Data storage device employing adaptive feed-forward control in timing loop to compensate for vibration

摘要

A data storage device is disclosed comprising a head actuated over a disk and a vibration detector configured to generate a vibration signal in response to a vibration affecting the data storage device. A timing loop is configured to generate a disk-locked clock substantially synchronized to a rotation frequency of the disk. An adaptation control signal is generated based on the vibration signal and an error signal of the timing loop. An adaptive filter is adapted based on the adaptation control signal, wherein the adaptive filter filters the vibration signal to generate feed-forward compensation values. The feed-forward compensation values are applied to the timing loop to compensate for the vibration.

主权项

1. A data storage device comprising:
a disk; a head actuated over the disk; a vibration detector configured to generate a vibration signal in response to a vibration affecting the data storage device; and control circuitry comprising a timing loop configured to generate a disk-locked clock substantially synchronized to a rotation frequency of the disk, the control circuitry configured to:
generate an adaptation control signal based on the vibration signal and an error signal of the timing loop;adapt an adaptive filter based on the adaptation control signal, wherein the adaptive filter filters the vibration signal to generate feed-forward compensation values; andapply the feed-forward compensation values to the timing loop to compensate for the vibration.