Disk drive selecting disturbance signal for feed-forward compensation
First Claim
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1. A disk drive comprising:
- a disk;
a head; and
control circuitry comprising a servo control system operable to actuate the head over the disk, the control circuitry operable to;
generate a plurality of disturbance signals in response to a vibration;
generate a plurality of correlations in response to each disturbance signal and an error signal of the servo control system;
select at least one of the disturbance signals in response to the correlations;
generate a feed-forward compensation value in response to the selected disturbance signal; and
apply the feed-forward compensation value to the servo control system to compensate for the vibration.
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Abstract
A disk drive is disclosed comprising a disk, a head, and control circuitry comprising a servo control system operable to actuate the head over the disk. A plurality of disturbance signals is generated in response to a vibration. A plurality of correlations is generated in response to each disturbance signal and an error signal of the servo control system. At least one of the disturbance signals is selected in response to the correlations. A feed-forward compensation value is generated in response to the selected disturbance signal, and the feed-forward compensation value is applied to the servo control system to compensate for the vibration.
149 Citations
22 Claims
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1. A disk drive comprising:
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a disk; a head; and control circuitry comprising a servo control system operable to actuate the head over the disk, the control circuitry operable to; generate a plurality of disturbance signals in response to a vibration; generate a plurality of correlations in response to each disturbance signal and an error signal of the servo control system; select at least one of the disturbance signals in response to the correlations; generate a feed-forward compensation value in response to the selected disturbance signal; and apply the feed-forward compensation value to the servo control system to compensate for the vibration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a disk drive comprising a disk, a head, and a servo control system operable to actuate the head over the disk, the method comprising:
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generating a plurality of disturbance signals in response to a vibration; generating a plurality of correlations in response to each disturbance signal and an error signal of the servo control system; selecting at least one of the disturbance signals in response to the correlations; generating a feed-forward compensation value in response to the selected disturbance signal; and applying the feed-forward compensation value to the servo control system to compensate for the vibration. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification