| 摘要 |
A system and method for compensation for variation in a voice coil motor's torque factor due to changes in temperature to improve the seek performance of a disk drive. The method uses the numerical relationship between change in torque factor and change in temperature (G) for the voice coil motor, combined with torque factor KT and temperature at/near the voice coil motor measured at a first time (for example during the initial start-up of the disk drive during the automatic recalibrations that is performed during a start-up, (KT RECAL) and (TRECAL) respectively). These KRECAL and TRECAL can be stored in memory. At some later predetermined interval or event, the temperature at or near the voice coil motor is again measured (TEVENT). From these known temperature and torque factor parameters, in combination with the known relationship between temperature and torque factor for the voice coil motor, the KT at the future time/event (KT EVENT) can be calculated. This new KT EVENT has been adjusted for temperature and can now be used in the seek algorithm in place of the original KT RECAL which results in more optimal seek performance.
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