Method and apparatus for rejecting contact-induced disturbances
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United States of America Patent
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Apr 17, 2007
Grant Date -
Aug 31, 2006
app pub date -
Feb 28, 2005
filing date -
Feb 28, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for compensating for head-to-disk contact-induced disturbances in a hard disk drive is disclosed. The method includes determining topographical variations across a surface of a disk during the manufacturing or operation of the hard disk drive. Error signal variations that occur as a result of head-to-disk contact-induced disturbances resulting from the topographical variations are recorded. Current to a voice coil motor in the hard disk drive is varied to correct for the contact-induced disturbances before they occur.
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