Written-in repeatable run-out correction for hard disk drives

Details Written-in repeatable run-out correction for hard disk drives Written-in repeatable run-out correction for hard disk drives

2006-11-22

2008-10-21

Nguyen, Hoa T (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07440223

ABSTRACT:
A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The circuit includes a repeatable run-out estimator in a feed forward control loop to control the movement of the head. The repeatable run-out estimator compensates for a constant bias torque disturbance in the drive.

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