Method and apparatus for estimating micro-actuator stroke sensitivity in a hard disk drive
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United States of America Patent
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Aug 18, 2009
Grant Date -
Jun 1, 2006
app pub date -
Jan 10, 2006
filing date -
Jul 6, 2004
priority date (Note) -
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Abstract
Method of estimating the stroke sensitivity of micro-actuator coupled with slider and its read-write head. Micro-actuator stimulus signal used to drive micro-actuator, inducing noise into lateral positioning of read-write head near track by voice coil motor to create PES. Lateral position noise derived from Position Error Signal. Stroke sensitivity estimated from lateral position noise and micro-actuator stimulus signal. Apparatus supporting method estimating stroke sensitivity: servo controller, embedded circuit including servo-controller, and hard disk drive may include servo-controller and/or embedded circuit. Method making servo-controller, embedded circuit, and/or hard disk drive. Servo-controller, embedded circuit, and hard disk drive are products of these processes.
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