Head position control method, head position control device and disk device

摘要

In a head position control device having a disturbance suppression function and eccentricity correction function, the interference between the eccentricity correction function and the disturbance suppression function is prevented. An eccentricity correction function (102,110-1,...110-n) and disturbance suppression control function (104) are provided in the head positioning control system, and an interference prevention function (106,114), which detects the disturbance suppression frequency and turns OFF the feedback of the eccentricity correction control for the eccentricity correction frequency near the disturbance suppression frequency, or shifts the disturbance suppression frequency from the eccentricity correction frequency, is provided. Therefore the interference between the eccentricity correction and the disturbance suppression can be prevented, and unstable eccentricity correction can be prevented.