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1. 发明授权

US10020017B2 Hard disk drive and head positioning method 有权
公开(公告)号：US10020017B2
公开(公告)日：2018-07-10
申请号：US14975366
申请日：2015-12-18
申请人： Kabushiki Kaisha Toshiba
发明人： Takao Furuhashi
IPC分类号： G11B19/04 , G11B5/596
CPC分类号： G11B19/045 , G11B5/59611 , G11B5/59627
摘要： According to one embodiment, a hard disk drive includes a disk including a plurality of data areas, and a plurality of servo areas between the plurality of data areas, an arm holding a write head and a read arm, and a positioning module which positions the read head or the write head by rotating the arm, wherein the positioning module positioning the write head by positioning the read head, and adjusting a position of the read head or the write head, based on an output of the read head located in a data area between two servo areas adjacent in a peripheral direction, of the plurality of servo areas.

2. 发明授权

US09837110B1 Digital data driven position error signal for magnetic recording 有权
公开(公告)号：US09837110B1
公开(公告)日：2017-12-05
申请号：US15614447
申请日：2017-06-05
申请人： Marvell International Ltd.
发明人： Mats Oberg , Gregory Burd , Yifei Zhang , Qiyue Zou
IPC分类号： G11B5/596
CPC分类号： G11B5/59611 , G11B5/3977 , G11B5/4886 , G11B5/59627
摘要： Various embodiments provide the position error signal (PES) that is generated by the data read channel that uses internal signals such as analog-to-digital signals, recovered data bits and signals or other internal signals to determine read head off-track metrics. Several different metrics can be utilized including a normalized norm metric, a normalized cross correlation metric, and a cross correlation with detected data metric. These metrics can be utilized to determine off-track shift of one or more read heads such that the read head position can be corrected.

3. 发明授权

US09672853B1 Digital data driven position error signal for magnetic recording 有权
公开(公告)号：US09672853B1
公开(公告)日：2017-06-06
申请号：US15089341
申请日：2016-04-01
申请人： Marvell International Ltd.
发明人： Mats Oberg , Gregory Burd , Yifei Zhang , Qiyue Zou
IPC分类号： G11B5/596
CPC分类号： G11B5/59611 , G11B5/3977 , G11B5/4886 , G11B5/59627
摘要： Various embodiments provide the position error signal (PES) that is generated by the data read channel that uses internal signals such as analog-to-digital signals, recovered data bits and signals or other internal signals to determine read head off-track metrics. Several different metrics can be utilized including a normalized norm metric, a normalized cross correlation metric, and a cross correlation with detected data metric. These metrics can be utilized to determine off-track shift of one or more read heads such that the read head position can be corrected.

4. 发明授权

US09052701B1 Disk drive measuring a resonance mode by injecting sinusoids into a servo control system 有权
标题翻译：磁盘驱动器通过将正弦曲线注入伺服控制系统来测量谐振模式
公开(公告)号：US09052701B1
公开(公告)日：2015-06-09
申请号：US13585679
申请日：2012-08-14
申请人： Qingwei Jia , Shuyu Cao , Guoxiao Guo , Jie Yu
发明人： Qingwei Jia , Shuyu Cao , Guoxiao Guo , Jie Yu
IPC分类号： G05B5/01
CPC分类号： G05B5/01 , G11B5/59611 , G11B5/59622 , H02P25/034
摘要： A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors recorded around the circumference of the disk at a servo sampling frequency, and a servo control system operable to actuate a head over the disk by generating a control signal applied to an actuator. A first sinusoid is injected into the servo control system and a first DC component (dc1) is measured in the control signal. A second sinusoid is injected into the servo control system and a second DC component (dc2) is measured in the control signal, wherein the second sinusoid comprises a phase offset from the first sinusoid. A resonance mode of the servo control system is measured based on dc1 and dc2.
摘要翻译：公开了一种磁盘驱动器，其包括盘，该盘包括以伺服采样频率记录在盘周围的伺服扇区所限定的多个伺服轨迹;以及伺服控制系统，可操作以通过产生施加的控制信号来驱动磁盘上的磁头到致动器。在伺服控制系统中注入第一个正弦曲线，并在控制信号中测量第一个直流分量（dc1）。将第二正弦波注入到伺服控制系统中，并且在控制信号中测量第二直流分量（dc2），其中第二正弦波包括与第一正弦波相位偏移。基于dc1和dc2测量伺服控制系统的谐振模式。

5. 发明授权

US08817414B1 Data detector for detecting data in presence of control signals 有权
标题翻译：用于检测存在控制信号的数据的数据检测器
公开(公告)号：US08817414B1
公开(公告)日：2014-08-26
申请号：US13624054
申请日：2012-09-21
申请人： Marvell International Ltd.
发明人： Zining Wu , Pantas Sutardja
IPC分类号： G11B5/09 , G11B20/10 , G11B5/596
CPC分类号： G11B20/10046 , G11B5/09 , G11B5/59611 , G11B5/59644 , G11B5/59688 , G11B20/10009
摘要： Systems, methods, and other embodiments associated with a data detector that processes signals read from a storage device are described. According to one embodiment, a detector for detecting a data signal embedded in a read signal from a storage device includes a signal estimator configured to generate an estimate of the control signal from the read signal by sampling the read signal to determine characteristics of the control signal. The read signal includes the data signal and the control signal. The signal estimator uses the characteristics to calculate the estimate of the control signal. The detector also includes a cancellation unit configured to produce the data signal by cancelling the estimate of the control signal from the read signal.
摘要翻译：描述了与处理从存储设备读取的信号的数据检测器相关联的系统，方法和其它实施例。根据一个实施例，用于检测嵌入在来自存储装置的读取信号中的数据信号的检测器包括：信号估计器，被配置为通过对读取信号进行采样来生成来自读取信号的控制信号的估计，以确定控制信号的特性。读信号包括数据信号和控制信号。信号估计器使用特征来计算控制信号的估计。检测器还包括消除单元，其被配置为通过从读取信号中消除控制信号的估计来产生数据信号。

6. 发明授权

US08670200B2 Servo pattern read-back signal processing for storage devices 有权
标题翻译：存储设备的伺服模式回读信号处理
公开(公告)号：US08670200B2
公开(公告)日：2014-03-11
申请号：US13403119
申请日：2012-02-23
申请人： Donald J Fasen
发明人： Donald J Fasen
IPC分类号： G11B20/10
CPC分类号： G11B5/09 , G11B5/584 , G11B5/59611 , G11B5/59688 , G11B20/10018
摘要： Servo pattern read-back signal processing for storage devices is described. In an example, a method of processing a read-back signal derived from a servo pattern on a storage medium in a storage device includes differentiating the read-back signal in an analog domain to produce a differentiated signal; and converting the differentiated signal into digital samples.
摘要翻译：描述存储设备的伺服模式回读信号处理。在一个示例中，处理从存储设备中的存储介质上的伺服模式导出的回读信号的方法包括区分模拟域中的回读信号以产生微分信号; 并将微分信号转换为数字样本。

7. 发明授权

US07933092B1 Method and apparatus for estimating a position of a head in a disk drive 有权
标题翻译：用于估计磁盘驱动器中磁头位置的方法和装置
公开(公告)号：US07933092B1
公开(公告)日：2011-04-26
申请号：US12470987
申请日：2009-05-22
申请人： Xueshi Yang , Michael Madden , Zining Wu
发明人： Xueshi Yang , Michael Madden , Zining Wu
IPC分类号： G11B5/596
CPC分类号： G11B5/5556 , G11B5/59611
摘要： In a method for providing an estimate of a head position for a disk drive, a readback signal is filtered. The readback signal includes a first position signal component corresponding to a first position pattern on a disk, and includes a second position signal component corresponding to a second position pattern on the disk. Filtering the readback signal includes using a filter determined based on statistical information regarding a noise component of the readback signal. An estimate of an amplitude of the first position signal component is generated based on the filtered readback signal, and an estimate of an amplitude of the second position signal component is generated based on the filtered readback signal. An estimate of a head position with respect to a track on the disk is generated based on the estimate of the amplitude of the first position signal component and the estimate of the amplitude of the second position signal component.
摘要翻译：在用于提供磁盘驱动器的磁头位置的估计的方法中，滤波回读信号。回读信号包括对应于盘上的第一位置图案的第一位置信号分量，并且包括对应于盘上的第二位置图案的第二位置信号分量。过滤回读信号包括使用基于关于回读信号的噪声分量的统计信息确定的滤波器。基于经滤波的回读信号生成第一位置信号分量的振幅的估计，并且基于滤波的回读信号生成第二位置信号分量的振幅的估计。基于第一位置信号分量的振幅的估计和第二位置信号分量的振幅的估计，产生相对于磁盘上的磁道的磁头位置的估计。

8. 发明申请

US20090168222A1 Correcting a track pitch error with a subsequent servo-write pass 失效
标题翻译：用随后的伺服写入通道校正轨道间距误差
公开(公告)号：US20090168222A1
公开(公告)日：2009-07-02
申请号：US12005959
申请日：2007-12-28
申请人： Satyajit N. Patwardhan , Steven C. Smith
发明人： Satyajit N. Patwardhan , Steven C. Smith
IPC分类号： G11B5/596
CPC分类号： G11B5/5526 , G11B5/59611
摘要： A method for correcting a track pitch error in servo tracks written on a magnetic recording media coupled with a disk surface, by using a subsequent servo-write pass, comprises propagating servo tracks across the magnetic recording media in a previous servo-write pass. The servo tracks have radial positioning servo code. The servo tracks enable a magnetic transducer to be positioned to at least one radial position on the magnetic recording media. At least one corrected radial reference point is calculated for the track pitch error written on the magnetic recording media, by identifying at least one inconsistency between a mechanical response of an actuator and the track pitch. A corrected location for at least one servo track is identified. At least one new servo track at the corrected location is propagated with the subsequent servo-write pass. Optimum data track distribution across the disk surface and optimum reading and writing of data to and from the magnetic recording media is enabled.
摘要翻译：通过使用随后的伺服写入通过来校正写在与磁盘表面耦合的磁记录介质上的伺服磁道中的磁道间距误差的方法，包括在先前的伺服写入通道中在磁记录介质上传播伺服磁道。伺服轨道具有径向定位伺服代码。伺服轨道使磁传感器能够定位在磁记录介质上的至少一个径向位置。通过识别致动器的机械响应和轨道间距之间的至少一个不一致来计算写入磁记录介质上的轨道间距误差的至少一个校正的径向参考点。识别至少一个伺服轨道的校正位置。校正位置处的至少一个新的伺服轨迹随后续的伺服写入通过传播。实现磁盘表面的最佳数据磁道分布，以及对磁记录介质进行数据的最佳读写。

9. 发明授权

US07551390B1 Disk drive to characterize misaligned servo wedges 失效
标题翻译：磁盘驱动器来表征不对准的伺服楔
公开(公告)号：US07551390B1
公开(公告)日：2009-06-23
申请号：US11842315
申请日：2007-08-21
申请人： Zhi Wang , Jenghung Chen
发明人： Zhi Wang , Jenghung Chen
IPC分类号： G11B5/596 , G11B5/09
CPC分类号： G11B5/59611 , G11B19/045 , G11B20/10009 , G11B20/10222 , G11B20/1403 , G11B20/18 , G11B2020/1282 , G11B2220/2516
摘要： Disclosed is a disk drive and method to characterize misaligned servo wedges. The disk drive includes an actuator arm, a head, a disk, and a servo controller. The head is connected to a distal end of the actuator arm in which the actuator arm is rotatable about a pivot to move the head radially over the disk. The servo controller is used to characterize misaligned servo wedges by implementing operations including: commanding the head to track follow on a track; measuring wedge-to-wedge time (WTWT) values corresponding to time intervals between identified servo wedges; calculating wedge-to-wedge time (WTWT) variations for the measured WTWT values; and characterizing the calculated WTWT variations, wherein, characterizing the calculated WTWT variations for the track includes utilizing a WTWT variation modeling function to model the WTWT variations.
摘要翻译：公开了一种用于表征不对准伺服楔的磁盘驱动器和方法。磁盘驱动器包括致动器臂，磁头，磁盘和伺服控制器。头部连接到致动器臂的远端，致动器臂可绕枢轴旋转，以使头部径向移动到盘上。伺服控制器用于通过执行操作来表征不对准的伺服楔块，包括：命令头跟踪轨道跟踪; 测量对应于所识别的伺服楔之间的时间间隔的楔到楔时间（WTWT）值; 计算测量WTWT值的楔形到楔形时间（WTWT）变化; 并且表征所计算的WTWT变化，其中，表征所述轨道的所计算的WTWT变化包括利用WTWT变化建模函数来模拟所述WTWT变化。

10. 发明授权

US06977788B2 Method and apparatus for adjusting angular position of magnetic head unit 有权
标题翻译：调整磁头单元角位置的方法和装置
公开(公告)号：US06977788B2
公开(公告)日：2005-12-20
申请号：US09836201
申请日：2001-04-18
申请人： Akihiro Hosokawa , Satoshi Yamaguchi , Makoto Ohashi , Mitsuo Hayashi
发明人： Akihiro Hosokawa , Satoshi Yamaguchi , Makoto Ohashi , Mitsuo Hayashi
IPC分类号： G11B5/56 , G11B5/596 , G11B21/02 , G11B21/24
CPC分类号： G11B5/59611 , G11B5/596 , G11B21/02
摘要： A significant change in the static angular position can be produced from a small physical displacement of the flexible member. The flexible member 12 in a magnetic head unit 95 is stressed for adjusting the static angular position. Simultaneously, the stressed areas 14 are irradiated by a laser beam LA.
摘要翻译：可以从柔性构件的小的物理位移产生静态角位置的显着变化。磁头单元95中的柔性构件12受到应力以调整静态角位置。同时，受激区域14被激光束LA照射。

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