Harmonic selection for track following on a hard disk drive

Details Harmonic selection for track following on a hard disk drive Harmonic selection for track following on a hard disk drive

2009-04-24

2011-11-29

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S075000

Reexamination Certificate

active

08068298

ABSTRACT:
Harmonic selection for track following is described for a hard disk drive comprising at least one magnetic disk capable of storing data and spinning, a controller capable of controlling a read/write head capable of reading and writing data while following a track on a surface of the at least one magnetic disk, and a memory device capable of storing data relating to the operation of the hard disk drive. A drive function test on the hard disk drive is performed, during which harmonic frequencies are identified which cause disturbances for the hard disk drive. Data regarding the harmonic frequencies which cause the greatest disturbances for the hard disk drive is stored in the memory device. The data regarding the harmonic frequencies which cause the greatest disturbances is forwarded to the controller upon the at least one magnetic disk spinning.

REFERENCES:
patent: 5608586 (1997-03-01), Sri-Jayantha et al.
patent: 5930067 (1999-07-01), Andrews et al.
patent: 5949605 (1999-09-01), Lee et al.
patent: 6310742 (2001-10-01), Nazarian et al.
patent: 6347017 (2002-02-01), Carlson
patent: 6549349 (2003-04-01), Sri-Jayantha et al.
patent: 6804079 (2004-10-01), Hsin
patent: 6819521 (2004-11-01), Ho et al.
patent: 6867943 (2005-03-01), Harmer et al.
patent: 6937424 (2005-08-01), Chang et al.
patent: 6947249 (2005-09-01), Hargarten et al.
patent: 6963466 (2005-11-01), Baum et al.
patent: 6999267 (2006-02-01), Melkote et al.
patent: 7088547 (2006-08-01), Wang et al.
patent: 7193808 (2007-03-01), Takaishi
patent: 7330332 (2008-02-01), Baek et al.
patent: 7345842 (2008-03-01), Chang et al.
patent: 7372659 (2008-05-01), Takaishi
patent: 7738211 (2010-06-01), Oyamada et al.
patent: 2003/0133220 (2003-07-01), Hsin
Onuki, et al., “Compensation for Repeatable Tracking Errors in Hard Drives Using Discrete-Time Repetitive Controllers”,IEEE/ASME Transactions on Mechatronics, vol. 6, No. 2, (Jun. 2001),132-136.
Wu, et al., “Repeatable Runout Compensation for Hard Disk Drives Using Adaptive Feedforward Cancellation”,American Control Conference, (Jun. 2006),14-16.
Zhang, et al., “A Novel Adaptive Feedforward Compensation Algorithm for Hard Disk Drive”,IEEE International Conference on Mechatronics and Automation, (Jun. 2006),1275-1279.

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