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1. 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。

2. 发明申请

US20200372931A1 CALIBRATING ELEVATOR ACTUATOR FOR DISK DRIVE 审中-公开
公开(公告)号：US20200372931A1
公开(公告)日：2020-11-26
申请号：US16806029
申请日：2020-03-02
申请人： Western Digital Technologies, Inc.
发明人： Kuang-Yang Tu , Jenghung Chen , Lan V. Ngo
IPC分类号： G11B5/55
摘要： A data storage device is disclosed comprising a first disk comprising a first disk surface, a second disk comprising a second disk surface, an actuator arm, a head coupled to a distal end of the actuator arm, and a ramp for loading/unloading the head. A first elevator actuator is configured to actuate the actuator arm along an axial dimension relative to the first and second disks, and a second elevator actuator is configured to actuate at least part of the ramp along the axial dimension, wherein a simultaneous movement of the first and second elevator actuators is synchronized.

3. 发明授权

US10839838B1 Calibrating elevator actuator for disk drive 有权
公开(公告)号：US10839838B1
公开(公告)日：2020-11-17
申请号：US16806029
申请日：2020-03-02
申请人： Western Digital Technologies, Inc.
发明人： Kuang-Yang Tu , Jenghung Chen , Lan V. Ngo
IPC分类号： G11B5/58 , G11B5/55
摘要： A data storage device is disclosed comprising a first disk comprising a first disk surface, a second disk comprising a second disk surface, an actuator arm, a head coupled to a distal end of the actuator arm, and a ramp for loading/unloading the head. A first elevator actuator is configured to actuate the actuator arm along an axial dimension relative to the first and second disks, and a second elevator actuator is configured to actuate at least part of the ramp along the axial dimension, wherein a simultaneous movement of the first and second elevator actuators is synchronized.

4. 发明授权

US09007714B1 Data storage device comprising slew rate anti-windup compensation for microactuator 有权
标题翻译：数据存储装置包括用于微致动器的压摆率抗饱和补偿
公开(公告)号：US09007714B1
公开(公告)日：2015-04-14
申请号：US14335653
申请日：2014-07-18
申请人： Western Digital Technologies, Inc.
发明人： Minghui Zheng , Xu Chen , Haiming Wang , Young-Hoon Kim , Wei Xi , Kuang-Yang Tu
IPC分类号： G11B21/02 , G11B5/55
CPC分类号： G11B5/5526 , G11B5/5552
摘要： A data storage device is disclosed comprising a disk, a head, and a microactuator configured to actuate the head over the disk. An input signal to a compensator is generated, wherein the compensator is configured to generate a microactuator control signal. A slew rate signal representing a slew rate of the microactuator control signal is generated and applied to a first saturator configured to generate a saturated slew rate signal. The input signal is adjusted based on the slew rate saturation signal, and the microactuator is controlled based on the microactuator control signal.
摘要翻译：公开了一种数据存储装置，包括盘，头和微致动器，其构造成在盘上致动头。产生到补偿器的输入信号，其中补偿器被配置为产生微致动器控制信号。产生表示微致动器控制信号的转换速率的转换速率信号，并将其施加到被配置为产生饱和转换速率信号的第一饱和器。输入信号根据压摆率饱和信号进行调整，微型致动器根据微致动器控制信号进行控制。

5. 发明授权

US10783912B1 Calibrating elevator actuator for disk drive 有权
公开(公告)号：US10783912B1
公开(公告)日：2020-09-22
申请号：US16718828
申请日：2019-12-18
申请人： Western Digital Technologies, Inc.
发明人： Kuang-Yang Tu , Jenghung Chen
IPC分类号： G11B5/55 , G11B5/596 , G11B5/60 , G11B5/54
摘要： A data storage device is disclosed comprising an elevator actuator configured to actuate a head along an axial dimension, and a position sensor configured to generate a sinusoidal sensor signal representing a position of the head along the axial dimension, wherein the position sensor comprises a sensor element and an encoder strip comprising a pattern having at least one region that causes a disturbance in the sinusoidal sensor signal. The elevator actuator is controlled to move the head in a first direction along the axial dimension to detect the disturbance in the sinusoidal sensor signal, and when the disturbance in the sinusoidal signal is detected, the elevator actuator is controlled to move the head in a second direction along the axial dimension opposite the first direction in order to measure a zero crossing of the sinusoidal sensor signal.

6. 发明授权

US09269386B1 Data storage device on-line adapting disturbance observer filter 有权
标题翻译：数据存储设备在线适应干扰观测器滤波器
公开(公告)号：US09269386B1
公开(公告)日：2016-02-23
申请号：US14563837
申请日：2014-12-08
申请人： Western Digital Technologies, Inc.
发明人： Wei Xi , Young-Hoon Kim , Kuang-Yang Tu
IPC分类号： G11B27/36 , G11B21/02 , G11B5/596
CPC分类号： G11B5/59694 , G11B5/59622 , G11B5/59644
摘要： A data storage device is disclosed comprising a head actuated over a disk comprising tracks defined by servo sectors. A location of the head is generated based on the servo sectors, and a position error signal (PES) representing a difference between a target location for the head and the measured location for the head is generated. An actuator control signal (ACS) is generated in response to the PES, a disturbance compensation signal (DCS) is generated based on the PES and the ACS, and the DCS is filtered with a disturbance observer filter. The DCS is filtered with a plurality of band-pass filters, and an output of one of the band-pass filters is filtered with a peak detection filter configured to detect a peak frequency corresponding to a peak in a frequency response of the band-pass filter, wherein the disturbance observer filter is adjusted based on the peak frequency.
摘要翻译：公开了一种数据存储装置，包括在包括由伺服扇区限定的轨道的盘上致动的磁头。基于伺服扇区产生头部的位置，并且产生表示头部的目标位置与头部的测量位置之间的差异的位置误差信号（PES）。响应于PES产生致动器控制信号（ACS），基于PES和ACS产生干扰补偿信号（DCS），并且用干扰观测器滤波器对DCS进行滤波。用多个带通滤波器对DCS进行滤波，并且用峰值检测滤波器滤波一个带通滤波器的输出，该峰值检测滤波器被配置为检测对应于带通频率响应中的峰值的峰值频率滤波器，其中基于峰值频率来调整干扰观测器滤波器。

7. 发明授权

US11043243B2 Calibrating elevator actuator for disk drive 有权
公开(公告)号：US11043243B2
公开(公告)日：2021-06-22
申请号：US16995050
申请日：2020-08-17
申请人： Western Digital Technologies, Inc.
发明人： Kexiu Liu , Kuang-Yang Tu , Jenghung Chen , Naoyuki Kagami , Gaku Ikedo
IPC分类号： G11B5/55 , G11B21/08 , G11B5/012 , G11B5/60 , G11B5/596
摘要： A data storage device is disclosed wherein an elevator actuator is controlled to move a head along an axial dimension toward a first disk surface of a first disk while processing a proximity signal generated by a proximity sensor. A first actuator position is detected when the actuator arm is proximate the first disk surface of the first disk based on the proximity signal.

8. 发明申请

US20200381016A1 CALIBRATING ELEVATOR ACTUATOR FOR DISK DRIVE 审中-公开
公开(公告)号：US20200381016A1
公开(公告)日：2020-12-03
申请号：US16995050
申请日：2020-08-17
申请人： Western Digital Technologies, Inc.
发明人： Kexiu Liu , Kuang-Yang Tu , Jenghung Chen , Naoyuki Kagami , Gaku Ikedo
IPC分类号： G11B21/08 , G11B5/012
摘要： A data storage device is disclosed wherein an elevator actuator is controlled to move a head along an axial dimension toward a first disk surface of a first disk while processing a proximity signal generated by a proximity sensor. A first actuator position is detected when the actuator arm is proximate the first disk surface of the first disk based on the proximity signal.

9. 发明授权

US09058827B1 Disk drive optimizing filters based on sensor signal and disturbance signal for adaptive feed-forward compensation 有权
标题翻译：基于传感器信号和干扰信号的磁盘驱动器优化滤波器进行自适应前馈补偿
公开(公告)号：US09058827B1
公开(公告)日：2015-06-16
申请号：US13927096
申请日：2013-06-25
申请人： Western Digital Technologies, Inc.
发明人： Kuang-Yang Tu , Wei Xi , Jianguo Zhou , Teddy T. Chen
IPC分类号： G11B5/596 , G11B5/58
CPC分类号： G11B5/59694
摘要： A disk drive is disclosed comprising a servo control system operable to actuate a head over a disk. A sensor signal is filtered with a first filter comprising a frequency response, and the filtered sensor signal is filtered to generate a compensated sensor signal. An error signal is filtered with a second filter comprising the frequency response, and an adaptation control signal is generated based on the compensated sensor signal and the filtered error signal. An adaptive filter is adapted in response to the adaptation control signal, wherein the adaptive filter filters the sensor signal to generate feed-forward compensation values. The feed-forward compensation values are applied to the servo control system to compensate for the disturbance. A disturbance signal that represents the disturbance is generated, and the frequency response of the first and second filters is optimized based on the sensor signal and the disturbance signal.
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。用包括频率响应的第一滤波器对传感器信号进行滤波，并且滤波的传感器信号被滤波以产生经补偿的传感器信号。用包括频率响应的第二滤波器对误差信号进行滤波，并且基于经补偿的传感器信号和滤波的误差信号产生自适应控制信号。自适应滤波器适应于自适应控制信号，其中自适应滤波器对传感器信号进行滤波以产生前馈补偿值。前馈补偿值被应用于伺服控制系统以补偿干扰。产生表示干扰的干扰信号，并且基于传感器信号和干扰信号来优化第一和第二滤波器的频率响应。

10. 发明授权

US08953278B1 Disk drive selecting disturbance signal for feed-forward compensation 有权
标题翻译：磁盘驱动器选择用于前馈补偿的干扰信号
公开(公告)号：US08953278B1
公开(公告)日：2015-02-10
申请号：US14253797
申请日：2014-04-15
申请人： Western Digital Technologies, Inc.
发明人： Jianguo Zhou , Wei Xi , Kuang-Yang Tu , Alain Chahwan
IPC分类号： G11B5/596
CPC分类号： 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 plurality of disturbance signals is generated in response to a vibration. A plurality of correlations is generated in response to each disturbance signal and an error signal of the servo control system. At least one of the disturbance signals is selected in response to the correlations. A feed-forward compensation value is generated in response to the selected disturbance signal, and the feed-forward compensation value is 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。响应于振动产生多个干扰信号。响应于每个干扰信号和伺服控制系统的误差信号产生多个相关。响应于相关性来选择至少一个干扰信号。响应于所选择的干扰信号产生前馈补偿值，并且将前馈补偿值应用于伺服控制系统以补偿振动。

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