Active control system and method for reducing disk fluttering induced track misregistrations
    3.
    发明授权
    Active control system and method for reducing disk fluttering induced track misregistrations 失效
    主动控制系统和减少磁盘抖动的方法引起轨迹重合

    公开(公告)号:US06888694B2

    公开(公告)日:2005-05-03

    申请号:US10162507

    申请日:2002-06-04

    CPC分类号: G11B5/5526 G11B21/106

    摘要: The present invention relates to controlling an actuator for positioning a read/write head in storage devices such as disk drives. More specifically, the invention relates to using a sensor to detect the disk vibration amplitude perpendicular to the disk surface, and using feed forward control to cancel or counteract the tendency of the read/write head to deviate off-track due to disk vibration. Various approaches are proposed to detect the disk vertical vibration.

    摘要翻译: 本发明涉及控制用于将读/写头定位在诸如磁盘驱动器的存储装置中的致动器。 更具体地,本发明涉及使用传感器来检测垂直于盘表面的盘振动振幅,并且使用前馈控制来消除或抵消由于盘振动而使读/写头偏离偏离轨迹的趋势。 提出了各种方法来检测磁盘垂直振动。

    Detection of track misregistration within user data channel
    4.
    发明申请
    Detection of track misregistration within user data channel 失效
    检测用户数据通道内的跟踪重合失调

    公开(公告)号:US20050007690A1

    公开(公告)日:2005-01-13

    申请号:US10888493

    申请日:2004-07-09

    IPC分类号: G11B5/596

    CPC分类号: G11B5/59655

    摘要: A method for computing position error signal information of a transducer in a data storage system provides for different readback signals between adjacent tracks. The method involves a computation to obtain coarse position information from the servo bursts signals for track seeking and a computation to obtain a position indicator from the user data sector for more precise track following within the user data sector.

    摘要翻译: 用于计算数据存储系统中的换能器的位置误差信号信息的方法提供相邻轨道之间的不同回读信号。 该方法涉及一种计算,以从用于跟踪寻找的伺服突发信号中获得粗略位置信息,并进行计算以从用户数据扇区获得位置指示符,以便在用户数据扇区内更精确地跟踪跟踪。

    Detection of track misregistration within user data channel
    5.
    发明授权
    Detection of track misregistration within user data channel 失效
    检测用户数据通道内的跟踪重合失调

    公开(公告)号:US07009805B2

    公开(公告)日:2006-03-07

    申请号:US10888493

    申请日:2004-07-09

    IPC分类号: G11B5/596

    CPC分类号: G11B5/59655

    摘要: A method for computing position error signal information of a transducer in a data storage system provides for different readback signals between adjacent tracks. The method involves a computation to obtain coarse position information from the servo bursts signals for track seeking and a computation to obtain a position indicator from the user data sector for more precise track following within the user data sector.

    摘要翻译: 用于计算数据存储系统中的换能器的位置误差信号信息的方法提供相邻轨道之间的不同回读信号。 该方法涉及一种计算,以从用于跟踪寻找的伺服突发信号中获得粗略位置信息,并进行计算以从用户数据扇区获得位置指示符,以便在用户数据扇区内更精确地跟踪跟踪。

    Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement
    6.
    发明授权
    Disk drive employing radially coherent reference pattern for servo burst demodulation and fly height measurement 有权
    采用径向相干参考图形进行伺服脉冲串解调和飞行高度测量的磁盘驱动器

    公开(公告)号:US08824081B1

    公开(公告)日:2014-09-02

    申请号:US13418966

    申请日:2012-03-13

    申请人: Guoxiao Guo Jie Yu

    发明人: Guoxiao Guo Jie Yu

    IPC分类号: G11B5/02

    摘要: A disk drive is disclosed comprising a disk comprising a plurality of data tracks defined by servo sectors. Each servo sector comprises a periodic preamble recorded at a first frequency, servo data, a periodic reference pattern recorded at a second frequency different from the first frequency, and at least one servo burst. A servo sector is processed by processing the periodic preamble to extract the servo data, demodulating the servo burst in response to the periodic reference pattern, generating a position error signal based on the extracted servo data and the demodulated servo burst, and measuring a fly height of the head based on the periodic reference pattern.

    摘要翻译: 公开了一种磁盘驱动器,其包括由伺服扇区限定的多个数据磁道的磁盘。 每个伺服扇区包括以第一频率记录的周期性前导码,伺服数据,以与第一频率不同的第二频率记录的周期性参考模式和至少一个伺服脉冲串。 通过处理周期性前同步码处理伺服扇区以提取伺服数据,响应于周期性参考模式解调伺服脉冲,根据所提取的伺服数据和解调的伺服脉冲产生位置误差信号,并测量飞行高度 的头部基于周期性参考图案。

    Disk drive employing overlapping servo zones to facilitate servo zone crossing
    7.
    发明授权
    Disk drive employing overlapping servo zones to facilitate servo zone crossing 有权
    磁盘驱动器采用重叠伺服区,方便伺服区穿越

    公开(公告)号:US08724245B1

    公开(公告)日:2014-05-13

    申请号:US13529861

    申请日:2012-06-21

    IPC分类号: G11B5/09

    摘要: A disk drive is disclosed comprising a head actuated over a disk, the disk comprising a plurality of servo sectors defining a plurality of servo tracks, wherein the servo tracks form a plurality of servo zones. A servo data rate of servo sectors in a first servo zone is different than a servo data rate of servo sectors in a second servo zone. A boundary of a first servo zone overlaps with a boundary of a second servo zone over a transition zone. The servo sectors of the first servo zone are interleaved with the servo sectors of the second servo zone within the transition zone. At least one servo parameter is adjusted when the head is over the transition zone in order to transition between the first servo zone and the second servo zone.

    摘要翻译: 公开了一种磁盘驱动器,其包括在盘上致动的磁头,盘包括限定多个伺服磁道的多个伺服扇区,其中伺服磁道形成多个伺服区。 第一伺服区域中的伺服扇区的伺服数据速率与第二伺服区域中的伺服扇区的伺服数据速率不同。 第一伺服区的边界与过渡区上的第二伺服区的边界重叠。 第一伺服区的伺服扇区与过渡区内的第二伺服区的伺服扇区交错。 当头部在过渡区域上时,至少调整一个伺服参数,以便在第一个伺服区域和第二个伺服区域之间转换。

    Disk drive estimating reader/writer gap across servo zones
    8.
    发明授权
    Disk drive estimating reader/writer gap across servo zones 失效
    磁盘驱动器估计读写器与伺服区之间的差距

    公开(公告)号:US08576506B1

    公开(公告)日:2013-11-05

    申请号:US13529817

    申请日:2012-06-21

    IPC分类号: G11B5/09

    CPC分类号: G11B5/59688 G11B5/59616

    摘要: A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones. A disk locked clock is synchronized relative to a servo data rate of the servo zone the head is over. A first reader/writer gap is measured in cycles of the disk locked clock at a first servo track in the first servo zone. A second reader/writer gap is measured in cycles of the disk locked clock at a second servo track in the second servo zone. The first and second reader/writer gaps are normalized to generate a normalized first and second reader/writer gaps. A third reader/writer gap is estimated in cycles of the disk locked clock at a third servo track in the second servo zone based on the normalized first and second reader/writer gaps.

    摘要翻译: 公开了一种磁盘驱动器,其包括在盘上致动的磁头,该磁头包括限定多个伺服磁道的多个伺服扇区。 伺服轨道形成多个伺服区。 磁盘锁定时钟相对于磁头结束的伺服区域的伺服数据速率同步。 第一读取器/写入器间隙以第一伺服区中的第一伺服磁道的盘锁定时钟的周期进行测量。 第二读取器/写入器间隙以第二伺服区中的第二伺服磁道的盘锁定时钟的周期进行测量。 第一和第二读/写器间隙被归一化以产生归一化的第一和第二读/写器间隙。 基于归一化的第一和第二读取器/写入器间隙,以第二伺服区中的第三伺服轨道的盘锁定时钟的周期估计第三读取器/写入器间隙。

    Disk drive adjusting servo burst signals to compensate for radial velocity of the head
    9.
    发明授权
    Disk drive adjusting servo burst signals to compensate for radial velocity of the head 失效
    磁盘驱动器调整伺服突发信号以补偿磁头的径向速度

    公开(公告)号:US08531798B1

    公开(公告)日:2013-09-10

    申请号:US12966474

    申请日:2010-12-13

    IPC分类号: G11B5/596

    CPC分类号: G11B5/5547 G11B5/59627

    摘要: A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors that define a plurality of servo tracks, wherein the servo sectors comprise a plurality of servo bursts. A radial velocity of the head is detected relative to the servo tracks. At least two of the servo bursts are read to generate servo burst signals, and the servo burst signals are adjusted in response to the radial velocity of the head. A position error signal is generated for the head in response to the adjusted servo burst signals.

    摘要翻译: 公开了一种磁盘驱动器,其包括在盘上致动的磁头,该磁头包括限定多个伺服磁道的多个伺服扇区,其中所述伺服扇区包括多个伺服脉冲串。 相对于伺服磁道检测磁头的径向速度。 读取至少两个伺服脉冲串以产生伺服脉冲串信号,并且响应于磁头的径向速度来调节伺服脉冲串信号。 响应于调整后的伺服脉冲串信号,针对磁头产生位置误差信号。

    Disk drive writing wedge RRO values in a butterfly pattern
    10.
    发明授权
    Disk drive writing wedge RRO values in a butterfly pattern 失效
    磁盘驱动器写入楔形RRO值为蝴蝶图案

    公开(公告)号:US07576941B1

    公开(公告)日:2009-08-18

    申请号:US11924830

    申请日:2007-10-26

    IPC分类号: G11B5/596

    CPC分类号: G11B5/59627

    摘要: A disk drive is disclosed comprising a plurality of servo sectors that define a plurality of tracks, and a head comprising a read element radially offset from a write element. The read element is positioned over a first track, and the first track is read to generate first read wedge repeatable runout (WRRO) values. A first seek operation of the head positions the read element over a second track, and the second track is read to generate first write WRRO values. The first write WRRO values are used to write the first read WRRO values to the first track. A second seek operation of the head positions the read element over a third track, and the third track is read to generate second write WRRO values. The second write WRRO values are used to write the first write WRRO values to the second track.

    摘要翻译: 公开了一种磁盘驱动器,其包括限定多个磁道的多个伺服扇区,以及包括从写入元件径向偏移的读取元件的磁头。 读取元件位于第一轨道上,并且读取第一轨迹以产生第一读取楔形可重复跳动(WRRO)值。 头部的第一寻找操作将读取的元素定位在第二个轨道上,并且读取第二个轨迹以产生第一个写入WRRO值。 第一次写入WRRO值用于将第一个读取的WRRO值写入第一个轨道。 磁头的第二次搜索操作将读取元件定位在第三磁道上,并且读取第三磁道以产生第二写WRRO值。 第二次写入WRRO值用于将第一个写WRRO值写入第二个轨道。