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    Disk-flutter servo control in rotating storage system with optimum disk thickness
    5.
    发明授权
    Disk-flutter servo control in rotating storage system with optimum disk thickness 有权
    旋转存储系统中的磁盘颤动伺服控制，磁盘厚度最佳

    公开(公告)号：US06339512B1

    公开(公告)日：2002-01-15

    申请号：US09276211

    申请日：1999-03-25

    申请人： S. M. Sri-Jayantha ,  Hien Dang ,  Arun Sharma ,  Kiyoshi Satoh ,  Tetsuo Ueda ,  Hideki Ohzeki ,  Nayouki Kagami ,  Kiochi Takeuchi

    发明人： S. M. Sri-Jayantha ,  Hien Dang ,  Arun Sharma ,  Kiyoshi Satoh ,  Tetsuo Ueda ,  Hideki Ohzeki ,  Nayouki Kagami ,  Kiochi Takeuchi

    IPC分类号： G11B5596

    CPC分类号： G11B5/6005 ,  G11B5/59627 ,  G11B21/21

    摘要： A hard disk has a servo loop and a rotating storage medium. The rotating storage medium has one or more significant flutter modes at frequencies below a zero cross frequency of a rejection transfer function of the servo loop. The effect of the forgoing is to allow the servo loop to better track a rotating medium that is subject to significant flutter. Peak filters with frequency bands that substantially overlap frequency bands of the significant flutter modes can also be added to the servo loop to further improve tracking. Multiple narrow band filters with frequency bands overlap can be used to cover the spectrum of a single flutter mode. Two lag-lead filters, the frequency responses of which overlap can be used to cover two adjacent significant flutter modes. At frequencies intermediate to the two adjacent flutter, modes, the lead caused by one filter, will be cancelled by the lag caused by the second.

    摘要翻译： 硬盘具有伺服回路和旋转存储介质。 旋转存储介质在低于伺服环路的拒绝传递函数的零交叉频率的频率下具有一个或多个显着颤振模式。 上述的效果是允许伺服回路更好地跟踪受到显着颤动的旋转介质。 具有基本上与重要抖动模式的频带重叠的频带的峰值滤波器也可以被添加到伺服环路中以进一步改善跟踪。 具有频带重叠的多个窄带滤波器可以用于覆盖单个颤振模式的频谱。 两个滞后引线滤波器，其重叠的频率响应可用于覆盖两个相邻的显着颤振模式。 在两个相邻颤振之间的频率中，模式，由一个滤波器引起的引线将被第二个引起的滞后所抵消。

    Servo system for disk-flutter in rotating storage systems
    6.
    发明授权
    Servo system for disk-flutter in rotating storage systems 有权
    用于旋转存储系统中的磁盘驱动的伺服系统

    公开(公告)号：US06487028B1

    公开(公告)日：2002-11-26

    申请号：US09275952

    申请日：1999-03-25

    申请人： S. M. Sri-Jayantha ,  Hien Dang ,  Arun Sharma ,  Kiyoshi Satoh ,  Tetsuo Ueda ,  Hideki Ohzeki ,  Nayouki Kagami ,  Kiochi Takeuchi

    发明人： S. M. Sri-Jayantha ,  Hien Dang ,  Arun Sharma ,  Kiyoshi Satoh ,  Tetsuo Ueda ,  Hideki Ohzeki ,  Nayouki Kagami ,  Kiochi Takeuchi

    IPC分类号： G11B502

    CPC分类号： G11B5/59633

    摘要： In order to handle platter flutter in a hard disk operated at high speed (e.g. 10,000 RPM) and maintain tracking of read/write head, peak filters are added to a head tracking servo feedback loop. In some embodiments, several lag-lead type peak filters centered at a plurality of flutter mode frequencies are provided to process a Position Error Signal (PES) read from the read/write head. The several filter are preferably arranged in series (i.e. to operate on the PES sequentially), alternatively the filters can be arranged in parallel. Phase lags and leads caused by the several filters partially cancel at frequencies intermediate center frequencies of the several filters. According to another embodiment two or more, preferably three narrow band filters are used to cover the spectrum of each flutter mode. In a configuration mode, a spectrum of the flutter modes can be obtained and used to set the center frequencies, and bandwidths of filters used to filter out the flutter modes.

    摘要翻译： 为了处理以高速（例如10,000RPM）运行的硬盘中的盘片颤动并且保持对读/写头的跟踪，峰值滤波器被添加到磁头跟踪伺服反馈回路中。 在一些实施例中，提供以多个颤振模式频率为中心的几个滞后引线型峰值滤波器来处理从读/写头读取的位置误差信号（PES）。 多个滤波器优选地串联布置（即，顺序地在PES上操作），或者滤波器可以并联布置。 由几个滤波器引起的相位滞后和引线在几个滤波器的中间中心频率处部分地消除。 根据另一个实施例，两个或更多个，优选地三个窄带滤波器用于覆盖每个颤振模式的频谱。 在配置模式下，可以获得颤振模式的频谱，并用于设置中心频率，以及用于滤除颤振模式的滤波器的带宽。

    Magnetic disk drive and method for seek operations with reduced noise
    7.
    发明授权
    Magnetic disk drive and method for seek operations with reduced noise 有权
    磁盘驱动器和噪声减小的寻道操作方法

    公开(公告)号：US07271976B2

    公开(公告)日：2007-09-18

    申请号：US11265004

    申请日：2005-11-01

    申请人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    发明人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    IPC分类号： G11B21/02

    CPC分类号： G11B5/5547

    摘要： Embodiments of the invention reduce the noise occurring when the lubricating layer on the magnetic disk is smoothed. In one embodiment, a magnetic disk drive has a read/write mode parameter table for generating an electric current to be supplied to a voice coil motor when the magnetic head performs data read/write operations on the magnetic disk. The magnetic disk drive also has a smoothing mode parameter table for generating another electric current to be supplied to the voice coil motor when neither a data read nor a write operation is performed on the magnetic disk. The CPU refers to either the read/write mode parameter table or the smoothing mode parameter table and controls the electric current to be supplied to the voice coil motor. When a lubricating-layer smoothing event occurs, the CPU refers to the smoothing mode parameter table and after generating the associated electric current to be supplied to the voice coil motor, moves the magnetic head to seek between the outermost and innermost tracks on the surface of the magnetic disk to perform a smoothing process for the lubricating layer.

    摘要翻译： 本发明的实施例减少了当磁盘上的润滑层平滑时产生的噪声。 在一个实施例中，当磁头对磁盘执行数据读/写操作时，磁盘驱动器具有用于产生要提供给音圈电机的电流的读/写模式参数表。 磁盘驱动器还具有平滑模式参数表，用于当不对磁盘执行数据读取或写入操作时，产生要提供给音圈电机的另一电流。 CPU指的是读/写模式参数表或平滑模式参数表，并控制提供给音圈电机的电流。 当发生润滑层平滑事件时，CPU参考平滑模式参数表，并且在产生要提供给音圈电机的相关联的电流之后，移动磁头以在表面上的最外侧和最内侧的轨道之间寻找 该磁盘对润滑层进行平滑处理。

    Magnetic disk drive and method for executing seek operation
    8.
    发明申请
    Magnetic disk drive and method for executing seek operation 有权
    磁盘驱动器和执行寻道操作的方法

    公开(公告)号：US20060092549A1

    公开(公告)日：2006-05-04

    申请号：US11265004

    申请日：2005-11-01

    申请人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    发明人： Satoshi Ishii ,  Tetsuo Ueda ,  Isao Yoneda

    IPC分类号： G11B21/02

    CPC分类号： G11B5/5547

    摘要： Embodiments of the invention reduce the noise occurring when the lubricating layer on the magnetic disk is smoothed. In one embodiment, a magnetic disk drive has a read/write mode parameter table for generating an electric current to be supplied to a voice coil motor when the magnetic head performs data read/write operations on the magnetic disk. The magnetic disk drive also has a smoothing mode parameter table for generating another electric current to be supplied to the voice coil motor when neither a data read nor a write operation is performed on the magnetic disk. The CPU refers to either the read/write mode parameter table or the smoothing mode parameter table and controls the electric current to be supplied to the voice coil motor. When a lubricating-layer smoothing event occurs, the CPU refers to the smoothing mode parameter table and after generating the associated electric current to be supplied to the voice coil motor, moves the magnetic head to seek between the outermost and innermost tracks on the surface of the magnetic disk to perform a smoothing process for the lubricating layer.

    摘要翻译： 本发明的实施例减少了当磁盘上的润滑层平滑时产生的噪声。 在一个实施例中，当磁头对磁盘执行数据读/写操作时，磁盘驱动器具有用于产生要提供给音圈电机的电流的读/写模式参数表。 磁盘驱动器还具有平滑模式参数表，用于当不对磁盘执行数据读取或写入操作时，产生要提供给音圈电机的另一电流。 CPU指的是读/写模式参数表或平滑模式参数表，并控制提供给音圈电机的电流。 当发生润滑层平滑事件时，CPU参考平滑模式参数表，并且在产生要提供给音圈电机的相关联的电流之后，移动磁头以在表面上的最外侧和最内侧轨迹之间寻找 该磁盘对润滑层进行平滑处理。

    Method and apparatus for detecting servo timing marks in a magnetic disk system
    9.
    发明授权
    Method and apparatus for detecting servo timing marks in a magnetic disk system 失效
    用于检测磁盘系统中的伺服定时标记的方法和装置

    公开(公告)号：US07675701B2

    公开(公告)日：2010-03-09

    申请号：US11600593

    申请日：2006-11-15

    申请人： Hideki Ohzeki ,  Noboru Yoshida ,  Kazuyuki Ishibashi ,  Tetsuo Ueda ,  Isao Yoneda ,  Toshiaki Wada

    发明人： Hideki Ohzeki ,  Noboru Yoshida ,  Kazuyuki Ishibashi ,  Tetsuo Ueda ,  Isao Yoneda ,  Toshiaki Wada

    IPC分类号： G11B5/09

    CPC分类号： G11B5/59688

    摘要： Detection capability of a servo timing mark (STM) is improved. Long STM is configured by pseudo-STM forming part of an AGC/PLL pattern and intrinsic STM. When a system can not recognize the intrinsic STM, it keeps a state that a sector detection window is opened, and is operated in a long STM detection mode to recognize the long STM, thereby generates an STM detection signal. After the STM detection signal has been generated, an STM detection window is closed, and the system is operated in an intrinsic STM detection mode. Since the long STM has longer bit length than the intrinsic STM, it has high discriminating power with respect to other bit patterns. Therefore, even if the sector detection window is remained to be in an opened state, bit strings of data sector, address information in a servo sector or the like is not falsely recognized.

    摘要翻译： 提高伺服定时标志（STM）的检测能力。 长STM由构成AGC / PLL模式和固有STM的一部分的伪STM构成。 当系统不能识别本征STM时，它保持扇区检测窗口打开的状态，并且以长STM检测模式操作以识别长STM，从而生成STM检测信号。 在产生STM检测信号之后，关闭STM检测窗口，并以本征STM检测模式操作系统。 由于长的STM具有比固有的STM更长的位长度，所以它对于其他位模式具有很高的识别能力。 因此，即使扇区检测窗口保持为打开状态，也不会错误地识别数据扇区的位串，伺服扇区中的地址信息等。

    Magnetic disk system
    10.
    发明申请
    Magnetic disk system 失效
    磁盘系统

    公开(公告)号：US20070146919A1

    公开(公告)日：2007-06-28

    申请号：US11600593

    申请日：2006-11-15

    申请人： Hideki Ohzeki ,  Noboru Yoshida ,  Kazuyuki Ishibashi ,  Tetsuo Ueda ,  Isao Yoneda ,  Toshiaki Wada

    发明人： Hideki Ohzeki ,  Noboru Yoshida ,  Kazuyuki Ishibashi ,  Tetsuo Ueda ,  Isao Yoneda ,  Toshiaki Wada

    IPC分类号： G11B5/09 ,  G11B20/10

    CPC分类号： G11B5/59688

    摘要： Detection capability of a servo timing mark (STM) is improved. Long STM is configured by pseudo-STM forming part of an AGC/PLL pattern and intrinsic STM. When a system can not recognize the intrinsic STM, it keeps a state that a sector detection window is opened, and is operated in a long STM detection mode to recognize the long STM, thereby generates an STM detection signal. After the STM detection signal has been generated, an STM detection window is closed, and the system is operated in an intrinsic STM detection mode. Since the long STM has longer bit length than the intrinsic STM, it has high discriminating power with respect to other bit patterns. Therefore, even if the sector detection window is remained to be in an opened state, bit strings of data sector, address information in a servo sector or the like is not falsely recognized.

    摘要翻译： 提高伺服定时标志（STM）的检测能力。 长STM由构成AGC / PLL模式和固有STM的一部分的伪STM构成。 当系统不能识别本征STM时，它保持扇区检测窗口打开的状态，并且以长STM检测模式操作以识别长STM，从而生成STM检测信号。 在产生STM检测信号之后，关闭STM检测窗口，并以本征STM检测模式操作系统。 由于长的STM具有比固有的STM更长的位长度，所以它对于其他位模式具有很高的识别能力。 因此，即使扇区检测窗口保持为打开状态，也不会错误地识别数据扇区的位串，伺服扇区中的地址信息等。