公开(公告)号：US5696643A

公开(公告)日：1997-12-09

申请号：US632787

申请日：1996-04-17

申请人： Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Isao Yoneda ,  Kenji Ogasawara

发明人： Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Isao Yoneda ,  Kenji Ogasawara

IPC分类号： G11B5/60 ,  G11B19/04 ,  G11B19/20 ,  G11B23/50 ,  G11B15/46

CPC分类号： G11B5/6005 ,  G11B19/04 ,  G11B19/20 ,  G11B23/505

摘要： A disk drive apparatus and read error recovery method in a disk drive apparatus removes thermal asperities on disk surfaces. A projection, such as a thermal asperity, on the recording surfaces of disks is detected when a signal transducer contacts the projection. The flying height of the signal transducer is lowered, e.g., by reducing the disk rotation speed from the normal rotation speed in read/write operations, while the signal transducer is positioned over the detected projection on the track. The signal transducer strikes the projection to break the projection. This avoids a subsequent error from being caused by the thermal asperity.

摘要翻译： 磁盘驱动装置中的磁盘驱动装置和读取错误恢复方法去除磁盘表面上的热凹凸。 当信号传感器接触投影时，检测在盘的记录表面上的诸如热不均匀性的投影。 信号传感器的飞行高度例如通过在读/写操作中将盘旋转速度从正常旋转速度减小而信号换能器位于轨道上检测到的投影上方。 信号传感器撞击投影以断开投影。 这避免了由热不均匀引起的后续错误。

公开(公告)号：US08553348B2

公开(公告)日：2013-10-08

申请号：US12824160

申请日：2010-06-26

申请人： Isao Yoneda ,  Kazuhisa Shishida ,  Chikako Sakagami ,  Katsuhiko Ohta ,  Kenji Okada

发明人： Isao Yoneda ,  Kazuhisa Shishida ,  Chikako Sakagami ,  Katsuhiko Ohta ,  Kenji Okada

IPC分类号： G11B21/02

CPC分类号： G11B5/59622

摘要： A disk drive. The disk drive includes a head, an actuator, and a controller. The head accesses a disk. The actuator is configured to support the head and to move the head by action of a voice-coil motor in a substantially radial direction of the disk. The controller is also configured to perform servo control of the actuator by using servo data read out by the head. The controller includes at least one of a plurality of notch filters having a fixed center frequency inserted in a servo-control loop. The controller is configured to increase an attenuation rate by at least one of the plurality of notch filters having the fixed center frequency at a designated frequency, when a target position of the head is at a position selected from the group consisting of a position outside of a specified region and a position within the specified region.

摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，致动器和控制器。 磁头访问磁盘。 致动器被构造成支撑头部并且通过音圈电动机在盘的大致径向方向上的动作来移动头部。 控制器还被配置为通过使用由头读出的伺服数据来执行致动器的伺服控制。 控制器包括插入伺服控制回路中的具有固定的中心频率的多个陷波滤波器中的至少一个。 控制器被配置为当头部的目标位置处于从包括位于外部位置之外的位置的位置时，以具有指定频率的固定中心频率的多个陷波滤波器中的至少一个增加衰减率 指定区域和指定区域内的位置。

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 。

公开(公告)号：US08059356B2

公开(公告)日：2011-11-15

申请号：US12631729

申请日：2009-12-04

申请人： Chikako Sakagami ,  Kazuhisa Shishida ,  Isao Yoneda ,  Kazuaki Usui ,  Hiroshi Uchida ,  Takeshi Saito ,  Kenji Tomida ,  Takenori Atsumi

发明人： Chikako Sakagami ,  Kazuhisa Shishida ,  Isao Yoneda ,  Kazuaki Usui ,  Hiroshi Uchida ,  Takeshi Saito ,  Kenji Tomida ,  Takenori Atsumi

IPC分类号： G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/596 ,  G11B5/59622

摘要： A disk drive. The disk drive includes a head, a moving mechanism, a first peak filter, an adaptive peak filter, and a filter controller. The head is configured to read servo data on a disk at sampling frequency. The moving mechanism is configured to move the head in proximity with a recording surface of the disk. The first peak filter has a fixed peak frequency and a variable gain, and is configured to be inserted into a servo loop. The servo loop is configured to position the head with position error signals between servo data read by the head and a target position. The adaptive peak filter has a variable peak frequency and a variable gain, and is configured to be inserted into the servo loop. The filter controller is configured to control the gain of the adaptive peak filter according to the gain of the first peak filter.

摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，移动机构，第一峰值滤波器，自适应峰值滤波器和滤波器控制器。 磁头被配置为以采样频率读取磁盘上的伺服数据。 移动机构被配置为使磁头靠近磁盘的记录表面移动。 第一峰值滤波器具有固定的峰值频率和可变增益，并被配置为插入到伺服环路中。 伺服回路被配置为在头部读取的伺服数据与目标位置之间定位头部位置误差信号。 自适应峰值滤波器具有可变的峰值频率和可变增益，并被配置为插入到伺服环路中。 滤波器控制器被配置为根据第一峰值滤波器的增益来控制自适应峰值滤波器的增益。

公开(公告)号：US20110069411A1

公开(公告)日：2011-03-24

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： G11B5/596

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 。

公开(公告)号：US20100328810A1

公开(公告)日：2010-12-30

申请号：US12824160

申请日：2010-06-26

申请人： Isao Yoneda ,  Kazuhisa Shishida ,  Chikako Sakagami ,  Katsuhiko Ohta ,  Kenji Okada

发明人： Isao Yoneda ,  Kazuhisa Shishida ,  Chikako Sakagami ,  Katsuhiko Ohta ,  Kenji Okada

IPC分类号： G11B21/02

CPC分类号： G11B5/59622

摘要： A disk drive. The disk drive includes a head, an actuator, and a controller. The head accesses a disk. The actuator is configured to support the head and to move the head by action of a voice-coil motor in a substantially radial direction of the disk. The controller is also configured to perform servo control of the actuator by using servo data read out by the head. The controller includes at least one of a plurality of notch filters having a fixed center frequency inserted in a servo-control loop. The controller is configured to increase an attenuation rate by at least one of the plurality of notch filters having the fixed center frequency at a designated frequency, when a target position of the head is at a position selected from the group consisting of a position outside of a specified region and a position within the specified region.

摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，致动器和控制器。 磁头访问磁盘。 致动器被构造成支撑头部并且通过音圈电动机在盘的大致径向方向上的动作来移动头部。 控制器还被配置为通过使用由头读出的伺服数据来执行致动器的伺服控制。 控制器包括插入伺服控制回路中的具有固定的中心频率的多个陷波滤波器中的至少一个。 控制器被配置为当头部的目标位置处于从包括位于外部位置之外的位置的位置时，以具有指定频率的固定中心频率的多个陷波滤波器中的至少一个增加衰减率 指定区域和指定区域内的位置。

公开(公告)号：US07808739B2

公开(公告)日：2010-10-05

申请号：US12290267

申请日：2008-10-28

申请人： Kohji Takasaki ,  Isao Yoneda ,  Nobuhiko Wasa ,  Yasuhiro Iihara

发明人： Kohji Takasaki ,  Isao Yoneda ,  Nobuhiko Wasa ,  Yasuhiro Iihara

IPC分类号： G11B21/02

CPC分类号： G11B19/042 ,  G11B5/5582 ,  G11B5/596

摘要： Embodiments of the present invention help to perform appropriate servo control in response to detected vibration in a disk drive device having a vibration sensor. In an embodiment of the present invention, an HDD switches a correction servo mode to perform vibration correction in head positioning and a normal servo mode not to perform the vibration correction. The HDD performs servo positioning in either one of the serve modes and determines servo positioning accuracy in the servo mode from the measured positional error signal. The HDD obtains data indicating the servo positioning accuracy in the other servo mode from a table. The HDD compares the accuracy in the two servo modes and selects the servo mode with higher accuracy. The table contains previous measurements on servo positioning accuracy in the servo modes.

摘要翻译： 本发明的实施例有助于响应于具有振动传感器的盘驱动装置中的检测到的振动来执行适当的伺服控制。 在本发明的实施例中，HDD切换校正伺服模式以执行磁头定位中的振动校正和不进行振动校正的正常伺服模式。 HDD以任一种服务模式执行伺服定位，并根据测量的位置误差信号确定伺服模式下的伺服定位精度。 HDD从表中获取表示其他伺服模式中的伺服定位精度的数据。 HDD比较两种伺服模式的精度，并以更高的精度选择伺服模式。 该表包含以前对伺服模式下伺服定位精度的测量。

公开(公告)号：US20090135516A1

公开(公告)日：2009-05-28

申请号：US12290267

申请日：2008-10-28

申请人： Kohji Takasaki ,  Isao Yoneda ,  Nobuhiko Wasa ,  Yasuhiro Iihara

发明人： Kohji Takasaki ,  Isao Yoneda ,  Nobuhiko Wasa ,  Yasuhiro Iihara

IPC分类号： G11B21/02

CPC分类号： G11B19/042 ,  G11B5/5582 ,  G11B5/596

摘要： Embodiments of the present invention help to perform appropriate servo control in response to detected vibration in a disk drive device having a vibration sensor. In an embodiment of the present invention, an HDD switches a correction servo mode to perform vibration correction in head positioning and a normal servo mode not to perform the vibration correction. The HDD performs servo positioning in either one of the serve modes and determines servo positioning accuracy in the servo mode from the measured positional error signal. The HDD obtains data indicating the servo positioning accuracy in the other servo mode from a table. The HDD compares the accuracy in the two servo modes and selects the servo mode with higher accuracy. The table contains previous measurements on servo positioning accuracy in the servo modes.

摘要翻译： 本发明的实施例有助于响应于具有振动传感器的盘驱动装置中的检测到的振动来执行适当的伺服控制。 在本发明的实施例中，HDD切换校正伺服模式以执行磁头定位中的振动校正和不进行振动校正的正常伺服模式。 HDD以任一种服务模式执行伺服定位，并根据测量的位置误差信号确定伺服模式下的伺服定位精度。 HDD从表中获取表示其他伺服模式中的伺服定位精度的数据。 HDD比较两种伺服模式的精度，并以更高的精度选择伺服模式。 该表包含以前对伺服模式下伺服定位精度的测量。

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：US20070258163A1

公开(公告)日：2007-11-08

申请号：US11789770

申请日：2007-04-24

申请人： Isao Yoneda ,  Kazuyuki Ishibashi ,  Takeshi Chawanya ,  Hiroshi Uchida

发明人： Isao Yoneda ,  Kazuyuki Ishibashi ,  Takeshi Chawanya ,  Hiroshi Uchida

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B5/5526 ,  G11B21/12

摘要： Embodiments in accordance with the present invention provide a magnetic disk drive with sufficiently low noise. A digital/analog converter supplies to a voice coil motor (VCM) driver a control voltage comprising a first preset voltage value, a second preset voltage value, and a transition voltage value of a substantially cosine wave that interconnects the first preset voltage value and the second preset voltage value. A driving current is supplied from the VCM driver to a voice coil of an actuator assembly. Since a current not containing higher-harmonic components in a transition period flows as a VCM current that flows into the voice coil, vibromotive force can be easily suppressed by shifting a structural resonance point of the entire disk drive including the actuator assembly. In addition, since the back electromotive force occurring in an inductance element is cleared to zero during a half wavelength of period of the cosine wave, speed electromotive force can be measured by immediate shifting from a setting period to a measuring period.

摘要翻译： 根据本发明的实施例提供具有足够低噪声的磁盘驱动器。 数字/模拟转换器向音圈电机（VCM）驱动器提供包括第一预设电压值，第二预设电压值和互连第一预设电压值和基本上余弦波的转换电压值的控制电压， 第二预设电压值。 驱动电流从VCM驱动器提供给致动器组件的音圈。 由于在过渡期间不包含高次谐波分量的电流作为流入音圈的VCM电流流动，所以通过移动包括致动器组件在内的整个磁盘驱动器的结构共振点，可以容易地抑制振动力。 此外，由于在余弦波的周期的半波长期间，电感元件中产生的反电动势被清零，所以可以通过立即从设定周期向测量周期移动来测量速度电动势。