公开(公告)号：US07489470B2

公开(公告)日：2009-02-10

申请号：US11725038

申请日：2007-03-15

申请人： Hiroshi Uchida ,  Mirei Hosono ,  Hideki Ohzeki ,  Tetsuo Ueda

发明人： Hiroshi Uchida ,  Mirei Hosono ,  Hideki Ohzeki ,  Tetsuo Ueda

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： Embodiments of the present invention provide a magnetic recording apparatus capable of generating RRO compensation information that can expand the disturbance frequency range in which to compensate for RRO. Embodiments of the present invention describe a magnetic recording apparatus that uses a plurality of repetitive control systems to detect repeatable runout during the rotation of a magnetic recording medium for a frequency characteristic of each of the repetitive control systems. The magnetic recording apparatus further generates compensation information to compensate for each of the detected repeatable runout. The magnetic recording apparatus still further writes the compensation information generated for each of the repetitive control systems to a servo signal, thus suppressing and controlling the repeatable runout.

摘要翻译： 本发明的实施例提供一种磁记录装置，其能够产生可以扩大其中补偿RRO的干扰频率范围的RRO补偿信息。 本发明的实施例描述了一种磁记录装置，其使用多个重复控制系统来检测用于每个重复控制系统的频率特性的磁记录介质旋转期间的可重复跳动。 磁记录装置进一步产生补偿信息以补偿每个检测到的可重复跳动。 磁记录装置还将针对每个重复控制系统生成的补偿信息写入伺服信号，从而抑制和控制可重复的跳动。

公开(公告)号：US20080186617A1

公开(公告)日：2008-08-07

申请号：US12069311

申请日：2008-02-07

申请人： Mirei Hosono ,  Kazunari Tsuchimoto ,  Hideki Ohzeki ,  Tetsuo Ueda ,  Isao Yoneda ,  Kazuyuki Ishibashi ,  Hiroshi Uchida

发明人： Mirei Hosono ,  Kazunari Tsuchimoto ,  Hideki Ohzeki ,  Tetsuo Ueda ,  Isao Yoneda ,  Kazuyuki Ishibashi ,  Hiroshi Uchida

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59627

摘要： Embodiments of the present invention help to achieve a read error recovery, and suppress decreases in the capacity of the disk drive device and degradation in performance. In one embodiment, a hard disk drive (HDD) performs following control without use of repeatable run-out (RRO) compensation information on a magnetic disk in a normal reading process. When an error occurs in a normal reading process, the HDD moves a read element to a position different from a target position of the normal reading process. At the position where the read element has been moved, the read element reads out the RRO compensation information. In a recovery procedure for the reading process where the error has occurred, the HDD performs following control with compensation by the servo compensation information read out by the read element.

摘要翻译： 本发明的实施例有助于实现读错误恢复，并且抑制磁盘驱动装置的容量的降低和性能的降低。 在一个实施例中，硬盘驱动器（HDD）在正常读取过程中不使用磁盘上的可重复的耗尽（RRO）补偿信息执行以下控制。 当在正常读取过程中发生错误时，HDD将读取元件移动到与正常读取处理的目标位置不同的位置。 在读取元素移动的位置，读取元件读出RRO补偿信息。 在发生错误的读取处理的恢复过程中，HDD通过由读取元素读出的伺服补偿信息进行补偿来执行以下控制。

公开(公告)号：US07595955B2

公开(公告)日：2009-09-29

申请号：US12069311

申请日：2008-02-07

申请人： Mirei Hosono ,  Kazunari Tsuchimoto ,  Hideki Ohzeki ,  Tetsuo Ueda ,  Isao Yoneda ,  Kazuyuki Ishibashi ,  Hiroshi Uchida

发明人： Mirei Hosono ,  Kazunari Tsuchimoto ,  Hideki Ohzeki ,  Tetsuo Ueda ,  Isao Yoneda ,  Kazuyuki Ishibashi ,  Hiroshi Uchida

IPC分类号： G11B5/596 ,  G11B20/20

CPC分类号： G11B5/59688 ,  G11B5/59627

摘要： Embodiments of the present invention help to achieve a read error recovery, and suppress decreases in the capacity of the disk drive device and degradation in performance. In one embodiment, a hard disk drive (HDD) performs following control without use of repeatable run-out (RRO) compensation information on a magnetic disk in a normal reading process. When an error occurs in a normal reading process, the HDD moves a read element to a position different from a target position of the normal reading process. At the position where the read element has been moved, the read element reads out the RRO compensation information. In a recovery procedure for the reading process where the error has occurred, the HDD performs following control with compensation by the servo compensation information read out by the read element.

摘要翻译： 本发明的实施例有助于实现读错误恢复，并且抑制磁盘驱动装置的容量的降低和性能的降低。 在一个实施例中，硬盘驱动器（HDD）在正常读取过程中不使用磁盘上的可重复的耗尽（RRO）补偿信息执行以下控制。 当在正常读取过程中发生错误时，HDD将读取元件移动到与正常读取处理的目标位置不同的位置。 在读取元素移动的位置，读取元件读出RRO补偿信息。 在发生错误的读取处理的恢复过程中，HDD通过由读取元素读出的伺服补偿信息进行补偿来执行以下控制。

公开(公告)号：US20070230025A1

公开(公告)日：2007-10-04

申请号：US11725038

申请日：2007-03-15

申请人： Hiroshi Uchida ,  Mirei Hosono ,  Hideki Ohzeki ,  Tetsuo Ueda

发明人： Hiroshi Uchida ,  Mirei Hosono ,  Hideki Ohzeki ,  Tetsuo Ueda

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： Embodiments of the present invention provide a magnetic recording apparatus capable of generating RRO compensation information that can expand the disturbance frequency range in which to compensate for RRO. Embodiments of the present invention describe a magnetic recording apparatus that uses a plurality of repetitive control systems to detect repeatable runout during the rotation of a magnetic recording medium for a frequency characteristic of each of the repetitive control systems. The magnetic recording apparatus further generates compensation information to compensate for each of the detected repeatable runout. The magnetic recording apparatus still further writes the compensation information generated for each of the repetitive control systems to a servo signal, thus suppressing and controlling the repeatable runout.

摘要翻译： 本发明的实施例提供一种磁记录装置，其能够产生可以扩大其中补偿RRO的干扰频率范围的RRO补偿信息。 本发明的实施例描述了一种磁记录装置，其使用多个重复控制系统来检测用于每个重复控制系统的频率特性的磁记录介质旋转期间的可重复跳动。 磁记录装置进一步产生补偿信息以补偿每个检测到的可重复跳动。 磁记录装置还将针对每个重复控制系统生成的补偿信息写入伺服信号，从而抑制和控制可重复的跳动。

公开(公告)号：US07933091B2

公开(公告)日：2011-04-26

申请号：US12283561

申请日：2008-09-11

申请人： Hiroshi Uchida ,  Hideki Ohzeki

发明人： Hiroshi Uchida ,  Hideki Ohzeki

IPC分类号： G11B5/596

CPC分类号： G11B5/5582 ,  G11B5/59627 ,  G11B19/042

摘要： Embodiments of the present invention provide a magnetic disk drive capable of easily suppressing degradation of position error caused by disturbance resulting from vibration from the outside. According to one embodiment, the magnetic disk drive acquires, during a period of time of track following control, data necessary for determining a filtering characteristic required to newly be specified in a peak filter; in association with the start of subsequent seek control, determines the filtering characteristic required to be specified in the peak filter; and specifies the determined filtering characteristic in the peak filter.

摘要翻译： 本发明的实施例提供一种磁盘驱动器，其能够容易地抑制由来自外部的振动引起的干扰引起的位置误差的劣化。 根据一个实施例，磁盘驱动器在跟踪控制的时间段期间获取确定在峰值滤波器中新指定的滤波特性所需的数据; 与后续寻道控制的开始相关联，确定峰值滤波器中规定的滤波特性; 并指定峰值滤波器中确定的滤波特性。

公开(公告)号：US07619849B2

公开(公告)日：2009-11-17

申请号：US11796228

申请日：2007-04-26

申请人： Hiroshi Uchida ,  Isao Yoneda ,  Hideki Ohzeki

发明人： Hiroshi Uchida ,  Isao Yoneda ,  Hideki Ohzeki

IPC分类号： G11B5/596

CPC分类号： G11B5/5526

摘要： Embodiments in accordance with the present invention provide a magnetic disk drive with reduced noise during seek operation without causing any delay in control response. According to one embodiment of the present invention, a control circuit of a magnetic disk drive controls the drive power supplied to a voice coil motor during a seek operation adapted to move a magnetic head over a target track formed on a magnetic disk so as to bring the travel speed of the magnetic head close to a predetermined target speed. The control circuit determines a provisional current according to the difference between the predetermined target speed and an actual travel speed in an acceleration zone adapted to accelerate the magnetic head to the predetermined target speed. If the provisional current exceeds a limit specified in relation to an elapsed time from the start of acceleration, the control circuit sets the limit as the current of the drive power supplied to the voice coil motor to control the motor.

摘要翻译： 根据本发明的实施例提供一种在寻道操作期间具有降低的噪声的磁盘驱动器，而不会导致控制响应的任何延迟。 根据本发明的一个实施例，磁盘驱动器的控制电路在搜索操作期间控制提供给音圈电机的驱动电力，以便将磁头移动到形成在磁盘上的目标磁道上，以便带动 磁头的行进速度接近预定的目标速度。 控制电路根据预定目标速度与适于将磁头加速到预定目标速度的加速区域中的实际行驶速度之间的差异来确定临时电流。 如果临时电流超过关于从加速开始起的经过时间规定的限制，则控制电路将限制设定为作为提供给音圈电动机的驱动电力的电流以控制电动机。

公开(公告)号：US20090073601A1

公开(公告)日：2009-03-19

申请号：US12283561

申请日：2008-09-11

申请人： Hiroshi Uchida ,  Hideki Ohzeki

发明人： Hiroshi Uchida ,  Hideki Ohzeki

IPC分类号： G11B5/596

CPC分类号： G11B5/5582 ,  G11B5/59627 ,  G11B19/042

摘要： Embodiments of the present invention provide a magnetic disk drive capable of easily suppressing degradation of position error caused by disturbance resulting from vibration from the outside. According to one embodiment, the magnetic disk drive acquires, during a period of time of track following control, data necessary for determining a filtering characteristic required to newly be specified in a peak filter; in association with the start of subsequent seek control, determines the filtering characteristic required to be specified in the peak filter; and specifies the determined filtering characteristic in the peak filter.

摘要翻译： 本发明的实施例提供一种磁盘驱动器，其能够容易地抑制由来自外部的振动引起的干扰引起的位置误差的劣化。 根据一个实施例，磁盘驱动器在跟踪控制的时间段期间获取确定在峰值滤波器中新指定的滤波特性所需的数据; 与后续寻道控制的开始相关联，确定峰值滤波器中规定的滤波特性; 并指定峰值滤波器中确定的滤波特性。

公开(公告)号：US20070253100A1

公开(公告)日：2007-11-01

申请号：US11796228

申请日：2007-04-26

申请人： Hiroshi Uchida ,  Isao Yoneda ,  Hideki Ohzeki

发明人： Hiroshi Uchida ,  Isao Yoneda ,  Hideki Ohzeki

IPC分类号： G11B5/596

CPC分类号： G11B5/5526

摘要： Embodiments in accordance with the present invention provide a magnetic disk drive with reduced noise during seek operation without causing any delay in control response. According to one embodiment of the present invention, a control circuit of a magnetic disk drive controls the drive power supplied to a voice coil motor during a seek operation adapted to move a magnetic head over a target track formed on a magnetic disk so as to bring the travel speed of the magnetic head close to a predetermined target speed. The control circuit determines a provisional current according to the difference between the predetermined target speed and an actual travel speed in an acceleration zone adapted to accelerate the magnetic head to the predetermined target speed. If the provisional current exceeds a limit specified in relation to an elapsed time from the start of acceleration, the control circuit sets the limit as the current of the drive power supplied to the voice coil motor to control the motor.

摘要翻译： 根据本发明的实施例提供一种在寻道操作期间具有降低的噪声的磁盘驱动器，而不会导致控制响应的任何延迟。 根据本发明的一个实施例，磁盘驱动器的控制电路在搜索操作期间控制提供给音圈电机的驱动电力，以便将磁头移动到形成在磁盘上的目标磁道上，以便带动 磁头的行进速度接近预定的目标速度。 控制电路根据预定目标速度与适于将磁头加速到预定目标速度的加速区域中的实际行驶速度之间的差异来确定临时电流。 如果临时电流超过关于从加速开始起的经过时间规定的限制，则控制电路将限制设定为作为提供给音圈电动机的驱动电力的电流以控制电动机。

公开(公告)号：US20090290251A1

公开(公告)日：2009-11-26

申请号：US12470460

申请日：2009-05-21

申请人： Jiro Abe ,  Hiroshi Uchida ,  Tetsuo Ueda

发明人： Jiro Abe ,  Hiroshi Uchida ,  Tetsuo Ueda

IPC分类号： G11B21/02 ,  G11B5/127

CPC分类号： G11B5/09 ,  G11B19/045 ,  G11B2220/2516 ,  Y10T29/49025

摘要： A hard-disk drive. The hard-disk drive includes a magnetic-recording disk having a plurality of tracks formed thereon. The hard-disk drive also includes a magnetic-recording head configured to be positioned over a target track selected from the plurality of tracks and configured to write data to and to read data from the target track. Moreover, the hard-disk drive includes a range-definer configured to define an allowed range of a position error of the magnetic-recording head corresponding to the target track. In addition, the hard-disk drive includes a write-enabler configured to determine whether writing data by the magnetic-recording head is allowed based on the position error of the magnetic-recording head with respect to the target track and the allowed range that is calculated from data read out by the magnetic-recording head.

摘要翻译： 硬盘驱动器。 硬盘驱动器包括其上形成有多个轨道的磁记录盘。 硬盘驱动器还包括磁记录头，其被配置为定位在从多个轨道中选择的目标轨道上方，并被配置为向目标轨道写入数据并从其读取数据。 此外，硬盘驱动器包括范围定义器，其被配置为限定对应于目标轨道的磁记录头的位置误差的允许范围。 此外，硬盘驱动器还包括写使能器，其被配置为基于磁记录头相对于目标轨迹的位置误差和允许的范围是否允许由磁记录头写入数据 由磁记录头读出的数据计算出来。

公开(公告)号：US08503124B2

公开(公告)日：2013-08-06

申请号：US12562911

申请日：2009-09-18

申请人： Hiroshi Uchida ,  Tetsuo Ueda ,  Chikako Sasaki ,  Isao Yoneda ,  Masahito Nitta

发明人： Hiroshi Uchida ,  Tetsuo Ueda ,  Chikako Sasaki ,  Isao Yoneda ,  Masahito Nitta

IPC分类号： G11B5/02

CPC分类号： G11B5/59622 ,  G11B19/042

摘要： A servo control system configured to position a head in accordance with position error signals between servo data on a disk read by the head in a servo sampling cycle and a target position. The system includes a plurality of adaptive peak filters connected in parallel configured to filter the position error signals and configured to change filter coefficients adaptively, and an estimator configured to estimate head vibration caused by disturbances using the servo data read by the head. The system further includes a selector configured to select a portion of the plurality of adaptive peak filters at preset occasions, and a setter configured to update coefficient settings of the portion of the adaptive peak filters selected by the selector in accordance with an estimation by the estimator.

摘要翻译： 一种伺服控制系统，其被配置为根据在伺服采样周期中由磁头读取的磁盘上的伺服数据与目标位置之间的位置误差信号来定位磁头。 该系统包括并联连接的多个自适应峰值滤波器，被配置为过滤位置误差信号并被配置为自适应地改变滤波器系数;以及估计器，被配置为使用由磁头读取的伺服数据来估计由干扰引起的头部振动。 该系统还包括一个选择器，被配置为在预设场合选择多个自适应峰值滤波器的一部分，以及一个被配置为根据估计器的估计来更新由选择器选择的自适应峰值滤波部分的系数设置 。