公开(公告)号：US07872827B2

公开(公告)日：2011-01-18

申请号：US11829723

申请日：2007-07-27

申请人： JiaHong Shu ,  TzeMing Jimmy Pang ,  WeiSung Lee ,  KianKeong Ooi ,  KianSoon Yeo ,  Xiong Liu

发明人： JiaHong Shu ,  TzeMing Jimmy Pang ,  WeiSung Lee ,  KianKeong Ooi ,  KianSoon Yeo ,  Xiong Liu

IPC分类号： G11B21/02

CPC分类号： G11B19/043 ,  G11B19/042 ,  G11B21/12 ,  G11B21/22

摘要： Various embodiments of the present invention are generally directed to protecting a device from damage due to an impact event at the conclusion of a free fall condition through the use of a biasing signal that maintains a retention force until the impact event is completed.

摘要翻译： 本发明的各种实施例总体上旨在通过使用维持保持力直到撞击事件完成的偏置信号来保护装置免受在自由落体状态结束时的冲击事件的损害。

公开(公告)号：US20090027798A1

公开(公告)日：2009-01-29

申请号：US11829723

申请日：2007-07-27

申请人： JiaHong Shu ,  TzeMing Jimmy Pang ,  WeiSung Lee ,  KianKeong Ooi ,  KianSoon Yeo ,  Xiong Liu

发明人： JiaHong Shu ,  TzeMing Jimmy Pang ,  WeiSung Lee ,  KianKeong Ooi ,  KianSoon Yeo ,  Xiong Liu

IPC分类号： G11B21/02

CPC分类号： G11B19/043 ,  G11B19/042 ,  G11B21/12 ,  G11B21/22

摘要： Various embodiments of the present invention are generally directed to protecting a device from damage due to an impact event at the conclusion of a free fall condition through the use of a biasing signal that maintains a retention force until the impact event is completed.

摘要翻译： 本发明的各种实施例总体上旨在通过使用维持保持力直到冲击事件完成的偏置信号来保护装置免受在自由落体状态结束时的冲击事件的损害。

公开(公告)号：US07242546B2

公开(公告)日：2007-07-10

申请号：US10685076

申请日：2003-10-13

申请人： KianKeong Ooi ,  WingKong Chiang ,  MingZhong Ding ,  WeiSung Lee ,  EikFun Khor ,  BengWee Quak

发明人： KianKeong Ooi ,  WingKong Chiang ,  MingZhong Ding ,  WeiSung Lee ,  EikFun Khor ,  BengWee Quak

IPC分类号： G11B5/09

CPC分类号： G11B27/3027 ,  G11B20/1403 ,  G11B27/105 ,  G11B2220/20

摘要： A location within a cycle is determined by reading a portion of a cyclic bit sequence, the bit sequence containing several interspersed bit-group sets that each contain a plurality of series that each consist of several consecutively-placed identical bit-groups. On a data surface in a disc drive, each bit group can be stored and accessed in unused bits of each servo sector's digital portion.

摘要翻译： 通过读取循环比特序列的一部分来确定周期内的位置，该比特序列包含几个散布的比特组集合，每个包含多个序列，每个包含多个由几个连续放置的相同比特组组成的序列。 在磁盘驱动器的数据表面上，可以在每个伺服扇区的数字部分的未使用位中存储和访问每个位组。

公开(公告)号：US06882497B2

公开(公告)日：2005-04-19

申请号：US10090875

申请日：2002-03-04

申请人： ShuangQuan Min ,  KianKeong Ooi ,  WeiSung Lee ,  WingKong Chiang

发明人： ShuangQuan Min ,  KianKeong Ooi ,  WeiSung Lee ,  WingKong Chiang

IPC分类号： G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59655

摘要： Track closure errors written into servo sectors of an information track of a disc of a disc drive are resolved from a position control signal generated by a servo control circuit of a data storage device by steps comprising: determining a value for the track closure error from a position error signal, establishing a track closure profile based on the value of the track closure error, and injecting the track profile into the servo control circuit as a feed forward compensation input for the position error signal to resolve the track closure error from the position control signal.

摘要翻译： 通过以下步骤由数据存储装置的伺服控制电路产生的位置控制信号来解析写入盘驱动器的盘的信息轨道的伺服扇区的跟踪闭合误差，包括：从一个 位置误差信号，基于轨道闭合误差的值建立​​轨道闭合轮廓，以及将轨道轮廓注入伺服控制电路作为用于位置误差信号的前馈补偿输入，以从位置控制中解决轨道闭合误差 信号。

公开(公告)号：US20050078396A1

公开(公告)日：2005-04-14

申请号：US10685076

申请日：2003-10-13

申请人： KianKeong Ooi ,  WingKong Chiang ,  MingZhong Ding ,  WeiSung Lee ,  EikFun Khor ,  BengWee Quak

发明人： KianKeong Ooi ,  WingKong Chiang ,  MingZhong Ding ,  WeiSung Lee ,  EikFun Khor ,  BengWee Quak

IPC分类号： G11B20/14 ,  G11B27/10 ,  G11B27/30 ,  G11B5/09 ,  G11B5/596

CPC分类号： G11B27/3027 ,  G11B20/1403 ,  G11B27/105 ,  G11B2220/20

摘要： A location within a cycle is determined by reading a portion of a cyclic bit sequence, the bit sequence containing several interspersed bit-group sets that each contain a plurality of series that each consist of several consecutively-placed identical bit-groups. On a data surface in a disc drive, each bit group can be stored and accessed in unused bits of each servo sector's digital portion.

摘要翻译： 通过读取循环比特序列的一部分来确定周期内的位置，该比特序列包含几个散布的比特组集合，每个包含多个序列，每个包含多个由几个连续放置的相同比特组组成的系列。 在磁盘驱动器的数据表面上，可以在每个伺服扇区的数字部分的未使用位中存储和访问每个位组。

公开(公告)号：US06654198B2

公开(公告)日：2003-11-25

申请号：US09885008

申请日：2001-06-19

申请人： Xiong Liu ,  Kian Keong Ooi ,  ChoonKiat Lim ,  Yangquan Chen ,  Qiang Bi ,  Mingzhong Ding ,  ShuangQuan Min ,  WeiSung Lee

发明人： Xiong Liu ,  Kian Keong Ooi ,  ChoonKiat Lim ,  Yangquan Chen ,  Qiang Bi ,  Mingzhong Ding ,  ShuangQuan Min ,  WeiSung Lee

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： Steps for isolating and correcting total written-in repeatable run-out error written into servo sectors of a disc drive include, determining a total repeatable run-out error value for each servo sector, isolating a repeatable error value component of the total written-in repeatable run-out error value for each servo sector, removing the repeatable error value component from total written-in repeatable run-out error value to provide a non-repeatable error value component of the total written-in repeatable run-out error value for each servo sector, providing both the repeatable and non-repeatable error value components to a processor for generation of compensation signals, and applying the compensation signals into a servo control circuit of control loop of the disc drive using compensation circuits to compensate for each component of the total written-in repeatable run-out error.

公开(公告)号：US06785073B2

公开(公告)日：2004-08-31

申请号：US09844192

申请日：2001-04-27

申请人： ShuangQuan Min ,  KianKeon Ooi ,  YangQuan Chen ,  Ricky Wei Watt Yeo ,  WeiSung Lee ,  BengWee Quak

发明人： ShuangQuan Min ,  KianKeon Ooi ,  YangQuan Chen ,  Ricky Wei Watt Yeo ,  WeiSung Lee ,  BengWee Quak

IPC分类号： G11B2736

CPC分类号： G11B5/5582

摘要： Written-in runout due to vibration of the cage of a spindle motor of a disc drive is detected by identifying an initial cage frequency value of the motor. A written-in magnitude of successive servo burst closures, D(nc), is read over a plurality of tracks, and a maximum servo burst closure D(ncp) is identified from the plurality of read servo bursts. A magnitude of the cage frequency at a servo sector n0 is calculated based on a difference between the read magnitudes of the servo burst closures at servo sectors nc and nc+1, and a phase of the cage frequency is calculated based on the magnitude of the written-in cage frequency at servo sector n0. The profile, in the form of cage frequency, maximum servo burst closure magnitude, and initial phase, is stored in a memory or table for each of a plurality of radial zones of tracks. The profile is combined with a position error signal and applied to the controller in a feed forward scheme to adjust the position of the head based on the written-in runout.

摘要翻译： 通过识别电动机的初始笼频率来检测由于磁盘驱动器的主轴电机的保持架的振动而产生的写入跳动。 在多个磁道上读取连续的伺服脉冲闭合D（nc）的写入幅度，并且从多个读取的伺服脉冲串中识别最大伺服脉冲串闭合D（ncp）。 基于伺服扇区nc和nc + 1处的伺服脉冲串闭合的读取幅度之间的差来计算伺服扇区n0处的笼频率的大小，并且基于 在伺服扇区n0上写入笼式频率。 笼形频率，最大伺服脉冲串闭合幅度和初始相位的形式的轮廓存储在轨道的多个径向区域中的每一个的存储器或表中。 该配置文件与位置误差信号组合，并以前馈方案应用于控制器，以基于写入跳动来调整头部的位置。