the gain-multiplied value is inputted to a driving amplifier 108 as a feedforward input value 120. The feedforward input value 120 proportional to the signal 116 is inputted to the amplifier 108 in the vicinity of an object position so that the input value 120 is smoothly converged upon '0' at the object position.;COPYRIGHT: (C)1997,JPO