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1. 发明授权

US06574065B1 Method and apparatus for adaptive resonance mode cancellation servo in a rotating storage system 失效
标题翻译：旋转存储系统中自适应共振模式消除伺服的方法和装置
公开(公告)号：US06574065B1
公开(公告)日：2003-06-03
申请号：US09311307
申请日：1999-05-14
申请人： Sri M. Sri-Jayantha , Arun Sharma , Hien Dang , Tetsuo Ueda , Kenji Okada , Hideo Asano , Tatsuya Endoh , Masayuki Takeuchi
发明人： Sri M. Sri-Jayantha , Arun Sharma , Hien Dang , Tetsuo Ueda , Kenji Okada , Hideo Asano , Tatsuya Endoh , Masayuki Takeuchi
IPC分类号： G11B2102
CPC分类号： G11B21/083 , G11B5/59605
摘要： A method and apparatus for adaptive resonance cancellation in a rotating storage system, includes designing a set of digitally selectable optimum resonance cancellation filters, generating a series of excitation signals for injection into the filters, generating a characteristic resonance frequency based on the excitation signals, and computing an address pointer corresponding to the resonance frequency, to select an optimum resonance cancellation filter.
摘要翻译：一种用于旋转存储系统中自适应共振消除的方法和装置，包括设计一组数字可选择的最佳共振消除滤波器，产生一系列用于注入滤波器的激励信号，基于激励信号产生特征谐振频率，以及计算对应于谐振频率的地址指针，以选择最佳谐振消除滤波器。

2. 发明授权

US06947243B2 Method and system for time-shift based rotational vibration sensing in disk drives 失效
公开(公告)号：US06947243B2
公开(公告)日：2005-09-20
申请号：US10153683
申请日：2002-05-24
申请人： Hien Dang , Isao Yoneda , Tetsuo Ueda , Yuzo Nakagawa , Sri M. Sri-Jayantha
发明人： Hien Dang , Isao Yoneda , Tetsuo Ueda , Yuzo Nakagawa , Sri M. Sri-Jayantha
IPC分类号： G11B5/55 , G11B5/596 , G11B25/04
CPC分类号： G11B5/59627 , G11B5/5582 , G11B5/596 , G11B25/043
摘要： A method (and structure) senses a rotational vibration of a disk drive. The disk drive includes a rotating disk. The disk includes a plurality of reference bits across a surface thereof. The method (and structure) includes detecting the reference bits across a pattern on the rotating disk, and analyzing a time interval between adjacent ones of the reference bits.

3. 发明授权

US07724457B2 Method and system for time-shift based rotational vibration sensing in disk drives 有权
标题翻译：在磁盘驱动器中基于时移的旋转振动感测的方法和系统
公开(公告)号：US07724457B2
公开(公告)日：2010-05-25
申请号：US11201673
申请日：2005-08-10
申请人： Hien Dang , Isao Yoneda , Tetsuo Ueda , Yuzo Nakagawa , Sri M. Sri-Jayantha
发明人： Hien Dang , Isao Yoneda , Tetsuo Ueda , Yuzo Nakagawa , Sri M. Sri-Jayantha
IPC分类号： G11B5/09
CPC分类号： G11B5/59627 , G11B5/5582 , G11B5/596 , G11B25/043
摘要： A method (and structure) senses a rotational vibration of a disk drive. The disk drive includes a rotating disk. The disk includes a plurality of reference bits across a surface thereof. The method (and structure) includes detecting the reference bits across a pattern on the rotating disk, and analyzing a time interval between adjacent ones of the reference bits.
摘要翻译：方法（和结构）感测磁盘驱动器的旋转振动。磁盘驱动器包括旋转盘。盘包括跨越其表面的多个参考位。方法（和结构）包括检测旋转盘上的图案上的参考位，以及分析相邻参考位之间的时间间隔。

4. 发明授权

US06339512B1 Disk-flutter servo control in rotating storage system with optimum disk thickness 有权
标题翻译：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。

5. 发明授权

US06487028B1 Servo system for disk-flutter in rotating storage systems 有权
标题翻译：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。

6. 发明授权

US06597530B2 Method and apparatus for disk drive seek control 失效
公开(公告)号：US06597530B2
公开(公告)日：2003-07-22
申请号：US09935272
申请日：2001-08-22
申请人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
发明人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
IPC分类号： G11B5596
CPC分类号： G11B5/5547
摘要： A disk drive seek control system device to reduce track pitch. When data is recorded, an offset value is added to the position of a read head element along the width of a track corresponding to an offset &Dgr;w between the read head element and a write head element. The value of the offset depends on the yaw angle &thgr; of the head. When data is read, the position of the read head element is chosen to be either the position of the write head element during write operations, or the midpoint between the position of the write head element and the read head element during write operations, or the center of a track.

7. 发明授权

US06456451B1 Method and apparatus for disk drive seek control 失效
公开(公告)号：US06456451B1
公开(公告)日：2002-09-24
申请号：US09220419
申请日：1998-12-24
申请人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
发明人： Hideo Asano , Kenji Okada , Tetsuo Ueda , Koichi Arai , Hideki Ohzeki
IPC分类号： G11B5596
CPC分类号： G11B5/5547
摘要： A disk drive seek control system device to reduce track pitch. When data is recorded, an offset value is added to the position of a read head element along the width of a track corresponding to an offset &Dgr;w between the read head element and a write head element. The value of the offset depends on the yaw angle &thgr; of the head. When data is read, the position of the read head element is chosen to be either the position of the write head element during write operations, or the midpoint between the position of the write head element and the read head element during write operations, or the center of a track.

8. 发明申请

US20050270685A1 Method and system for time-shift based rotational vibration sensing in disk drives 有权
标题翻译：在磁盘驱动器中基于时移的旋转振动感测的方法和系统
公开(公告)号：US20050270685A1
公开(公告)日：2005-12-08
申请号：US11201673
申请日：2005-08-10
申请人： Hien Dang , Isao Yuneda , Tetsuo Ueda , Yuzo Nakagawa , Sri Sri-Jayantha
发明人： Hien Dang , Isao Yuneda , Tetsuo Ueda , Yuzo Nakagawa , Sri Sri-Jayantha
IPC分类号： G11B5/55 , G11B5/596 , G11B25/04 , G11B21/02
CPC分类号： G11B5/59627 , G11B5/5582 , G11B5/596 , G11B25/043
摘要： A method (and structure) senses a rotational vibration of a disk drive. The disk drive includes a rotating disk. The disk includes a plurality of reference bits across a surface thereof. The method (and structure) includes detecting the reference bits across a pattern on the rotating disk, and analyzing a time interval between adjacent ones of the reference bits.
摘要翻译：方法（和结构）感测磁盘驱动器的旋转振动。磁盘驱动器包括旋转盘。盘包括跨越其表面的多个参考位。方法（和结构）包括检测旋转盘上的图案上的参考位，以及分析相邻参考位之间的时间间隔。

9. 发明授权

US06441982B1 Dummy write method for a magnetic head and drive unit for carrying out the method 失效
标题翻译：用于执行该方法的磁头和驱动单元的虚拟写入方法
公开(公告)号：US06441982B1
公开(公告)日：2002-08-27
申请号：US09448234
申请日：1999-11-24
申请人： Yukio Fukushima , Tetsuo Ueda , Hideo Asano
发明人： Yukio Fukushima , Tetsuo Ueda , Hideo Asano
IPC分类号： G11B509
CPC分类号： G11B5/00 , G11B5/012 , G11B2005/0008 , G11B2005/0013 , G11B2005/0021
摘要： A drive unit which recovers from write instability by heating the magnetic head prior to performing a dummy write operation is described. In the preferred embodiments, once write instability has been detected the head may be heated by friction with the rotating disk or by an external heater. In the friction method the head is moved to a safe area of the disk such as a textured landing zone while the disk rotation is continued. In drives using unload ramps, a heater is preferably placed at the the ramp so that the head can be heated while parked on the ramp. In each of these embodiments dummy write operations are performed while the head is in a thermally excited state due to the heating. The combination of heating and the dummy write operation aids in restoring write stability.
摘要翻译：描述通过在执行虚拟写入操作之前加热磁头而从写入不稳定性恢复的驱动单元。在优选实施例中，一旦检测到写入不稳定性，头部可以通过与旋转盘的摩擦或外部加热器的摩擦来加热。在摩擦方法中，当盘旋转持续时，头移动到盘的安全区域，例如纹理着陆区。在使用卸载斜坡的驱动器中，优选地将加热器放置在斜坡处，使得头部可以在停放在斜坡上时被加热。在这些实施例的每一个中，由于加热，头部处于热激发状态时执行伪写入操作。加热和虚拟写入操作的组合有助于恢复写入稳定性。

10. 发明授权

US06556369B1 Disk drive device with a high frequency access method and apparatus 有权
标题翻译：具有高频率存取方式和装置的磁盘驱动装置
公开(公告)号：US06556369B1
公开(公告)日：2003-04-29
申请号：US09448227
申请日：1999-11-24
申请人： Atsushi Kanamaru , Hideo Asano , Tetsuo Ueda
发明人： Atsushi Kanamaru , Hideo Asano , Tetsuo Ueda
IPC分类号： G11B509
CPC分类号： G11B20/1883 , G11B5/012 , G11B5/5547 , G11B5/59633 , G11B5/82 , G11B27/329 , G11B2020/10916 , G11B2220/20
摘要： A disk drive device comprising a disk-shaped recording medium, having a recording surface on which a plurality of tracks having a predetermined width in a radial direction are defined, said recording surface including a first area wherein a plurality of recording tracks and a plurality of non-recording tracks are located so as to form an alternating pattern along the radial direction of the recording surface. The disk drive device may further comprise: a transducer to record information on the disk-shaped recording medium; a position error detector element to detect position error relative to a target track to be recorded on; an actuator to move the transducer to the target track according to the position error; and an end-of-seek detector, wherein when the transducer is moved to a target track inside the predetermined area the end-of-seek detector determines an end of seek based on whether the position error is less than a first threshold, and when the transducer is moved to a target track outside the predetermined area, the end-of-seek detector determines an end of seek based on whether the position error is less than a second threshold, wherein the second threshold is less than the first threshold.
摘要翻译：一种盘驱动装置，其特征在于，具有盘状记录媒体，具有记录面，在该记录面上形成有沿径向具有预定宽度的多个轨迹，所述记录面包括：第一区域，其中多个记录道和多个记录道非记录磁道位于记录表面的径向方向上形成交替图案。磁盘驱动器装置还可以包括：用于在盘状记录介质上记录信息的换能器; 用于检测相对于要记录的目标轨迹的位置误差的位置误差检测器元件; 根据位置误差将传感器移动到目标轨道的致动器; 以及搜索结束检测器，其中当所述换能器被移动到所述预定区域内的目标轨迹时，所述寻求终点检测器基于所述位置误差是否小于第一阈值来确定搜索结束，以及何时换能器被移动到预定区域外的目标轨道，寻求终点探测器基于位置误差是否小于第二阈值来确定搜索结束，其中第二阈值小于第一阈值。

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