Disk drive using timing loop control signal for vibration compensation in servo loop

摘要

A disk drive is disclosed comprising a timing loop configured to generate a clock synchronized to a rotation of a disk and a servo loop configured to control an actuator to actuate a head over the disk. A timing signal generated by the timing loop is filtered with a pre-compensation filter (PCF) comprising an inverse transfer function from a delta in a rotation velocity of the disk (Δω) due to a vibration affecting the disk drive to the timing signal, and the actuator is controlled to actuate the head over the disk based on an output of the PCF.

主权项

1. A disk drive comprising:
a disk; a head; an actuator; and control circuitry comprising a timing loop configured to generate a clock synchronized to a rotation of the disk and a servo loop configured to control the actuator to actuate the head over the disk, the control circuitry configured to:
filter a timing signal generated by the timing loop with a pre-compensation filter (PCF) comprising an inverse transfer function from a delta in a rotation velocity of the disk (Δω) due to a vibration affecting the disk drive to the timing signal; andcontrol the actuator to actuate the head over the disk based on an output of the PCF.