公开(公告)号：US06862155B2

公开(公告)日：2005-03-01

申请号：US10401358

申请日：2003-03-26

申请人： Yong Y. Yang ,  Qiang Bi ,  Xiong Liu ,  ChoonKiat Lim

发明人： Yong Y. Yang ,  Qiang Bi ,  Xiong Liu ,  ChoonKiat Lim

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B19/045

摘要： Position error values are obtained from a transducer head while following a plurality of servo tracks with a servo loop that band-blocks a frequency range that includes F, a nominal rotation frequency. An estimated difference distribution is derived from the position error values, the difference distribution having a first frequency component at a positive frequency ≦2*F. A scalar track squeeze magnitude indicator is derived from the estimated difference distribution so that the indicator to be transmitted depends on the frequency component.

摘要翻译： 位置误差值是从一个换能器头获得的，同时跟随一个伺服回路的多个伺服轨道，该伺服回路对包括F的标称旋转频率的频率范围进行带阻。 从位置误差值导出估计的差分布，差分分布具有正频率<= 2 * F的第一频率分量。 从估计的差分分布导出标量轨迹挤压幅度指示符，使得要发送的指示符取决于频率分量。

公开(公告)号：US06438431B1

公开(公告)日：2002-08-20

申请号：US09133161

申请日：1998-08-12

申请人： Qing-Guo Wang ,  Chang Chieh Hang ,  Qiang Bi

发明人： Qing-Guo Wang ,  Chang Chieh Hang ,  Qiang Bi

IPC分类号： G05B1302

CPC分类号： G05B13/042

摘要： Briefly, a preferred embodiment of the present invention includes an apparatus for tuning a regulator in a process controller. The digitized output from a standard relay and a parasitic relay are fed through digital to analog converter providing signals at 0.5&ohgr;c, &ohgr;c and 1.5&ohgr;c to the process, where &ohgr;c is the process critical frequency. The apparatus records the digitized relay output u′ and the digitized process output y′ until stationary oscillations are reached. The outputs u′ and y′ are then used to calculate the process frequency response at 0.50&ohgr;c, &ohgr;c and 1.5&ohgr;c. This data is then used to design the regulator, the output of which is converted to analog form and inputted to control the process.

摘要翻译： 简而言之，本发明的一个优选实施例包括用于调整过程控制器中的调节器的装置。 标准继电器和寄生继电器的数字化输出通过数字到模拟转换器提供，以0.5megac，ωgac和1.5omegac提供信号，其中omegac是过程临界频率。 该装置记录数字化继电器输出u'和数字化处理输出y'，直到达到稳定振荡。 然后输出u'和y'用于计算0.50omegac，ωgac和1.5omegac处理频率响应。 然后将该数据用于设计调节器，其输出转换为模拟形式并输入以控制过程。

公开(公告)号：US06317285B1

公开(公告)日：2001-11-13

申请号：US09697002

申请日：2000-10-26

申请人： Qiang Bi ,  Kevin Arthur Gomez ,  Jimmy Tze Ming Pang ,  Stephen Kow Chiew Kuan ,  MengEng Lye ,  BengSee Lim

发明人： Qiang Bi ,  Kevin Arthur Gomez ,  Jimmy Tze Ming Pang ,  Stephen Kow Chiew Kuan ,  MengEng Lye ,  BengSee Lim

IPC分类号： G11B5455

CPC分类号： G11B5/59683 ,  G11B5/012 ,  G11B5/5534 ,  G11B5/59644 ,  G11B7/0945

摘要： A method of calibrating magnetoresistive (MR) head geometry for a product head in a selfservo writing disc drive includes the steps of writing a first burst at an inner diameter of a disc surface using the write head of the product head. Next, the first burst is read using the MR read head of the product head, and a first read amplitude of the first burst is determined. From the first read amplitude of the first burst, it is determined which one of a multiple different sets of subsequent inner diameter steps to perform. Then, the one of the multiple different sets of subsequent inner diameter steps is performed to determine a read head width, a write head width, and a read-write offset between the read head and the write head.

摘要翻译： 在自写入盘驱动器中用于校准磁头（MR）头几何形状的方法包括以下步骤：使用产品头的写入头在盘表面的内径处写入第一脉冲串。 接下来，使用产品头的MR读取头读取第一个突发，并确定第一个突发的第一个读取幅度。 从第一脉冲串的第一读取幅度开始，确定执行多个不同组的后续内径步骤中的哪一个。 然后，执行多个不同组的后续内径步骤中的一个，以确定读头和写头之间的读头宽度，写头宽度和读 - 写偏移。

公开(公告)号：US07349174B2

公开(公告)日：2008-03-25

申请号：US10143137

申请日：2002-05-09

申请人： Qiang Bi ,  Xiong Liu ,  LeeLing Tan ,  Wen-Jun Cao ,  ChoonKiat Lim

发明人： Qiang Bi ,  Xiong Liu ,  LeeLing Tan ,  Wen-Jun Cao ,  ChoonKiat Lim

IPC分类号： G11B5/596

CPC分类号： G11B27/36 ,  G11B19/04 ,  G11B2220/20

摘要： A method of preventing a write operation to a disc in a disc drive during a shock event without the use of a separate shock sensor comprises steps of monitoring an actuator voice coil motor (VCM) control plant output signal, generating an actuator voice coil motor (VCM) plant model module output signal, comparing the VCM plant model module output signal to the VCM control plant module output signal to produce a difference signal, and triggering a write protect gate if the difference signal exceeds a predetermined threshold value. The system comprises a voice coil motor (VCM) control plant module sensitive to a shock event providing a VCM control plant module output, a voice coil motor (VCM) plant model module initially insensitive to the shock event producing a VCM plant model module output, a first comparator module coupled to receive the VCM control plant module output and the VCM plant model module output, operable to generate a difference signal between the model plant module output and the VCM control plant module output, and a triggering module receiving the difference signal for generating a write protect gate signal if the difference signal exceeds a predetermined shock threshold.

摘要翻译： 一种在不使用单独的冲击传感器的情况下防止在磁盘驱动器中对盘的写入操作的方法包括以下步骤：监视致动器音圈电机（VCM）控制电路输出信号，产生致动器音圈电机 VCM）工厂模块模块输出信号，将VCM工厂模块模块输出信号与VCM控制站模块输出信号进行比较，产生差分信号，如果差分信号超过预定阈值则触发写保护门。 该系统包括对提供VCM控制工厂模块输出的冲击事件敏感的音圈电机（VCM）控制工厂模块，对产生VCM工厂模块模块输出的冲击事件最初不敏感的音圈电机（VCM）工厂模型模块， 第一比较器模块，其耦合以接收VCM控制工厂模块输出和VCM工厂模块模块输出，可操作以在模型工厂模块输出和VCM控制工厂模块输出之间产生差分信号;以及触发模块，其接收差分信号 如果差分信号超过预定的冲击阈值，则产生写保护门信号。

公开(公告)号：US07054094B2

公开(公告)日：2006-05-30

申请号：US09896895

申请日：2001-06-29

申请人： Tao Zhang ,  Kevin Arthur Gomez ,  Qiang Bi ,  MingZhong Ding ,  Stephen Kow Chiew Kuan

发明人： Tao Zhang ,  Kevin Arthur Gomez ,  Qiang Bi ,  MingZhong Ding ,  Stephen Kow Chiew Kuan

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/59627 ,  G11B5/59611 ,  G11B21/21

摘要： An apparatus and method for improving servo loop performance in a disc drive storage system are provided. The servo loop includes a voice coil motor actuator that moves the head in response to a received servo control signal. A sensor, located in the head, senses servo information located on the disc and produces a servo signal therefrom. The servo signal is combined with a reference signal to produce a position error signal. A servo controller receives the position error signal and responsively produces the servo control signal. The servo controller includes a drive signal generator that receives the position error signal and responsively produces a driving energy signal. A vibration damping circuit receives the driving energy signal and responsively produces the servo control signal. A real-time adaptive loop shaping circuit, included in the servo loop, detects vibrations in the position error signal and responsively adjusts at least one parameter of a transfer function of the vibration damping circuit to reduce vibrations at different frequencies in the driving energy signal.

公开(公告)号：US20050185319A1

公开(公告)日：2005-08-25

申请号：US10785628

申请日：2004-02-24

申请人： Xiong Liu ,  Qiang Bi ,  TzeMing Pang ,  ChoonKiat Lim

发明人： Xiong Liu ,  Qiang Bi ,  TzeMing Pang ,  ChoonKiat Lim

IPC分类号： G11B5/596

CPC分类号： G11B5/59605 ,  G11B19/045

摘要： A method and apparatus for compensating for errors in servo systems. An improved zero acceleration path (ZAP) correction technique is provided, wherein selected tracks of a data storage device are used for ZAP processing in order to reduce the overall time required to perform error compensation for a storage device. For a given selected track to be ZAPed, track profiles of adjoining tracks are used in addition to the track profile of the selected track as part of the ZAP correction determination for the selected track. Using adjacent track profiles as part of the ZAP correction determination assists in mitigating AC track squeeze issues that would otherwise occur when performing selective track ZAPing.

摘要翻译： 一种补偿伺服系统误差的方法和装置。 提供了一种改进的零加速路径（ZAP）校正技术，其中数据存储设备的选定轨道用于ZAP处理，以便减少对存储设备进行错误补偿所需的总体时间。 对于给定的所选轨道要ZAPed，除了所选轨道的轨道轮廓之外，还使用相邻轨道的轨道轮廓，作为所选轨道的ZAP校正确定的一部分。 使用相邻轨道配置文件作为ZAP校正确定的一部分有助于减轻执行选择性跟踪ZAPing时会发生的AC轨道挤压问题。

公开(公告)号：US06765744B2

公开(公告)日：2004-07-20

申请号：US10028636

申请日：2001-12-19

申请人： Kevin Arthur Gomez ,  Qiang Bi ,  Aik Chuan Lim ,  Jimmy Tze Ming Pang

发明人： Kevin Arthur Gomez ,  Qiang Bi ,  Aik Chuan Lim ,  Jimmy Tze Ming Pang

IPC分类号： G11B2102

CPC分类号： G11B5/59611

摘要： A method of, apparatus for, and means for controlling pitch of a servowritten track on a disc in a disc drive are disclosed. The disc drive has a head for traversing over a surface of the disc. The head has a read element and a write element separated by a head element offset &Dgr;. A servowriting controller operably connected to the disc drive creates a track k by writing servo information on the disc. The servowriting controller then calculates the head element offset &Dgr; at the track k, [&Dgr;CALC(k)] and determines a skew angle &thgr; at the track k, [&thgr;(k)]. The servowriting controller adjusts a track pitch correction factor based on the &Dgr;CALC(K) and the &thgr;(k) such that the track pitch correction factor is utilized to servowrite a next track.

摘要翻译： 公开了一种用于控制盘驱动器中的盘上的伺服轨道的俯仰的方法，装置和装置。 磁盘驱动器具有用于在盘的表面上移动的磁头。 头部具有读取元素和由头元素偏移量Delta分隔的写入元素。 可操作地连接到盘驱动器的伺服驱动控制器通过在盘上写入伺服信息来创建轨迹k。 伺服驱动控制器然后计算磁道k处的磁头元素偏移量Delta（ΔCALC（k）]，并确定轨道k处的偏斜角θ，θ（k）]。 伺服驱动控制器基于DeltaCALC（K）和θ（k）来调整轨道间距校正因子，使得轨道间距校正因子用于对下一个轨道进行编译。

公开(公告)号：US07457075B2

公开(公告)日：2008-11-25

申请号：US10785628

申请日：2004-02-24

申请人： Xiong Liu ,  Qiang Bi ,  TzeMing Jimmy Pang ,  ChoonKiat Lim

发明人： Xiong Liu ,  Qiang Bi ,  TzeMing Jimmy Pang ,  ChoonKiat Lim

IPC分类号： G11B5/596

CPC分类号： G11B5/59605 ,  G11B19/045

摘要： A method and apparatus for compensating for errors in servo systems. An improved zero acceleration path (ZAP) correction technique is provided, wherein selected tracks of a data storage device are used for ZAP processing in order to reduce the overall time required to perform error compensation for a storage device. For a given selected track to be ZAPed, track profiles of adjoining tracks are used in addition to the track profile of the selected track as part of the ZAP correction determination for the selected track. Using adjacent track profiles as part of the ZAP correction determination assists in mitigating AC track squeeze issues that would otherwise occur when performing selective track ZAPing.

摘要翻译： 一种补偿伺服系统误差的方法和装置。 提供了一种改进的零加速路径（ZAP）校正技术，其中数据存储设备的选定轨道用于ZAP处理，以便减少对存储设备进行错误补偿所需的总体时间。 对于给定的所选轨道要ZAPed，除了所选轨道的轨道轮廓之外，还使用相邻轨道的轨道轮廓，作为所选轨道的ZAP校正确定的一部分。 使用相邻轨道配置文件作为ZAP校正确定的一部分有助于减轻执行选择性跟踪ZAPing时会发生的AC轨道挤压问题。

公开(公告)号：US06751042B2

公开(公告)日：2004-06-15

申请号：US09896491

申请日：2001-06-29

申请人： Qiang Bi ,  Kevin Arthur Gomez ,  Jimmy TzeMing Pang ,  Gabor Szita

发明人： Qiang Bi ,  Kevin Arthur Gomez ,  Jimmy TzeMing Pang ,  Gabor Szita

IPC分类号： G11B5596

CPC分类号： G11B5/59611 ,  G11B5/012

摘要： Many parallel tracks on a storage surface of a data handling device are arranged in a longitudinal direction. Each track has a track center comprising reference points for fine lateral positioning. Each successive pair of track centers has a succession of lateral offset distance having an average. Because there are many successive pairs of tracks, there are many average lateral offset distances defining a statistical distribution having a variance. The device includes a laterally movable transducer head and a longitudinally movable data surface. A signal is received from the transducer head while the data surface moves past the head. Many values each indicative of a lateral offset distance between a corresponding pair of lateral reference points are derived from the received signal. These offset-indicative values are used to shift at least some of the latitudinal reference points laterally so as to reduce this variance.

摘要翻译： 在数据处理装置的存储表面上的许多平行轨迹沿纵向布置。 每个轨道具有包括用于精细横向定位的参考点的轨道中心。 每个连续的一对轨道中心具有平均的横向偏移距离的连续。 由于存在许多连续的轨道对，所以有许多平均横向偏移距离限定了具有方差的统计分布。该装置包括横向可移动的换能器头和纵向可移动的数据表面。 当数据表面移动通过头部时，从换能器头部接收信号。 从接收到的信号导出许多指示相应的一对横向参考点之间的横向偏移距离的值。 这些偏移指示值用于横向移动至少一些纬度参考点，以便减小该方差。

公开(公告)号：US06693763B2

公开(公告)日：2004-02-17

申请号：US09895666

申请日：2001-06-28

申请人： Qiang Bi ,  Jimmy TzeMing Pang ,  Kevin Arthur Gomez

发明人： Qiang Bi ,  Jimmy TzeMing Pang ,  Kevin Arthur Gomez

IPC分类号： G11B5596

CPC分类号： G11B21/106 ,  G11B5/5552

摘要： Linearizing hysteresis of a microactuator for a disc drive by modeling the microactuator with a first polynomial equation to provide a linear displacement response of the microactuator responding to an applied voltage, deriving a set of constants from a plurality of burst patterns for use with the first polynomial equation to provide a set of variables for use in resolving the second polynomial equation to provide a set of equations from which a set of constants can be derived for use by the second polynomial equation to provide a voltage to the microactuator to displace the microactuator by a predetermined incremental distance.

摘要翻译： 通过用第一多项式方程建模微致动器来对磁盘驱动器的微致动器进行线性化滞后，以提供响应于所施加的电压的微致动器的线性位移响应，从多个突发模式中导出与第一多项式一起使用的一组常数 方程式提供用于解析第二多项式方程式的一组变量，以提供一组方程式，从该组方程可以导出一组常数以供第二多项式方程使用，以向微致动器提供电压以将微致动器置换为微致动器 预定的增量距离。