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1. 发明申请

US20180197569A1 HYSTERESIS COMPENSATION IN A DISC DRIVE 审中-公开
公开(公告)号：US20180197569A1
公开(公告)日：2018-07-12
申请号：US15915520
申请日：2018-03-08
申请人： SEAGATE TECHNOLOGY LLC
发明人： REED D. HANSON , KENNETH A. HAAPALA , DWIGHT R. KINNEY , XINGHUI HUANG
IPC分类号： G11B5/55 , G11B5/48 , G11B5/596
CPC分类号： G11B5/556 , G11B5/4873 , G11B5/59622
摘要： Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.

2. 发明授权

US09747936B1 Data storage device filtering sensor signal to optimize shock and thermal pop detection 有权
公开(公告)号：US09747936B1
公开(公告)日：2017-08-29
申请号：US15246364
申请日：2016-08-24
申请人： Western Digital Technologies, Inc.
发明人： Erik J. Eklund
IPC分类号： G11B5/55 , G11B5/596 , G11B19/04
CPC分类号： G11B5/5565 , G11B5/5547 , G11B5/5582 , G11B5/59622 , G11B5/59694 , G11B19/042 , G11B19/046
摘要： A data storage device is disclosed comprising a head actuated over a disk, and a sensor configured to generate a sensor signal representing at least one of a shock and a thermal popping affecting the data storage device. The sensor signal is first filtered based on a first frequency range corresponding to the shock to generate a shock signal, and second filtered based on a second frequency range corresponding to the thermal popping to generate a pop signal, wherein the second frequency range is different from the first frequency range. The shock signal and the pop signal are individually processed, for example, to log a disturbance event, to abort a write operation, or to generate a feed-forward servo compensation signal.

3. 发明申请

US20160019931A1 GENERATING POSITION ERROR SIGNAL BASED ON DATA TRACKS FOR ROTATING STORAGE DATA STORAGE 审中-公开
标题翻译：基于用于旋转存储数据存储的数据跟踪产生位置错误信号
公开(公告)号：US20160019931A1
公开(公告)日：2016-01-21
申请号：US14867302
申请日：2015-09-28
申请人： Marvell World Trade LTD.
发明人： Mats Oberg , Gregory BURD
IPC分类号： G11B20/10
CPC分类号： G11B5/59622 , G11B5/5547 , G11B5/59611 , G11B5/59627 , G11B5/5965 , G11B20/10212 , G11B20/10305
摘要： A system including an inter-track interference detection module and a position error signal generation module. The inter-track interference detection module determines a first inter-track interference value based on a first signal from a first sensor positioned over a first track of a rotating storage medium. The first inter-track interference value indicates energy contributed by tracks adjacent to the first track compared to energy contributed by the first track. The inter-track interference detection module determines a second inter-track interference value based on a second signal from a second sensor positioned over a second track of the rotating storage medium. The second inter-track interference value indicates energy contributed by tracks adjacent to the second track compared to energy contributed by the second track. The position error signal generation module generates a position error signal based on the first inter-track interference value and the second inter-track interference value.
摘要翻译：一种包括轨道间干扰检测模块和位置误差信号生成模块的系统。轨道间干扰检测模块基于位于旋转存储介质的第一轨道上的第一传感器的第一信号来确定第一轨道间干扰值。第一轨道间干扰值表示与由第一轨道贡献的能量相比，与第一轨道相邻的轨道所贡献的能量。轨道间干扰检测模块基于位于旋转存储介质的第二轨道上的第二传感器的第二信号来确定第二轨道间干扰值。第二轨道间干扰值指示与由第二轨道贡献的能量相比较的与第二轨道相邻的轨道所贡献的能量。位置误差信号产生模块基于第一轨道间干扰值和第二轨道间干扰值产生位置误差信号。

4. 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。

5. 发明授权

US08654467B1 Disk drive increasing bandwidth of cutoff filter while reading servo sector preamble 失效
标题翻译：磁盘驱动器在读取伺服扇区前导码时增加截止滤波器的带宽
公开(公告)号：US08654467B1
公开(公告)日：2014-02-18
申请号：US13448023
申请日：2012-04-16
申请人： Wai Ee Wong , Xiaotian Xu , Jinchuan Zheng , Guoxiao Guo , Jie Yu
发明人： Wai Ee Wong , Xiaotian Xu , Jinchuan Zheng , Guoxiao Guo , Jie Yu
IPC分类号： G11B27/36
CPC分类号： G11B20/10472 , G11B5/09 , G11B5/59622 , G11B5/6029 , G11B20/10046
摘要： A disk drive is disclosed comprising a disk including a plurality of servo tracks defined by servo sectors, wherein each servo sector comprises a servo preamble. A head is actuated over the disk, wherein the head is operable to generate a read signal. The disk drive further comprises control circuitry including an analog cutoff filter operable to filter the read signal to generate a filtered read signal. The filtered read signal is sampled to generate read samples. During a normal operating mode, the analog cutoff filter is configured to have a first bandwidth. During a measurement mode, the analog cutoff filter is configured to have a second bandwidth greater than the first bandwidth, and the read samples representing at least part of the servo preamble are processed to measure a signal-to-noise ratio (SNR) and/or a fly height of the head.
摘要翻译：公开了一种磁盘驱动器，其包括包括由伺服扇区定义的多个伺服磁道的磁盘，其中每个伺服扇区包括伺服前导码。头部被驱动在盘上，其中头部可操作以产生读取信号。磁盘驱动器还包括控制电路，其包括模拟截止滤波器，其可操作以对读取信号进行滤波以产生经滤波的读取信号。对经滤波的读取信号进行采样以产生读取样本。在正常操作模式期间，模拟截止滤波器被配置为具有第一带宽。在测量模式期间，模拟截止滤波器被配置为具有大于第一带宽的第二带宽，并且处理表示伺服前导码的至少一部分的读取样本以测量信噪比（SNR）和/ 或头部的飞高。

6. 发明申请

US20130083424A1 MAGNETIC DISK DEVICE AND HEAD-POSITION CONTROL METHOD 有权
标题翻译：磁盘设备和头位控制方法
公开(公告)号：US20130083424A1
公开(公告)日：2013-04-04
申请号：US13607027
申请日：2012-09-07
申请人： Masafumi IWASHIRO , Takao ABE , Hiroshi KUBOTA , Kazuhiko TAKAISHI
发明人： Masafumi IWASHIRO , Takao ABE , Hiroshi KUBOTA , Kazuhiko TAKAISHI
IPC分类号： G11B21/02
CPC分类号： G11B5/59622
摘要： A magnetic disk device includes a magnetic disk on which servo information is recorded, a head to read the servo information of the magnetic disk, and a position control module. When carrying out positioning control of the head, the position control module estimates frequency components of noise in a head positioning control process, using a high-order digital filter that includes first and second variable coefficients that are each based on position error information generated from the servo information read by the head.
摘要翻译：磁盘装置包括记录有伺服信息的磁盘，读取磁盘的伺服信息的磁头和位置控制模块。当执行头部的定位控制时，位置控制模块使用包括第一和第二可变系数的高阶数字滤波器来估计头部定位控制过程中的噪声的频率分量，所述第一和第二可变系数各自基于从由头读取的伺服信息。

7. 发明授权

US08412360B2 Method and system for robust attenuation of mechanical resonances using a multi-rate low pass filter 失效
标题翻译：使用多速率低通滤波器对机械谐振进行鲁棒衰减的方法和系统
公开(公告)号：US08412360B2
公开(公告)日：2013-04-02
申请号：US12861301
申请日：2010-08-23
申请人： Qing Wei Jia , Kensuke Amemiya
发明人： Qing Wei Jia , Kensuke Amemiya
IPC分类号： G05B11/01 , G11B5/596
CPC分类号： G11B5/59627 , G05B2219/41144 , G11B5/59622
摘要： A system for a providing a multi-rate digital low pass filter that attenuates high frequency resonances in a control signal. The filter described by a transfer function having a phase-advanced factor (or an approximation of phase-advanced factor) and a low pass filtering function; either cancels or avoids an unstable pole in the phase advanced factor at z=−1.
摘要翻译：一种用于提供多速率数字低通滤波器的系统，其衰减控制信号中的高频谐振。由具有相位超前因子（或相位提前因子的近似）和低通滤波函数的传递函数描述的滤波器; 在z = -1时取消或避免相位先进因子中的不稳定极点。

8. 发明申请

US20110063751A1 METHOD AND APPARATUS FOR POSITIONING A MAGNETIC-RECORDING HEAD 失效
标题翻译：用于定位磁记录头的方法和装置
公开(公告)号：US20110063751A1
公开(公告)日：2011-03-17
申请号：US12545000
申请日：2009-08-20
申请人： Kei YASUNA , Minoru HASHIMOTO , Thambiralah SUTHASUN
发明人： Kei YASUNA , Minoru HASHIMOTO , Thambiralah SUTHASUN
IPC分类号： G11B21/02
CPC分类号： G11B5/59622 , G11B5/59688
摘要： A method for positioning a magnetic-recording head. The method includes correcting amplitude of each burst signal of a plurality of burst signals read out with the magnetic-recording head from each respective burst pattern of a plurality of burst patterns. In addition, the method includes computing a deviation of the magnetic-recording head from a track based on corrected amplitudes of the plurality of burst signals. Moreover, the method includes positioning the magnetic-recording bead on the track based on the deviation of the magnetic-recording head.
摘要翻译：一种用于定位磁记录头的方法。该方法包括从多个突发图案的每个相应突发图案校正由磁记录头读出的多个突发信号的每个突发信号的幅度。此外，该方法包括基于多个突发信号的校正振幅来计算磁记录头与磁道的偏差。此外，该方法包括基于磁记录头的偏差将磁记录珠定位在轨道上。

9. 发明申请

US20100142082A1 DISK DRIVE AND METHOD FOR HEAD SERVO CONTROL OF THE DISK DRIVE 有权
标题翻译：磁盘驱动器的磁盘驱动器和磁盘驱动器的伺服控制方法
公开(公告)号：US20100142082A1
公开(公告)日：2010-06-10
申请号：US12631729
申请日：2009-12-04
申请人： Chikako Sakagami , Kazuhisa Shishida , Isao Yoneda , Kazuaki Usui , Hiroshi Uchida , Takeshi Saito , Kenji Tomida
发明人： Chikako Sakagami , Kazuhisa Shishida , Isao Yoneda , Kazuaki Usui , Hiroshi Uchida , Takeshi Saito , Kenji Tomida
IPC分类号： G11B21/02
CPC分类号： G11B5/5582 , G11B5/596 , G11B5/59622
摘要： A disk drive. The disk drive includes a head, a moving mechanism, a first peak filter, an adaptive peak filter, and a filter controller. The head is configured to read servo data on a disk at sampling frequency. The moving mechanism is configured to move the head in proximity with a recording surface of the disk. The first peak filter has a fixed peak frequency and a variable gain, and is configured to be inserted into a servo loop. The servo loop is configured to position the head with position error signals between servo data read by the head and a target position. The adaptive peak filter has a variable peak frequency and a variable gain, and is configured to be inserted into the servo loop. The filter controller is configured to control the gain of the adaptive peak filter according to the gain of the first peak filter.
摘要翻译：磁盘驱动器磁盘驱动器包括磁头，移动机构，第一峰值滤波器，自适应峰值滤波器和滤波器控制器。磁头被配置为以采样频率读取磁盘上的伺服数据。移动机构被配置为使磁头靠近磁盘的记录表面移动。第一峰值滤波器具有固定的峰值频率和可变增益，并被配置为插入到伺服环路中。伺服回路被配置为在头部读取的伺服数据与目标位置之间定位头部位置误差信号。自适应峰值滤波器具有可变的峰值频率和可变增益，并被配置为插入到伺服环路中。滤波器控制器被配置为根据第一峰值滤波器的增益来控制自适应峰值滤波器的增益。

10. 发明申请

US20100053799A1 METHOD FOR ESTIMATING POSITION ERROR GAIN FOR HARD DISK DRIVES 失效
标题翻译：用于估计硬盘驱动器的位置误差增益的方法
公开(公告)号：US20100053799A1
公开(公告)日：2010-03-04
申请号：US12203855
申请日：2008-09-03
申请人： Chang Ik Kang , Sang Hoon Chu
发明人： Chang Ik Kang , Sang Hoon Chu
IPC分类号： G11B5/596
CPC分类号： G11B5/59622 , G11B5/59688
摘要： A hard disk drive with a controller that determines a position error signal gain. The position error signal gain is determined from a total servo loop gain and a function that is defined by a slope of a line of A and B servo bits measured at N off-track positions. The function determines an actual plant gain and thus provides a more accurate position error signal gain.
摘要翻译：具有控制器的硬盘驱动器，用于确定位置误差信号增益。位置误差信号增益由总伺服环路增益和由在N个非轨道位置测量的A和B伺服位的行的斜率确定的函数确定。该功能确定实际的工厂增益，从而提供更准确的位置误差信号增益。

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