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1. 发明授权

US08896955B1 Adaptive track follow control 有权
标题翻译：自适应跟踪控制
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。

2. 发明授权

US08179626B1 Adaptive shock detection 有权
标题翻译：自适应冲击检测
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。

3. 发明授权

US08315006B1 Adaptive data writing mode based on drive environment 有权
标题翻译：基于驱动环境的自适应数据写入模式
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。

4. 发明授权

US08542455B2 Disk drive upsampling servo control signal 有权
标题翻译：磁盘驱动器上采样伺服控制信号
公开(公告)号：US08542455B2
公开(公告)日：2013-09-24
申请号：US13298133
申请日：2011-11-16
申请人： Yanan Huang , Alexander Babinski , Duc T. Phan , Aswartha Narayana
发明人： Yanan Huang , Alexander Babinski , Duc T. Phan , Aswartha Narayana
IPC分类号： G11B5/02
CPC分类号： G11B5/5547 , G11B5/596
摘要： A disk drive is disclosed comprising a disk including a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors. The disk drive further comprises an actuator for actuating a head over the disk in response to an actuator control signal. The servo sectors are read to generate a first sequence of control samples x[k] at a sample rate corresponding to a frequency of the servo sectors. The first sequence of control samples x[k] is upsampled by a factor of N to generate a second sequence of control samples y[ki] according to: y ⁡ [ k i ⁢ | i = 1 : N ] = ( 1 - i N - γ ) ⁢ u ⁡ [ k - 1 ] + ( i N + γ ) ⁢ u ⁡ [ k ] where γ is a scalar greater than or equal to zero and less than one. The actuator control signal is generated in response to the second sequence of control samples y[ki].
摘要翻译：公开了一种盘驱动器，其包括包括多个伺服轨道的盘，其中每个伺服轨道包括多个伺服扇区。磁盘驱动器还包括用于响应于致动器控制信号而将磁头驱动到磁盘上的致动器。读取伺服扇区，以对应于伺服扇区的频率的采样率产生第一控制样本序列x [k]。控制样本x [k]的第一序列由N因子进行上采样，以根据以下方式生成第二控制样本序列y：：y⁡[k i | i = 1：N] =（1-i N-γ）u⁡[k-1] +（i N + gamma）u⁡[k]其中，γ是大于或等于零且小于一。致动器控制信号响应于控制样本的第二序列y i而被产生。

5. 发明授权

US09142235B1 Disk drive characterizing microactuator by injecting sinusoidal disturbance and evaluating feed-forward compensation values 有权
标题翻译：磁盘驱动器通过注入正弦波干扰来表征微致动器并评估前馈补偿值
公开(公告)号：US09142235B1
公开(公告)日：2015-09-22
申请号：US12606819
申请日：2009-10-27
申请人： Alexander Babinski , Lingfei Zhou , Nathan J. Santee , Chuanwen Ji , Duc T. Phan
发明人： Alexander Babinski , Lingfei Zhou , Nathan J. Santee , Chuanwen Ji , Duc T. Phan
IPC分类号： G11B5/596
CPC分类号： G11B5/596 , G11B5/5552 , G11B5/5582 , G11B5/59622
摘要： A disk drive is disclosed comprising a disk having a plurality of tracks, a head, and a voice coil motor (VCM) and a microactuator for actuating the head over the disk in response to a feed-forward compensation value. A sinusoidal disturbance is applied to the microactuator, and the resulting feed-forward compensation value is processed to characterize the microactuator.
摘要翻译：公开了一种磁盘驱动器，其包括具有多个轨道的磁盘，磁头和音圈电机（VCM）以及用于响应于前馈补偿值而致动磁头的微致动器。对微致动器施加正弦扰动，并且处理所得到的前馈补偿值以表征微致动器。

6. 发明授权

US08508881B1 Disk drive employing system inversion for tuning seek to settle servo loop 有权
标题翻译：采用系统反转的磁盘驱动器进行调谐寻求稳定伺服环路
公开(公告)号：US08508881B1
公开(公告)日：2013-08-13
申请号：US13117036
申请日：2011-05-26
申请人： Alexander Babinski , Orhan Beker , Duc T. Phan , Donald Brunnett
发明人： Alexander Babinski , Orhan Beker , Duc T. Phan , Donald Brunnett
IPC分类号： G11B5/596
CPC分类号： G11B5/5547
摘要： A method is disclosed of operating a disk drive, the disk drive comprising a disk having a plurality of tracks, a head, and a closed loop servo system comprising a seek servo loop and a settle servo loop for actuating the head over the disk. The seek servo loop is used to seek the head toward a target track. When the head approaches the target track, the settle servo loop is used to settle the head on the target track in response to a reference signal generated in response to a system inversion of the settle servo loop.
摘要翻译：公开了一种操作磁盘驱动器的方法，该磁盘驱动器包括具有多个轨道的磁盘，磁头和闭环伺服系统，该伺服系统包括寻道伺服回路和用于在盘上致动磁头的稳定伺服回路。寻道伺服回路用于朝向目标轨道寻找头部。当头部接近目标轨迹时，响应于响应于稳定伺服环路的系统反转而产生的参考信号，使用稳定伺服环路在目标轨迹上安置磁头。

7. 发明授权

US07864482B1 Disk drive calibrating VCM notch filter by increasing the width and/or the depth of the notch 有权
标题翻译：磁盘驱动器通过增加槽口的宽度和/或深度来校准VCM陷波滤波器
公开(公告)号：US07864482B1
公开(公告)日：2011-01-04
申请号：US12394406
申请日：2009-02-27
申请人： Alexander Babinski , Duc T. Phan , Jun Huang , Yanbin Song
发明人： Alexander Babinski , Duc T. Phan , Jun Huang , Yanbin Song
IPC分类号： G11B21/02 , G11B5/596 , G11B27/36
CPC分类号： G11B5/5534 , G11B2220/2516
摘要： A disk drive is disclosed comprising a disk, a head, a voice coil motor (VCM) for actuating the head over the disk, and control circuitry comprising a notch filter for generating a VCM control signal, wherein a notch of the notch filter comprises a frequency, a width, and a depth. The notch filter is calibrated by initializing at least one of the width and the depth of the notch, measuring a quality metric of the notch filter, and increasing at least one of the width and the depth of the notch until the quality metric indicates good performance.
摘要翻译：公开了一种磁盘驱动器，其包括用于在磁盘上驱动磁头的磁盘，磁头，音圈电机（VCM）以及包括用于产生VCM控制信号的陷波滤波器的控制电路，其中陷波滤波器的凹口包括频率，宽度和深度。通过初始化凹口的宽度和深度中的至少一个来测量陷波滤波器，测量陷波滤波器的质量度量，并增加凹口的宽度和深度中的至少一个，直到质量度量表明良好的性能。

8. 发明授权

US07839600B1 Disk drive employing data-based basis function expansion for tuning seek servo loop 有权
标题翻译：磁盘驱动器采用基于数据的基础功能扩展，用于调谐寻道伺服环路
公开(公告)号：US07839600B1
公开(公告)日：2010-11-23
申请号：US12434979
申请日：2009-05-04
申请人： Alexander Babinski , Orhan Beker , Duc T. Phan
发明人： Alexander Babinski , Orhan Beker , Duc T. Phan
IPC分类号： G11B5/596
CPC分类号： G11B5/5547 , G11B5/59627
摘要： A method of tuning a seek operation of a disk drive is disclosed, the disk drive comprising a disk, an actuator arm, a head coupled to a distal end of the actuator arm, a voice coil motor (VCM) for rotating the actuator arm about a pivot, and a closed loop servo system for generating a VCM control signal applied to the VCM. A function h is applied to the closed loop servo system and a corresponding output g of the closed loop servo system is measured. A reference signal is generated in response to a summation of a plurality of the function h, wherein each of the plurality of the function h is shifted by an offset and scaled by a coefficient, and the coefficients are generated in response to the measured output g.
摘要翻译：公开了一种调整磁盘驱动器的寻道操作的方法，磁盘驱动器包括盘，致动器臂，耦合到致动器臂的远端的磁头，用于使致动器臂旋转的音圈电机（VCM）枢轴和用于产生施加到VCM的VCM控制信号的闭环伺服系统。函数h被施加到闭环伺服系统，并且测量闭环伺服系统的对应的输出g。响应于多个函数h的求和而产生参考信号，其中多个函数h中的每一个被移位偏移并且被系数缩放，并且响应于测量的输出g产生系数。

9. 发明授权

US07961422B1 Disk drive computing data center off-track from repeatable runout of write servo track and read servo track 有权
标题翻译：磁盘驱动器计算数据中心从写入伺服轨迹和读取伺服轨迹的可重复跳动偏离轨迹
公开(公告)号：US07961422B1
公开(公告)日：2011-06-14
申请号：US12388644
申请日：2009-02-19
申请人： Min Chen , Li Yi , Duc T. Phan
发明人： Min Chen , Li Yi , Duc T. Phan
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A disk drive is disclosed comprising a disk having a plurality of servo tracks that define a plurality of data tracks, and a head actuated over the disk by a voice coil motor (VCM), wherein the head comprises a read element offset radially from a write element. The read element is positioned over a first servo track and the write element is positioned over a second servo track, and a first repeatable runout (RRO) of the first servo track is measured. The read element is positioned over the second servo track, and a second RRO of the second servo track is measured. A data center off-track is computed in response to the first RRO and the second RRO.
摘要翻译：公开了一种磁盘驱动器，其包括具有限定多个数据磁道的多个伺服磁道的盘，以及由音圈电机（VCM）在盘上驱动的磁头，其中磁头包括从写入放射偏离的读取元件元件。读取元件位于第一伺服轨道之上，并且写入元件位于第二伺服轨道上，并且测量第一伺服轨道的第一可重复跳动（RRO）。读取元件位于第二伺服轨道上，并且测量第二伺服轨道的第二RRO。响应于第一RRO和第二RRO计算数据中心离轨。

10. 发明授权

US08743495B1 Disk drive detecting track squeeze when circular tracks are defined from non-circular servo tracks 有权
标题翻译：当圆形轨道由非圆形伺服轨道定义时，磁盘驱动器检测轨道挤压
公开(公告)号：US08743495B1
公开(公告)日：2014-06-03
申请号：US13153357
申请日：2011-06-03
申请人： Min Chen , Duc T. Phan
发明人： Min Chen , Duc T. Phan
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B20/10305
摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of non-circular servo tracks for defining a plurality of substantially circular tracks. Each non-circular servo track comprises a plurality of servo sectors defining a plurality of servo wedges. The head is positioned at a first offset relative to a first circular track and a relationship of servo bursts for each servo wedge is first generated. The head is positioned at a second offset relative to the first circular track and the relationship of the servo bursts for each servo wedge is second generated. For each servo wedge, a selection is made between the first generated relationship at the first offset and the second generated relationship at the second offset, and the servo bursts at the selected offset are evaluated to generate a track squeeze indicator.
摘要翻译：公开了一种磁盘驱动器，其包括在盘上致动的磁头，该磁头包括多个用于限定多个基本上圆形轨道的非圆形伺服磁道。每个非圆形伺服轨道包括限定多个伺服楔形的多个伺服扇区。头部相对于第一圆形轨道定位在第一偏移处，并且首先产生针对每个伺服楔的伺服脉冲串的关系。头部相对于第一圆形轨道定位在第二偏移处，并且第二次产生用于每个伺服楔块的伺服脉冲串的关系。对于每个伺服楔，在第一偏移处的第一生成关系和第二偏移处的第二生成关系之间进行选择，并且评估所选偏移处的伺服脉冲串以产生轨道挤压指示器。

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