| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk device being inexpensive and having high track density in which deviation of tracking of a head caused by the eccentricity of a disk can be suppressed. SOLUTION: This disk device is constituted so that a position detecting means 10 generates an error signal (e) corresponding to the position of a head 2 from servo information of a disk, a position control means 11 generates a control signal (c) corresponding to an error signal (e), a disturbance estimating means 14 forms a disturbance estimating signal Fd indicating magnitude of position disturbance from a drive signal (u) inputted to a drive circuit 12 driving an actuator means 7 and the error signal (e) and output it to a compensating means 15, and the drive signal (u) is compensated from a compensating signalβformed by the compensating means 15 and the control signal (c) formed by the position control means 11.
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