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    • 3. 发明申请
    • REAL TIME CLOSE LOOP FLY HEIGHT CONTROL
    • 实时关闭环路飞行高度控制
    • US20140055882A1
    • 2014-02-27
    • US13593682
    • 2012-08-24
    • Ming JinFan ZhangHaitao XiaWu Chang
    • Ming JinFan ZhangHaitao XiaWu Chang
    • G11B21/02
    • G11B5/6029G11B5/607
    • A device includes a disk drive assembly configured to store information using a platter comprising a magnetic material surface and a magnetic head disposed above the magnetic material surface. The magnetic head is configured to move across tracks formed on the platter to write information to the magnetic material surface and read information from the magnetic material surface. The device also includes a controller operatively coupled with the disk drive assembly. The controller is configured to dynamically adjust the height of the magnetic head above the magnetic material surface at each of the tracks by determining a harmonic ratio for a particular track and comparing the harmonic ratio to a reference harmonic ratio for the track. For example, the controller calculates a difference between the harmonic ratio and the reference harmonic ratio.
    • 一种设备包括:盘驱动器组件,其配置为使用包括磁性材料表面的盘片和设置在磁性材料表面上方的磁头来存储信息。 磁头构造成在形成在盘片上的轨道上移动以向磁性材料表面写入信息并从磁性材料表面读取信息。 该装置还包括与盘驱动器组件可操作地耦合的控制器。 控制器被配置为通过确定特定轨道的谐波比并将谐波比与轨道的基准谐波比进行比较来动态地调整磁道材料表面在每个轨道上方的高度。 例如,控制器计算谐波比和基准谐波比的差。