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：US20100142082A1

公开(公告)日：2010-06-10

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

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

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：US08737010B2

公开(公告)日：2014-05-27

申请号：US12876802

申请日：2010-09-07

申请人： Hiroshi Uchida ,  Isao Yoneda ,  Chikako Sakagami ,  Kazuhisa Shishida

发明人： Hiroshi Uchida ,  Isao Yoneda ,  Chikako Sakagami ,  Kazuhisa Shishida

IPC分类号： G11B5/596

CPC分类号： G11B5/59622

摘要： A disk drive comprising a head for accessing a disk, an actuator for moving the head in the radial direction of the disk and a controller. The controller for servo control of the actuator based on servo data read out from the disk by the head. The controller is configured for maintaining a width of the adaptive chasing notch filter below a specified value in servo system control and estimating an oscillation frequency of the actuator.

摘要翻译： 一种磁盘驱动器，包括用于访问磁盘的磁头，用于沿磁盘的径向移动磁头的致动器和控制器。 伺服控制器，用于伺服控制，基于从磁盘读出的伺服数据。 控制器被配置为在伺服系统控制中将自适应追赶陷波滤波器的宽度保持在指定值以下，并且估计致动器的振荡频率。

公开(公告)号：US20110058276A1

公开(公告)日：2011-03-10

申请号：US12876802

申请日：2010-09-07

申请人： Hiroshi Uchida ,  Isao Yoneda ,  Chikako Sakagami ,  Kazuhisa Shishida

发明人： Hiroshi Uchida ,  Isao Yoneda ,  Chikako Sakagami ,  Kazuhisa Shishida

IPC分类号： G11B5/596

CPC分类号： G11B5/59622

摘要： A disk drive comprising a head for accessing a disk, an actuator for moving the head in the radial direction of the disk and a controller. The controller for servo control of the actuator based on servo data read out from the disk by the head. The controller is configured for maintaining a width of the adaptive chasing notch filter below a specified value in servo system control and estimating an oscillation frequency of the actuator.

摘要翻译： 一种磁盘驱动器，包括用于访问磁盘的磁头，用于沿磁盘的径向移动磁头的致动器和控制器。 伺服控制器，用于伺服控制，基于从磁盘读出的伺服数据。 控制器被配置为在伺服系统控制中将自适应追赶陷波滤波器的宽度保持在指定值以下，并且估计致动器的振荡频率。

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：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：US06798606B2

公开(公告)日：2004-09-28

申请号：US10054587

申请日：2002-01-22

申请人： Yifan Tang ,  Craig N. Fukushima ,  Isao Yoneda ,  Hiroshi Uchida

发明人： Yifan Tang ,  Craig N. Fukushima ,  Isao Yoneda ,  Hiroshi Uchida

IPC分类号： G11B5596

CPC分类号： G11B7/0945 ,  G11B5/59627

摘要： Non-linearity in a position error signal (PES) for a data storage device is precisely characterized during a calibration phase in the manufacturing process. From this characterization of the PES non-linearity, the data storage device can be programmed with the necessary data to perform accurate, real-time linearization calculations of the PES in order to compensate for non-linearity in the PES during operation. The sequence of calibration steps includes a PES gain calibration, a first servo loop gain calibration, a PES linearization calibration, and an optional second servo loop gain calibration.

摘要翻译： 数据存储装置的位置误差信号（PES）的非线性在制造过程的校准阶段被精确地表征。 从PES非线性的这种表征可以将数据存储装置编程为必要的数据，以执行PES的精确的实时线性化计算，以便在运行期间补偿PES中的非线性。 校准步骤的顺序包括PES增益校准，第一伺服环路增益校准，PES线性化校准和可选的第二伺服环路增益校准。

公开(公告)号：US07558017B2

公开(公告)日：2009-07-07

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。

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：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 。