| 摘要 |
A method of determining change in actuator position includes determining a slope of the inductor current with time and determining whether the slope exceeds a first predetermined slope for a first predetermined time, determining whether the slope is less than a second predetermined slope for a second predetermined time when the slope exceeds the first predetermined slope for the first predetermined time, and determining whether the slope exceeds a third predetermined slope for a third predetermined time when the slope is less than the second predetermined slope for the second predetermined time. The method further includes determining the change in actuator position when the slope exceeds the third predetermined slope for the third predetermined time.
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