Patent ID: 6950274
Filing Date: 2005-09-27
Classification: G11B

Abstract:
1. A disk storage apparatus comprising: actuator for positioning a head with respect to a disk; drive for driving said actuator in accordance with an input drive signal; voltage detection for detecting a voltage induced in driving said actuator, and for outputting a voltage signal; disturbance estimation for estimating a magnitude of a disturbance exerted on said head from said drive signal and said voltage signal, and for producing a disturbance estimation signal; filter for cutting off a high frequency component of said disturbance estimation signal, and for outputting a filter signal; position detection for producing a position error signal corresponding to a current position of said head from servo information previously recorded on said disk and detected by said head, and for outputting the position error signal; position control for producing a position control signal corresponding to said position error signal, and for outputting the position control signal; and correction for combining said position control signal with said filter signal to produce said drive signal, and for outputting the drive signal.