公开(公告)号：US08896955B1

公开(公告)日：2014-11-25

申请号：US13162095

申请日：2011-06-16

申请人： Min Chen ,  Alain Chahwan ,  Shang-Chen Wu ,  Qixing Zheng ,  Alexander Babinski ,  Duc T. Phan

发明人： Min Chen ,  Alain Chahwan ,  Shang-Chen Wu ,  Qixing Zheng ,  Alexander Babinski ,  Duc T. Phan

IPC分类号： G11B5/596

CPC分类号： G11B5/59622 ,  G11B5/59694

摘要： A disk drive comprises a track follow control system having a plurality of selectable frequency modes, the track follow control system configured to receive a position error signal and to output a control signal based on the position error signal, wherein the control signal is used by a head assembly to position a head over a disk. The disk drive also comprises a state estimator configured to receive the control signal and a position signal indicating a position of the head, to estimate a disturbance based on the control signal and the position signal, and to output an estimated disturbance signal based on the estimated disturbance. The disk drive further comprises a disturbance evaluator configured to receive the estimated disturbance signal, and to select one of the frequency modes of the track follow control system based on the estimated disturbance signal.

摘要翻译： 磁盘驱动器包括具有多个可选频率模式的轨道跟随控制系统，轨道跟随控制系统被配置为接收位置误差信号并基于位置误差信号输出控制信号，其中控制信号由 头部组件以将磁头定位在磁盘上。 磁盘驱动器还包括状态估计器，其被配置为接收控制信号和指示头部的位置的位置信号，以基于控制信号和位置信号来估计干扰，并且基于所估计的干扰信号来输出估计的干扰信号 骚乱。 磁盘驱动器还包括被配置为接收所估计的干扰信号的干扰评估器，并且基于估计的干扰信号选择轨道跟随控制系统的频率模式之一。

公开(公告)号：US08179626B1

公开(公告)日：2012-05-15

申请号：US12631716

申请日：2009-12-04

申请人： Robert P. Ryan ,  Don Brunnett ,  Alain Chahwan ,  Duc T. Phan

发明人： Robert P. Ryan ,  Don Brunnett ,  Alain Chahwan ,  Duc T. Phan

IPC分类号： G11B27/36

CPC分类号： G11B5/5582 ,  G11B19/042

摘要： Adaptive shock detection systems are provided according to various embodiments of the present invention. In one embodiment, an adaptive shock detection system comprises a shock sensing circuit, and a controller configured to receive shock detection signals from the shock sensing circuit and to dynamically adjust a sensitivity of the shock sensing circuit based the received shock detection signals.

摘要翻译： 根据本发明的各种实施例提供自适应冲击检测系统。 在一个实施例中，自适应冲击检测系统包括冲击检测电路和被配置为从冲击感测电路接收冲击检测信号并且基于所接收的冲击检测信号动态地调整冲击感测电路的灵敏度的控制器。

公开(公告)号：US08315006B1

公开(公告)日：2012-11-20

申请号：US12720568

申请日：2010-03-09

申请人： Alain Chahwan ,  Hien T. Chu ,  Duc T. Phan

发明人： Alain Chahwan ,  Hien T. Chu ,  Duc T. Phan

IPC分类号： G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/59627 ,  G11B5/59688 ,  G11B5/59694 ,  G11B19/042

摘要： Systems and methods for writing data to a disk under write disturbance conditions are provided. In one embodiment, a disk drive comprises a disk and a detection system configured to detect a write disturbance condition. The disk drive further comprises a controller configured to alternately operate in a normal mode and a write disturbance mode, wherein, the controller is configured to write data to data tracks on the disk in the normal mode and to write data to data tracks on the disk that are spaced farther apart in the write disturbance mode, and the controller is configured to switch from the normal mode to the write disturbance mode when the detection system detects the write disturbance condition.

摘要翻译： 提供了在写入干扰条件下将数据写入磁盘的系统和方法。 在一个实施例中，磁盘驱动器包括盘和被配置为检测写入干扰状况的检测系统。 磁盘驱动器还包括被配置为在正常模式和写入干扰模式下交替操作的控制器，其中，控制器被配置为以正常模式将数据写入到磁盘上的数据磁道，并将数据写入到磁盘上的数据磁道 在写入干扰模式下间隔得更远，并且当检测系统检测到写入干扰条件时，控制器被配置为从正常模式切换到写入干扰模式。

公开(公告)号：US08634158B1

公开(公告)日：2014-01-21

申请号：US13298170

申请日：2011-11-16

申请人： Alain Chahwan ,  William Flynn

发明人： Alain Chahwan ,  William Flynn

IPC分类号： G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/59694 ,  G11B19/042

摘要： A disk drive is disclosed comprising a disk, a head, an actuator for actuating the head over the disk, and control circuitry comprising a servo control system for controlling the actuator. A compensation value is generated based on a speaker driver signal, and the actuator is controlled using the compensation value.

摘要翻译： 公开了一种磁盘驱动器，包括盘，头，用于在盘上驱动头的致动器，以及包括用于控制致动器的伺服控制系统的控制电路。 基于扬声器驱动器信号产生补偿值，并且使用补偿值来控制致动器。

公开(公告)号：US07471483B1

公开(公告)日：2008-12-30

申请号：US11857768

申请日：2007-09-19

申请人： Timothy A. Ferris ,  Alain Chahwan

发明人： Timothy A. Ferris ,  Alain Chahwan

IPC分类号： G11B21/02

CPC分类号： G11B5/5565 ,  G11B5/5582

摘要： A disk drive is disclosed comprising a disk, and a head actuated radially over the disk. A first linear acceleration signal is generated representing a first acceleration disturbance, a second linear acceleration signal is generated representing a second acceleration disturbance, and a third linear acceleration signal is generated representing a thermal popping disturbance. The first linear acceleration signal is combined with the third linear acceleration signal to generate a fourth linear acceleration signal representing a combined physical shock disturbance and thermal popping disturbance.

摘要翻译： 公开了一种磁盘驱动器，其包括盘，以及在盘上径向地致动的磁头。 产生表示第一加速度干扰的第一线性加速度信号，产生表示第二加速度干扰的第二线性加速度信号，并且生成表示热弹跳扰动的第三线性加速度信号。 第一线性加速度信号与第三线性加速度信号组合以产生表示组合的物理冲击扰动和热弹跳扰动的第四线性加速度信号。

公开(公告)号：US08885283B1

公开(公告)日：2014-11-11

申请号：US13288125

申请日：2011-11-03

申请人： Alain Chahwan ,  Jianguo Zhou ,  Wei Xi

发明人： Alain Chahwan ,  Jianguo Zhou ,  Wei Xi

IPC分类号： G11B21/02

CPC分类号： G11B19/042 ,  G11B5/5582

摘要： A disk drive is disclosed comprising a head actuated over a disk having a plurality of data tracks. A vibration is detected, and a write operation is configured to write a first plurality of blocks and a second plurality of blocks to a target data track based on the detected vibration. The first plurality of blocks are written to the target data track during a first revolution of the disk, and the second plurality of blocks are written to the target data track during a second revolution of the disk.

摘要翻译： 公开了一种磁盘驱动器，包括在具有多个数据磁道的盘上致动的磁头。 检测振动，并且写入操作被配置为基于检测到的振动将第一多个块和第二多个块写入目标数据轨道。 在盘的第一次旋转期间，将第一组多个块写入目标数据轨道，并且在盘的第二次旋转期间将第二多个块写入目标数据轨道。

公开(公告)号：US08922937B1

公开(公告)日：2014-12-30

申请号：US13451373

申请日：2012-04-19

申请人： Alain Chahwan ,  Orhan Beker ,  Chuanwen Ji

发明人： Alain Chahwan ,  Orhan Beker ,  Chuanwen Ji

IPC分类号： G11B21/02

CPC分类号： G11B19/042 ,  G11B5/59694

摘要： A disk drive is disclosed comprising a head actuated over a disk, and control circuitry including a vibration sensor. A position error signal (PES) is generated representing a radial location of the head over the disk, and the head is servoed radially over the disk in response to the PES. A first vibration signal is generated in response to the vibration sensor, and a second vibration signal in response to the PES. The first vibration signal is combined with the second vibration signal to generate a third vibration signal, and a vibration event is detected in response to the third vibration signal.

摘要翻译： 公开了一种磁盘驱动器，包括在盘上驱动的磁头，以及包括振动传感器的控制电路。 产生位置误差信号（PES），其表示头部在盘上的径向位置，并且头部响应于PES径向地盘绕在盘上。 响应于振动传感器产生第一振动信号，响应于PES产生第二振动信号。 第一振动信号与第二振动信号组合以产生第三振动信号，并且响应于第三振动信号检测振动事件。

公开(公告)号：US09009455B2

公开(公告)日：2015-04-14

申请号：US13099865

申请日：2011-05-03

申请人： Mingji Lou ,  Alain Chahwan

发明人： Mingji Lou ,  Alain Chahwan

IPC分类号： G06F9/00 ,  G06F9/24 ,  G06F15/177 ,  G11B19/04

CPC分类号： G11B19/048

摘要： A computer system is disclosed comprising a disk drive comprising a head stack assembly (HSA), the HSA comprising a spindle motor for rotating at least one disk, and at least one head actuated over the disk. The computer system further comprises a host coupled to the disk drive, wherein the host comprises a microprocessor operable to first boot the host by reading boot data from a secondary storage device. After first booting the host, the microprocessor commands the disk drive to accumulate performance data for the HSA, and after accumulating the performance data, the microprocessor second boots the host by reading boot data from the HSA.

摘要翻译： 公开了一种计算机系统，其包括磁盘驱动器，该磁盘驱动器包括磁头堆叠组件（HSA），所述HSA包括用于旋转至少一个磁盘的主轴电机以及在所述磁盘上致动的至少一个磁头。 所述计算机系统还包括耦合到所述磁盘驱动器的主机，其中所述主机包括可操作以通过从辅助存储设备读取引导数据来首先引导所述主机的微处理器。 在首次引导主机之后，微处理器命令磁盘驱动器累积HSA的性能数据，并且在累积性能数据之后，微处理器通过从HSA读取引导数据来第二次引导主机。

公开(公告)号：US08737013B2

公开(公告)日：2014-05-27

申请号：US13298241

申请日：2011-11-16

申请人： Jianguo Zhou ,  Wei Xi ,  Kuang-Yang Tu ,  Alain Chahwan

发明人： Jianguo Zhou ,  Wei Xi ,  Kuang-Yang Tu ,  Alain Chahwan

IPC分类号： G11B5/596

CPC分类号： G11B5/59694

摘要： A disk drive is disclosed comprising a disk, a head, and control circuitry comprising a servo control system operable to actuate the head over the disk. A plurality of disturbance signals is generated in response to a vibration. A plurality of correlations is generated in response to each disturbance signal and an error signal of the servo control system. At least one of the disturbance signals is selected in response to the correlations. A feed-forward compensation value is generated in response to the selected disturbance signal, and the feed-forward compensation value is applied to the servo control system to compensate for the vibration.

摘要翻译： 公开了一种磁盘驱动器，其包括磁盘，磁头和控制电路，其包括可操作以在磁盘上致动磁头的伺服控制系统。 响应于振动产生多个干扰信号。 响应于每个干扰信号和伺服控制系统的误差信号产生多个相关。 响应于相关性来选择至少一个干扰信号。 响应于所选择的干扰信号产生前馈补偿值，并且将前馈补偿值应用于伺服控制系统以补偿振动。