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11. 发明授权

US08922938B1 Disk drive filtering disturbance signal and error signal for adaptive feed-forward compensation 有权
标题翻译：磁盘驱动器滤波干扰信号和误差信号进行自适应前馈补偿
公开(公告)号：US08922938B1
公开(公告)日：2014-12-30
申请号：US13668142
申请日：2012-11-02
申请人： Western Digital Technologies, Inc.
发明人： Xu Chen , Jianguo Zhou , Wei Xi , Kuang-Yang Tu , Guoxiao Guo
IPC分类号： G11B21/02
CPC分类号： G11B19/042 , G11B5/59694
摘要： A disk drive is disclosed comprising a servo control system operable to actuate a head over a disk. A disturbance signal is generated in response to a vibration, and the disturbance signal is filtered with a first filter comprising a frequency response to generate a filtered disturbance signal. The filtered disturbance signal is filtered with a model of the servo control system to generate a compensated disturbance signal. An error signal of the servo control system is filtered with a second filter comprising the frequency response to generate a filtered error signal. An adaptation control signal is generated in response to the compensated disturbance signal and the filtered error signal, and an adaptive filter is adapted in response to the adaptation control signal, wherein the adaptive filter filters the disturbance signal to generate feed-forward compensation values applied to the servo control system to compensate for the vibration.
摘要翻译：公开了一种磁盘驱动器，其包括可操作以在盘上致动磁头的伺服控制系统。响应于振动产生干扰信号，并且用包括频率响应的第一滤波器对干扰信号进行滤波以产生滤波的干扰信号。滤波的干扰信号用伺服控制系统的模型进行滤波，以产生补偿的干扰信号。用包括频率响应的第二滤波器对伺服控制系统的误差信号进行滤波，以产生滤波后的误差信号。响应于经补偿的干扰信号和滤波的误差信号产生适应控制信号，并且响应于自适应控制信号适配自适应滤波器，其中自适应滤波器对干扰信号进行滤波以产生施加到伺服控制系统补偿振动。

12. 发明授权

US10984831B1 Data storage device compensating for seek vibration using vibration sensor 有权
公开(公告)号：US10984831B1
公开(公告)日：2021-04-20
申请号：US16929887
申请日：2020-07-15
申请人： Western Digital Technologies, Inc.
发明人： Jianguo Zhou , Li Zhou , Feng Hong
IPC分类号： G11B19/04 , G11B19/14 , G11B5/596 , G11B5/55
摘要： A data storage device is disclosed comprising an actuator configured to actuate a head over a disk surface, and a vibration sensor configured to generate a vibration signal (VS). Control circuitry comprising a servo control system having a torque rejection curve (TRC) configured to control the actuator is configured to measure a position error signal (PES) of the head, and measure the VS output by the vibration sensor. A feed-forward compensator is configured based on PES/VS/TRC. While seeking the head across the disk surface, the VS is processed using the feed-forward compensator to generate a feed-forward compensation during a settle interval of the seek, and the actuator is controlled using the feed-forward compensation during the settle interval.

13. 发明授权

US09111575B1 Data storage device employing adaptive feed-forward control in timing loop to compensate for vibration 有权
标题翻译：数据存储装置采用定时回路中的自适应前馈控制来补偿振动
公开(公告)号：US09111575B1
公开(公告)日：2015-08-18
申请号：US14522404
申请日：2014-10-23
申请人： Western Digital Technologies, Inc.
发明人： Jianguo Zhou , Wei Xi , Guoxiao Guo , Hui Li
IPC分类号： G11B21/02 , G11B5/09 , G11B20/10 , G11B19/28 , G11B5/596
CPC分类号： G11B19/28 , G11B5/5582 , G11B5/59694 , G11B19/042 , G11B20/10009 , G11B20/10046 , G11B20/10222
摘要： A data storage device is disclosed comprising a head actuated over a disk and a vibration detector configured to generate a vibration signal in response to a vibration affecting the data storage device. A timing loop is configured to generate a disk-locked clock substantially synchronized to a rotation frequency of the disk. An adaptation control signal is generated based on the vibration signal and an error signal of the timing loop. An adaptive filter is adapted based on the adaptation control signal, wherein the adaptive filter filters the vibration signal to generate feed-forward compensation values. The feed-forward compensation values are applied to the timing loop to compensate for the vibration.
摘要翻译：公开了一种数据存储装置，包括在磁盘上驱动的磁头和配置成响应于影响数据存储装置的振动而产生振动信号的振动检测器。定时循环被配置为生成基本上与盘的旋转频率同步的盘锁定时钟。基于振动信号和定时回路的误差信号产生适应控制信号。基于自适应控制信号适配自适应滤波器，其中自适应滤波器滤波振动信号以产生前馈补偿值。将前馈补偿值应用于定时回路以补偿振动。

14. 发明授权

US08767332B1 Disk drive predicting off-track error due to disturbances occurring over different frequency ranges 有权
标题翻译：磁盘驱动器预测由于在不同频率范围内发生的干扰导致的偏离磁道错误
公开(公告)号：US08767332B1
公开(公告)日：2014-07-01
申请号：US13856410
申请日：2013-04-03
申请人： Western Digital Technologies, Inc.
发明人： Alain Chahwan , Jianguo Zhou
IPC分类号： G11B19/04 , G11B5/596
CPC分类号： G11B19/042 , G11B5/5582 , G11B5/59627 , G11B5/59688 , G11B5/59694
摘要： A disk drive is disclosed comprising a disk, a head, and control circuitry comprising a servo control system operable to actuate the head over the disk. A vibration signal VS(k) is measured representing a disturbance in the servo control system. A first future value of the vibration signal VS(k) is predicted based on: VS1(k+1)=α1[VS(k)−VS(k−1)]+VS(k) where α1 is a first scalar corresponding to a first frequency range. A second future value of the vibration signal VS(k) is predicted based on: VS2(k+1)=α2[VS(k)−VS(k−1)]+VS(k) where α2 is a second scalar corresponding to a second frequency range different from the first frequency range.
摘要翻译：公开了一种磁盘驱动器，其包括磁盘，磁头和控制电路，其包括可操作以在磁盘上致动磁头的伺服控制系统。测量表示伺服控制系统中的干扰的振动信号VS（k）。基于：VS1（k + 1）=α1[VS（k）-VS（k-1）] + VS（k）来预测振动信号VS（k）的第一未来值，其中α1是对应的第一标量到第一频率范围。基于：VS2（k + 1）=α2[VS（k）-VS（k-1）] + VS（k）来预测振动信号VS（k）的第二个未来值，其中α2是对应于第二标量到与第一频率范围不同的第二频率范围。

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