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1. 发明授权

US07486468B2 Corrected read/write offset compensation 有权
标题翻译：更正了读/写偏移补偿
公开(公告)号：US07486468B2
公开(公告)日：2009-02-03
申请号：US11747008
申请日：2007-05-10
申请人： Ravi Hebbar , Justin Won
发明人： Ravi Hebbar , Justin Won
IPC分类号： G11B21/02
CPC分类号： G11B5/59627 , G11B5/59688
摘要： A read trajectory and/or a write trajectory of a read/write head of a rotatable disk drive is adjusted using a compensation signal that compensates for a time-varying difference between the read trajectory and the write trajectory.
摘要翻译：使用补偿信号来调整可旋转盘驱动器的读/写头的读取轨迹和/或写入轨迹，该补偿信号补偿读取轨迹和写入轨迹之间的时变差。

2. 发明申请

US20080278842A1 CORRECTED READ/WRITE OFFSET COMPENSATION 有权
标题翻译：更正的读/写偏移补偿
公开(公告)号：US20080278842A1
公开(公告)日：2008-11-13
申请号：US11747008
申请日：2007-05-10
申请人： Ravi Hebbar , Justin Won
发明人： Ravi Hebbar , Justin Won
IPC分类号： G11B21/02
CPC分类号： G11B5/59627 , G11B5/59688
摘要： A read trajectory and/or a write trajectory of a read/write head of a rotatable disk drive is adjusted using a compensation signal that compensates for a time-varying difference between the read trajectory and the write trajectory.
摘要翻译：使用补偿信号来调整可旋转盘驱动器的读/写头的读取轨迹和/或写入轨迹，该补偿信号补偿读取轨迹和写入轨迹之间的时变差。

3. 发明授权

US07151645B2 Interleaved repeatable runout estimation 有权
标题翻译：交错重复跳动估计
公开(公告)号：US07151645B2
公开(公告)日：2006-12-19
申请号：US10669185
申请日：2003-09-23
申请人： Justin Won , Samir Mittal , EweChye Tan
发明人： Justin Won , Samir Mittal , EweChye Tan
IPC分类号： G11B5/596 , G11B21/02
CPC分类号： G11B5/59627
摘要： A method and apparatus for reducing the effects of non-repeatable runout (NRRO) in the estimation of repeatable runout (RRO) in a disc drive is disclosed. PES information is a acquired in a way that leads to randomization of the phase of the NRRO, thereby decreasing the number of revolutions required to estimate the true RRO. A number of RRO estimation measurements are taken over a number of non-consecutive disc revolutions that are spaced in time. In one embodiment, one revolution of RRO data is collected from each head before collecting a second revolution of RRO data from any of the heads. In another embodiment, RRO estimation is concurrent with media certification, such that PES data is obtained while the head is in the write position and writes a track of data for media certification. Similarly, PES data for the read position is obtained while concurrently reading back the written data.
摘要翻译：公开了一种用于减少不可重复跳动（NRRO）在盘驱动器中的可重复跳动（RRO）估计中的影响的方法和装置。 PES信息是以导致NRRO阶段随机化的方式获得的，从而减少估计真实RRO所需的转数。多个RRO估计测量取决于时间间隔的多个非连续盘旋转。在一个实施例中，在从任何头部收集RRO数据的第二转之前，从每个头部收集RRO数据的一圈。在另一个实施例中，RRO估计与媒体认证同时进行，使得在头部处于写入位置时获得PES数据，并且写入用于媒体认证的数据轨迹。类似地，在同时读回写入数据的同时获得读取位置的PES数据。

4. 发明授权

US06937428B2 Reducing actuator arm oscillation during settle mode in a disc drive servo system 失效
标题翻译：在磁盘驱动器伺服系统中，在沉降模式下减少执行器臂振荡
公开(公告)号：US06937428B2
公开(公告)日：2005-08-30
申请号：US09788065
申请日：2001-02-16
申请人： Hai Thanh Ho , Justin Won , Fadi Youssef Abou-Jaoude , Gregory Andrew Campbell
发明人： Hai Thanh Ho , Justin Won , Fadi Youssef Abou-Jaoude , Gregory Andrew Campbell
IPC分类号： G11B21/10 , G11B5/55 , G11B5/596 , G11B21/02
CPC分类号： G11B5/59627 , G11B5/5556 , G11B5/59622
摘要： An apparatus and method for compensating actuator arm oscillation induced by resonance mode excitation during a seek in a disc drive data handling system. The actuator arm supports a head adjacent a recording surface, and a servo loop controls the position of the actuator arm. A frequency of actuator arm oscillation is identified, after which a seek is initiated to move the head from an initial track to a destination track on the recording surface. A position error signal (PES) is generated to indicate position of the head relative to the destination track, and a compensation signal is generated by a filter based on the PES and the frequency of oscillation of the actuator arm. The compensation signal is adapted to remove a component of the PES arising from the actuator arm oscillation, and is applied to the servo loop as the head is settled onto the destination track.
摘要翻译：一种用于在盘驱动器数据处理系统中的寻找期间补偿由共振模式激励引起的致动器臂振荡的装置和方法。致动器臂支撑与记录表面相邻的头部，伺服回路控制致动器臂的位置。识别致动器臂振荡的频率，之后启动搜索以将头部从初始轨迹移动到记录表面上的目的地轨迹。产生位置误差信号（PES）以指示头相对于目的地轨道的位置，并且基于PES的滤波器和致动器臂的振荡频率产生补偿信号。补偿信号适于去除由致动器臂振荡产生的PES的分量，并且当磁头安置在目的地轨道上时被施加到伺服环路。

5. 发明申请

US20050063086A1 Interleaved repeatable runout estimation 有权
标题翻译：交错重复跳动估计
公开(公告)号：US20050063086A1
公开(公告)日：2005-03-24
申请号：US10669185
申请日：2003-09-23
申请人： Justin Won , Samir Mittal , EweChye Tan
发明人： Justin Won , Samir Mittal , EweChye Tan
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A method and apparatus for reducing the effects of non-repeatable runout (NRRO) in the estimation of repeatable runout (RRO) in a disc drive is disclosed. PES information is a acquired in a way that leads to randomization of the phase of the NRRO, thereby decreasing the number of revolutions required to estimate the true RRO. A number of RRO estimation measurements are taken over a number of non-consecutive disc revolutions that are spaced in time. In one embodiment, one revolution of RRO data is collected from each head before collecting a second revolution of RRO data from any of the heads. In another embodiment, RRO estimation is concurrent with media certification, such that PES data is obtained while the head is in the write position and writes a track of data for media certification. Similarly, PES data for the read position is obtained while concurrently reading back the written data.
摘要翻译：公开了一种用于减少不可重复跳动（NRRO）在盘驱动器中的可重复跳动（RRO）估计中的影响的方法和装置。 PES信息是以导致NRRO阶段随机化的方式获得的，从而减少估计真实RRO所需的转数。多个RRO估计测量取决于时间间隔的多个非连续盘旋转。在一个实施例中，在从任何头部收集RRO数据的第二转之前，从每个头部收集RRO数据的一圈。在另一个实施例中，RRO估计与媒体认证同时进行，使得在头部处于写入位置时获得PES数据，并且写入用于媒体认证的数据轨迹。类似地，在同时读回写入数据的同时获得读取位置的PES数据。

6. 发明授权

US06819521B2 Repeated runout position error compensation in a disc drive servo system 失效
标题翻译：在磁盘驱动器伺服系统中重复跳动位置误差补偿
公开(公告)号：US06819521B2
公开(公告)日：2004-11-16
申请号：US09877053
申请日：2001-06-08
申请人： Hai T. Ho , Justin Won , Mirmehdi L. Abrishamchian , Gregory A. Campbell
发明人： Hai T. Ho , Justin Won , Mirmehdi L. Abrishamchian , Gregory A. Campbell
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： An apparatus and method for compensating repeated runout position error in a disc drive data handling system having an actuator assembly which supports a head adjacent a recording surface. A servo loop generates a position error signal (PES) to control the position of the head. A digital filter is configured to place a notch in an error sensitivity function relating the PES to the repeated runout position error, with the notch being nominally centered at a frequency of rotation of the recording surface. The filter thereafter filters the PES to generate compensation signals that are injected into the servo loop. At least selected filter parameters are determined by measuring the frequency response of the servo loop and used as a priori knowledge to produce a loop matching effect that results in a consistent convergence rate for any targeted frequency to be filtered.
摘要翻译：一种补偿盘驱动数据处理系统中的重复跳动位置误差的装置和方法，所述盘驱动器数据处理系统具有支撑靠近记录表面的头部的致动器组件。伺服回路产生位置误差信号（PES）以控制头部的位置。数字滤波器被配置成将陷波放置在将PES与重复的跳动位置误差相关联的误差灵敏度功能中，其中凹口名义上以记录表面的旋转频率为中心。滤波器之后过滤PES以产生注入伺服环路的补偿信号。至少选择的滤波器参数通过测量伺服环路的频率响应来确定，并用作先验知识以产生环路匹配效应，其导致任何要被滤波的目标频率的一致的收敛速率。

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