公开(公告)号：US08531798B1

公开(公告)日：2013-09-10

申请号：US12966474

申请日：2010-12-13

申请人： Wei Xi ,  Abhishek Dhanda ,  Guoxiao Guo ,  Jie Yu

发明人： Wei Xi ,  Abhishek Dhanda ,  Guoxiao Guo ,  Jie Yu

IPC分类号： G11B5/596

CPC分类号： G11B5/5547 ,  G11B5/59627

摘要： A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors that define a plurality of servo tracks, wherein the servo sectors comprise a plurality of servo bursts. A radial velocity of the head is detected relative to the servo tracks. At least two of the servo bursts are read to generate servo burst signals, and the servo burst signals are adjusted in response to the radial velocity of the head. A position error signal is generated for the head in response to the adjusted servo burst signals.

摘要翻译： 公开了一种磁盘驱动器，其包括在盘上致动的磁头，该磁头包括限定多个伺服磁道的多个伺服扇区，其中所述伺服扇区包括多个伺服脉冲串。 相对于伺服磁道检测磁头的径向速度。 读取至少两个伺服脉冲串以产生伺服脉冲串信号，并且响应于磁头的径向速度来调节伺服脉冲串信号。 响应于调整后的伺服脉冲串信号，针对磁头产生位置误差信号。

公开(公告)号：US08737013B2

公开(公告)日：2014-05-27

申请号：US13298241

申请日：2011-11-16

申请人： Jianguo Zhou ,  Wei Xi ,  Kuang-Yang Tu ,  Alain Chahwan

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。

公开(公告)号：US08630059B1

公开(公告)日：2014-01-14

申请号：US13408974

申请日：2012-02-29

申请人： Xu Chen ,  Wei Xi ,  Young-Hoon Kim ,  Kuang-Yang Tu

发明人： Xu Chen ,  Wei Xi ,  Young-Hoon Kim ,  Kuang-Yang Tu

IPC分类号： G11B5/596

CPC分类号： G11B5/59694

摘要： A disk drive comprises a disk, an actuator arm and a servo controller using a position error signal to generate a controller output signal to control the actuator arm. A plant mechanically models at least a portion of the disk drive, receives a control command to which an unknown disturbance is added and generates a plant output. A disturbance observer (DOB) uses the control command and the plant output to generate a delayed and estimated version of the disturbance. The DOB comprises a Q filter having a selected center frequency. A perfect phase cancellation filter (PPCF) is configured to receive the delayed and estimated version of the disturbance, to reject selected disturbances and to align the desired attenuation frequency with the selected center frequency. The output of the PPCF is subtracted from the controller output signal to generate the control command.

摘要翻译： 磁盘驱动器包括盘，致动器臂和使用位置误差信号的伺服控制器，以产生控制器输出信号以控制致动器臂。 工厂对至少一部分磁盘驱动器进行机械建模，接收到添加了未知扰动的控制命令，并生成工厂输出。 干扰观测器（DOB）使用控制命令和设备输出来产生干扰的延迟和估计版本。 DOB包括具有所选中心频率的Q滤波器。 完美相位消除滤波器（PPCF）被配置为接收干扰的延迟和估计版本，以抑制所选择的干扰并将期望的衰减频率与所选择的中心频率对准。 从控制器输出信号中减去PPCF的输出，生成控制命令。

公开(公告)号：US20130120870A1

公开(公告)日：2013-05-16

申请号：US13298241

申请日：2011-11-16

申请人： JIANGUO ZHOU ,  WEI XI ,  KUANG-YANG TU ,  ALAIN CHAHWAN

发明人： JIANGUO ZHOU ,  WEI XI ,  KUANG-YANG TU ,  ALAIN CHAHWAN

IPC分类号： G11B21/02

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。