公开(公告)号：US20100067357A1

公开(公告)日：2010-03-18

申请号：US12211569

申请日：2008-09-16

申请人： Fu-Ying Huang ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Fu-Ying Huang ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B17/00

CPC分类号： G11B5/5582 ,  G11B5/59627

摘要： A disk drive and a method for operating the disk drive compensates for rotational vibration (RV) by adaptively modifying the gains of two separate linear vibration sensors so the sensor gains are optimal under any given condition. The two sensors provide two signals S1, S2, respectively, to the disk drive's servo control processor that generates the control signal to the voice coil motor (VCM) actuator that controls the positioning of the read/write head. The processor uses S1, S2 and the head position error signal (PES) as inputs to run an adaptive RV feedforward (RVFF) algorithm. The adaptive RVFF algorithm takes the PES and sensor outputs S1 and S2 as inputs, mathematically determines the required correction to the sensor gain factors k1 and k2, respectively, and then adjusts the gain factors k1 and k2 accordingly. Each signal S1, S2 is then modified by its adjusted gain factor k1, k2, respectively. The difference in the modified S1, S2 signals is the RVFF signal that is summed with the control signal to generate the RV-compensated control signal to the VCM actuator.

摘要翻译： 磁盘驱动器和用于操作磁盘驱动器的方法通过自适应地修改两个单独的线性振动传感器的增益来补偿旋转振动（RV），使得传感器增益在任何给定条件下是最佳的。 两个传感器分别向磁盘驱动器的伺服控制处理器提供两个信号S1，S2，该伺服控制处理器产生对控制读/写头定位的音圈电机（VCM）致动器的控制信号。 处理器使用S1，S2和头位置误差信号（PES）作为输入来运行自适应RV前馈（RVFF）算法。 自适应RVFF算法将PES和传感器输出S1和S2作为输入，分别数学地确定传感器增益因子k1和k2所需的校正，然后相应地调整增益因子k1和k2。 然后，通过其调整的增益因子k1，k2来修改每个信号S1，S2。 修改后的S1，S2信号的差异是将RVFF信号与控制信号相加，以产生向VCM致动器的RV补偿的控制信号。

公开(公告)号：US08379342B2

公开(公告)日：2013-02-19

申请号：US12211569

申请日：2008-09-16

申请人： Fu-Ying Huang ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Fu-Ying Huang ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/59627

摘要： A disk drive and a method for operating the disk drive compensates for rotational vibration (RV) by adaptively modifying the gains of two separate linear vibration sensors so the sensor gains are optimal under any given condition. The two sensors provide two signals S1, S2, respectively, to the disk drive's servo control processor that generates the control signal to the voice coil motor (VCM) actuator that controls the positioning of the read/write head. The processor uses S1, S2 and the head position error signal (PES) as inputs to run an adaptive RV feedforward (RVFF) algorithm. The adaptive RVFF algorithm takes the PES and sensor outputs S1 and S2 as inputs, mathematically determines the required correction to the sensor gain factors k1 and k2, respectively, and then adjusts the gain factors k1 and k2 accordingly. Each signal S1, S2 is then modified by its adjusted gain factor k1, k2, respectively. The difference in the modified S1, S2 signals is the RVFF signal that is summed with the control signal to generate the RV-compensated control signal to the VCM actuator.

摘要翻译： 磁盘驱动器和用于操作磁盘驱动器的方法通过自适应地修改两个单独的线性振动传感器的增益来补偿旋转振动（RV），使得传感器增益在任何给定条件下是最佳的。 两个传感器分别向磁盘驱动器的伺服控制处理器提供两个信号S1，S2，该伺服控制处理器产生对控制读/写头定位的音圈电机（VCM）致动器的控制信号。 处理器使用S1，S2和头位置误差信号（PES）作为输入来运行自适应RV前馈（RVFF）算法。 自适应RVFF算法将PES和传感器输出S1和S2作为输入，分别在传感器增益因子k1和k2上数学确定所需的校正，然后相应地调整增益因子k1和k2。 然后，通过其调整的增益因子k1，k2来修改每个信号S1，S2。 修改后的S1，S2信号的差异是将RVFF信号与控制信号相加，以产生向VCM致动器的RV补偿的控制信号。

公开(公告)号：US07277258B2

公开(公告)日：2007-10-02

申请号：US11158445

申请日：2005-06-21

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B5/596 ,  G11B21/10 ,  G11B21/20

CPC分类号： G11B5/5552

摘要： A dual-stage actuator disk drive has both a rotary primary actuator and a rotary secondary actuator. When the primary actuator initiates a seek there are two torque components acting on the center of mass of the secondary actuator's moving portion. The center of rotation of the moving portion is located at an optimal location relative to the center of mass of the moving portion, which results in cancellation of the two torque components and a secondary actuator that has essentially no resonant frequency in response to a seek by the primary actuator. If the optimal location can not be achieved because of assembly tolerances, then the center of rotation is placed at a distance at least as great as the assembly tolerance from the optimal location.

摘要翻译： 双级致动器盘驱动器具有旋转主执行器和旋转次级致动器。 当主执行器启动寻道时，存在作用在辅助致动器的移动部分的质心的两个扭矩分量。 移动部分的旋转中心位于相对于移动部分的质心的最佳位置，这导致两个扭矩分量的消除，以及二次致动器，其基本上没有响应于寻道的共振频率 主执行器。 如果由于组装公差而无法实现最佳位置，则旋转中心的距离至少与最佳位置的组装公差一样大。

公开(公告)号：US08699165B2

公开(公告)日：2014-04-15

申请号：US12827752

申请日：2010-06-30

申请人： Lidu Huang ,  Fu-Ying Huang ,  Tetsuo Semba

发明人： Lidu Huang ,  Fu-Ying Huang ,  Tetsuo Semba

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/5565 ,  G11B33/144

摘要： A HDD comprising a temperature sensor disposed inside the HDD configured to periodically measure temperature inside of said hard disk drive; a magnetic disk; a read head; a write head; memory for storing RWO data. The RWO data is a function of a distance between the read head and the write head. The HDD also includes a RWO data adjustor configured to adjust the RWO data in response to a change in temperature of the HDD to compensate for a change in the distance between the read head and the write head based on the change in temperature.

摘要翻译： 一种HDD，包括设置在所述HDD内部的温度传感器，所述温度传感器被配置为周期性地测量所述硬盘驱动器 磁盘 读头; 写头; 用于存储RWO数据的存储器。 RWO数据是读取头和写入头之间的距离的函数。 HDD还包括RWO数据调整器，其被配置为响应于HDD的温度变化来调整RWO数据，以补偿基于温度变化的读取头和写入头之间的距离的变化。

公开(公告)号：US20060285256A1

公开(公告)日：2006-12-21

申请号：US11158445

申请日：2005-06-21

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew White

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba ,  Matthew White

IPC分类号： G11B5/56

CPC分类号： G11B5/5552

摘要： A dual-stage actuator disk drive has both a rotary primary actuator and a rotary secondary actuator. When the primary actuator initiates a seek there are two torque components acting on the center of mass of the secondary actuator's moving portion. The center of rotation of the moving portion is located at an optimal location relative to the center of mass of the moving portion, which results in cancellation of the two torque components and a secondary actuator that has essentially no resonant frequency in response to a seek by the primary actuator. If the optimal location can not be achieved because of assembly tolerances, then the center of rotation is placed at a distance at least as great as the assembly tolerance from the optimal location.

摘要翻译： 双级致动器盘驱动器具有旋转主执行器和旋转次级致动器。 当主执行器启动寻道时，存在作用在辅助致动器的移动部分的质心的两个扭矩分量。 移动部分的旋转中心位于相对于移动部分的质心的最佳位置，这导致两个扭矩分量的消除，以及二次致动器，其基本上没有响应于寻道的共振频率 主执行器。 如果由于组装公差而无法实现最佳位置，则旋转中心的距离至少与最佳位置的组装公差一样大。

公开(公告)号：US07145746B1

公开(公告)日：2006-12-05

申请号：US11279763

申请日：2006-04-14

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/5582 ,  G11B5/59622

摘要： A disk drive, such as a magnetic recording hard disk drive, has a head positioning servo control system that includes an improved repetitive controller included with the conventional feedback controller for suppressing periodic disturbances. The repetitive controller includes a low-pass filter (LPF) and a time-delay memory with a time delay matched to the period of the periodic disturbance. In a digital implementation, where the head position error signal (PES) is sampled, the time delay is the time for N samples. A subsequent PES sample is summed with the time-delay input sample from N samples earlier and this summed value is input to the LPF. The output of the LPF is added to the subsequent PES sample and the added value is input to the feedback controller. The value of N is adjustable, so the repetitive controller is adaptable to changes in frequency of the periodic disturbance.

摘要翻译： 诸如磁记录硬盘驱动器的磁盘驱动器具有头定位伺服控制系统，其包括用于抑制周期性干扰的常规反馈控制器所包括的改进的重复控制器。 重复控制器包括低通滤波器（LPF）和具有与周期性干扰周期匹配的时间延迟的时间延迟存储器。 在头位置误差信号（PES）被采样的数字实现中，时间延迟是N个采样的时间。 随后的PES样本与来自N个样本的时间延迟输入样本相加，并将该求和值输入到LPF。 将LPF的输出添加到随后的PES样本中，并将附加值输入到反馈控制器。 N值可调，因此重复控制器适应周期性扰动频率的变化。

公开(公告)号：US20120002314A1

公开(公告)日：2012-01-05

申请号：US12827752

申请日：2010-06-30

申请人： Lidu Huang ,  Fu-Ying Huang ,  Tetsuo Semba

发明人： Lidu Huang ,  Fu-Ying Huang ,  Tetsuo Semba

IPC分类号： G11B27/36 ,  G11B33/14

CPC分类号： G11B5/59627 ,  G11B5/5565 ,  G11B33/144

摘要： A HDD comprising a temperature sensor disposed inside the HDD configured to periodically measure temperature inside of said hard disk drive; a magnetic disk; a read head; a write head; memory for storing RWO data. The RWO data is a function of a distance between the read head and the write head. The HDD also includes a RWO data adjustor configured to adjust the RWO data in response to a change in temperature of the HDD to compensate for a change in the distance between the read head and the write head based on the change in temperature.

摘要翻译： 一种HDD，包括设置在所述HDD内部的温度传感器，所述温度传感器被配置为周期性地测量所述硬盘驱动器内部的温度; 磁盘 读头; 写头; 用于存储RWO数据的存储器。 RWO数据是读取头和写入头之间的距离的函数。 HDD还包括RWO数据调整器，其被配置为响应于HDD的温度变化来调整RWO数据，以补偿基于温度变化的读取头和写入头之间的距离的变化。

公开(公告)号：US06614613B1

公开(公告)日：2003-09-02

申请号：US09526261

申请日：2000-03-16

申请人： Fu-Ying Huang ,  Naoyuki Kagami ,  Tetsuo Semba ,  Eiji Soga ,  Shingo Tsuda

发明人： Fu-Ying Huang ,  Naoyuki Kagami ,  Tetsuo Semba ,  Eiji Soga ,  Shingo Tsuda

IPC分类号： G11B2110

CPC分类号： G05D19/02 ,  G11B5/10 ,  G11B5/5582 ,  G11B5/59627

摘要： An active control mechanism and method for stabilizing a servo-controlled actuator system such as an actuator system in a data recording disk drive by compensating the vibrational modes of the actuator's arm assembly. The control mechanism has a sensing arrangement which can include one or more individual sensors attached to the actuator at locations where they generate signals in phase with the vibrational modes, and especially with all the low-frequency major vibrational modes, of the arm assembly. A control mechanism derives from the signals an adjustment signal consisting of three corrective terms—a stiffening correction, an active damping correction, and an inertia correction by a phase correction. Furthermore, high-frequency out-of-phase modes can be stabilized by appropriately shifting the phase of the signals. The adjustment signal is used in the feedback control loop to stabilize the actuator system.

摘要翻译： 一种主动控制机构和方法，用于通过补偿致动器臂组件的振动模式来稳定伺服控制致动器系统，例如数据记录盘驱动器中的致动器系统。 控制机构具有感测装置，其可以包括一个或多个单独的传感器，其附接到致动器的位置，在那里它们与臂组件的振动模式，特别是与所有低频主要振动模式相同地产生信号。 控制机构从信号中获得由三个校正项组成的调整信号 - 加强校正，主动阻尼校正和通过相位校正的惯性校正。 此外，可以通过适当地移位信号的相位来稳定高频异相模式。 调节信号用于反馈控制回路以稳定执行器系统。

公开(公告)号：US08665549B2

公开(公告)日：2014-03-04

申请号：US13249041

申请日：2011-09-29

申请人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B21/02 ,  G11B5/82

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： A magnetic data storage system having a magnetic disk having burst patterns for providing a position error signal (PES) wherein each magnetic burst pattern is offset from an adjacent burst pattern by ¼ track pitch. All of the magnetic bits of the burst patterns can be unipolar magnetized, and the bits of each burst pattern can be aligned with one another in radial and circumferential direction. The magnetic media can be a bit patterned media wherein the magnetic bits of the burst patterns are magnetically isolated portions separated by non-magnetic spaces or non-magnetic material.

摘要翻译： 一种磁数据存储系统，具有具有用于提供位置误差信号（PES）的脉冲串模式的磁盘，其中每个磁脉冲串模式从相邻脉冲串模式偏移1/4声道间距。 突发图案的所有磁位可以是单极磁化的，并且每个突发图案的位可以在径向和圆周方向上彼此对准。 磁介质可以是位图形介质，其中突发图案的磁位是被非磁性空间或非磁性材料隔开的磁隔离部分。

公开(公告)号：US20130083420A1

公开(公告)日：2013-04-04

申请号：US13249041

申请日：2011-09-29

申请人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B15/52 ,  G11B5/82

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： A magnetic data storage system having a magnetic disk having burst patterns for providing a position error signal (PES) wherein each magnetic burst pattern is offset from an adjacent burst pattern by ¼ track pitch. All of the magnetic bits of the burst patterns can be unipolar magnetized, and the bits of each burst pattern can be aligned with one another in radial and circumferential direction. The magnetic media can be a bit patterned media wherein the magnetic bits of the burst patterns are magnetically isolated portions separated by non-magnetic spaces or non-magnetic material.

摘要翻译： 一种磁数据存储系统，具有具有用于提供位置误差信号（PES）的脉冲串模式的磁盘，其中每个磁脉冲串模式从相邻脉冲串模式偏移1/4声道间距。 突发图案的所有磁位可以是单极磁化的，并且每个突发图案的位可以在径向和圆周方向上彼此对准。 磁介质可以是位图形介质，其中突发图案的磁位是被非磁性空间或非磁性材料隔开的磁隔离部分。