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1. 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。

2. 发明授权

US07253989B1 Disk drive compensation of bias imparted by a flex circuit cable utilizing a dual bias curve estimation scheme 有权
标题翻译：使用双偏置曲线估计方案由柔性电路电缆施加的偏置的磁盘驱动器补偿
公开(公告)号：US07253989B1
公开(公告)日：2007-08-07
申请号：US11086814
申请日：2005-03-21
申请人： Pui-Wah Lau , Jenghung Chen , Yanbin Song
发明人： Pui-Wah Lau , Jenghung Chen , Yanbin Song
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A disk drive comprising an actuator including a head, a disk, and a processor connected to the actuator by a flex circuit cable. The processor under the control of a program to: apply a control signal for a seek operation and to apply a bias signal to the control signal to approximate the bias imparted by the flex circuit cable. The bias is determined from a data structure that stores: bias values for track zones representative of a first and second bias curves that approximate a bias imparted by the flex circuit cable upon the actuator as the actuator moves the head from the OD to the ID of the disk and from the ID to the OD of the disk, respectively. The bias values representative of the first and second bias curves are determined based upon a non-linear apportionment of track zones.
摘要翻译：一种磁盘驱动器，其包括致动器，该致动器包括磁头，磁盘和通过柔性电路电缆连接到致动器的处理器。所述处理器在程序的控制下：施加用于寻道操作的控制信号，并向所述控制信号施加偏置信号以近似由所述柔性电路电缆施加的偏置。从存储有：代表第一和第二偏置曲线的轨道区域的偏置值的数据结构确定偏置，该第一和第二偏置曲线近似由柔性电路电缆在致动器上施加的偏压，因为致动器将磁头从OD移动到ID 磁盘和从ID到磁盘的OD分别。基于轨道区域的非线性分配来确定表示第一和第二偏置曲线的偏置值。

3. 发明授权

US06900958B1 Method and disk drive for improving head position accuracy during track following through real-time identification of external vibration and monitoring of write-unsafe occurrences 失效
标题翻译：方法和磁盘驱动器，用于通过实时识别外部振动和监视写入不安全事件来提高跟踪跟踪期间的头位置精度
公开(公告)号：US06900958B1
公开(公告)日：2005-05-31
申请号：US10632434
申请日：2003-07-31
申请人： Li Yi , Yanbin Song , David A. Spaulding , Arafat M. Butt , Robert J. McNab , David D. Nguyen
发明人： Li Yi , Yanbin Song , David A. Spaulding , Arafat M. Butt , Robert J. McNab , David D. Nguyen
IPC分类号： G11B5/55 , G11B5/596
CPC分类号： G11B5/59627 , G11B5/5582 , G11B5/59694
摘要： A method is disclosed for improving head position accuracy in a disk drive during track following of concentric data storage tracks through real-time identification of external vibration and monitoring of write-unsafe (WUS) occurrences. In the method, after a seek operation to a predetermined data storage track, the track is followed using a servo control loop having a nominal gain and responsive to a position error signal (PES). After waiting a vibration detection delay period, occurrences of the PES exceeding a WUS limit are counted generating a WUS limit exception count. Also, a property of a variance is determined from spectral power values generated from the PES during track following. If the WUS limit exception count exceeds a first threshold, and if the property of the variance exceeds a second threshold, the nominal gain is increased to a vibration gain within a frequency band, to attenuate the effect of external vibration.
摘要翻译：公开了一种用于通过实时识别外部振动和监视写入不安全（WUS）事件来提高同步数据存储轨道跟踪期间磁盘驱动器中磁头位置精度的方法。在该方法中，在对预定数据存储轨迹进行搜索操作之后，使用具有额定增益并响应于位置误差信号（PES）的伺服控制回路跟踪轨道。在等待振动检测延迟时间之后，对超出WUS限制的PES的发生进行计数，生成WUS限制异常计数。此外，由跟踪期间的PES生成的频谱功率值确定方差的属性。如果WUS限制异常计数超过第一阈值，并且如果方差性质超过第二阈值，则标称增益增加到频带内的振动增益，以衰减外部振动的影响。

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