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：US07626782B1

公开(公告)日：2009-12-01

申请号：US12178512

申请日：2008-07-23

申请人： Jie Yu ,  Kuang-Yang Tu ,  Young-Hoon Kim ,  Wei Xi

发明人： Jie Yu ,  Kuang-Yang Tu ,  Young-Hoon Kim ,  Wei Xi

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/5534 ,  G11B5/5547

摘要： A disk drive is disclosed operable to seek a head from a first radial location over a disk to a second radial location over the disk. A reference signal is initialized, a feed-forward control signal is initialized, and a seek is initiated. During the seek operation, a position error signal (PES) is generated and saved, wherein the PES represents a position error of the head relative to the reference signal. The PES is filtered with a compensation filter to generate a feed-back control signal. The feed-back control signal is combined with the feed-forward control signal to generate a VCM control signal. When the seek is done, the saved PES is processed using an iterative learning control (ILC) algorithm to adjust at least one of the reference signal and the feed-forward control signal.

摘要翻译： 公开了一种磁盘驱动器，其可操作以从磁盘上的第一径向位置到盘上的第二径向位置寻找磁头。 初始化参考信号，初始化前馈控制信号，并启动寻道。 在寻道操作期间，产生并保存位置误差信号（PES），其中PES表示头相对于参考信号的位置误差。 用补偿滤波器对PES进行滤波以产生反馈控制信号。 反馈控制信号与前馈控制信号组合以产生VCM控制信号。 当搜索完成时，使用迭代学习控制（ILC）算法处理保存的PES，以调整参考信号和前馈控制信号中的至少一个。

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：US20170092151A1

公开(公告)日：2017-03-30

申请号：US14864370

申请日：2015-09-24

申请人： Wei Xi ,  Rui Huang

发明人： Wei Xi ,  Rui Huang

IPC分类号： G09B19/06 ,  G09B5/06 ,  G09B7/00

CPC分类号： G09B19/06 ,  G09B5/06 ,  G09B7/00 ,  G09B7/04

摘要： A second language instruction system enabling a user to learn a second language through one or more life-like scenarios in a virtual world. The second language instruction system includes a computing device in electrical communication with a server via a network, the computing device is configured to assess the second language abilities of the user, receive one or more scenario preferences of the user, and generate a customized learning syllabus at least partially based on the assessed second language abilities of the user and the received one or more scenario preferences of the user, portions of the customized learning syllabus are downloaded for use and deleted after completion to minimize the amount of data stored on the computing device.

公开(公告)号：US09369890B2

公开(公告)日：2016-06-14

申请号：US14355320

申请日：2012-07-31

申请人： Satoshi Nagata ,  Yoshihisa Kishiyama ,  Anass Benjebbour ,  Wei Xi

发明人： Satoshi Nagata ,  Yoshihisa Kishiyama ,  Anass Benjebbour ,  Wei Xi

IPC分类号： H04W24/00 ,  H04W24/02 ,  H04J1/00 ,  H04J11/00 ,  H04L1/00 ,  H04L5/00 ,  H04W72/04 ,  H04B17/345 ,  H04L1/20

CPC分类号： H04W24/02 ,  H04B17/345 ,  H04J1/00 ,  H04J11/00 ,  H04L1/0001 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/20 ,  H04L5/0051 ,  H04L5/0094 ,  H04W72/0473

摘要： To increase the number of CSI-RSs for interference measurement to improve interference measurement accuracy, a first reference signal for channel state measurement and a second reference signal for interference measurement are assigned to reference signal resources defined for transmission of the first reference signal, and a mobile terminal apparatus that supports both the first reference signal and the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal and the second reference signal. A second mobile terminal apparatus that supports the first reference signal and that does not support the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal, and of assignment information indicating that resources assigned the second reference signal are assigned a third reference signal of zero power for channel state measurement.

摘要翻译： 为了增加用于干扰测量的CSI-RS的数量以改善干扰测量精度，将用于信道状态测量的第一参考信号和用于干扰测量的第二参考信号分配给用于传输第一参考信号的参考信号资源，以及 通知支持第一参考信号和第二参考信号的移动终端装置，以识别图形信息，以识别第一参考信号和第二参考信号的分配模式。 通知支持第一参考信号并且不支持第二参考信号的第二移动终端设备，用于识别第一参考信号的分配模式的模式信息，以及指示分配给第二参考信号的资源的分配信息被分配 用于通道状态测量的零功率的第三参考信号。

公开(公告)号：US20140307576A1

公开(公告)日：2014-10-16

申请号：US14355320

申请日：2012-07-31

申请人： Satoshi Nagata ,  Yoshihisa Kishiyama ,  Anass Benjebbour ,  Wei Xi

发明人： Satoshi Nagata ,  Yoshihisa Kishiyama ,  Anass Benjebbour ,  Wei Xi

IPC分类号： H04W24/02 ,  H04W72/04

CPC分类号： H04W24/02 ,  H04B17/345 ,  H04J1/00 ,  H04J11/00 ,  H04L1/0001 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/20 ,  H04L5/0051 ,  H04L5/0094 ,  H04W72/0473

摘要： To increase the number of CSI-RSs for interference measurement to improve interference measurement accuracy, a first reference signal for channel state measurement and a second reference signal for interference measurement are assigned to reference signal resources defined for transmission of the first reference signal, and a mobile terminal apparatus that supports both the first reference signal and the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal and the second reference signal. A second mobile terminal apparatus that supports the first reference signal and that does not support the second reference signal is notified of pattern information to identify an assignment pattern of the first reference signal, and of assignment information indicating that resources assigned the second reference signal are assigned a third reference signal of zero power for channel state measurement.

摘要翻译： 为了增加用于干扰测量的CSI-RS的数量以改善干扰测量精度，将用于信道状态测量的第一参考信号和用于干扰测量的第二参考信号分配给用于传输第一参考信号的参考信号资源，以及 通知支持第一参考信号和第二参考信号的移动终端装置，以识别图形信息，以识别第一参考信号和第二参考信号的分配模式。 通知支持第一参考信号并且不支持第二参考信号的第二移动终端设备，用于识别第一参考信号的分配模式的模式信息，以及指示分配给第二参考信号的资源的分配信息被分配 用于通道状态测量的零功率的第三参考信号。

公开(公告)号：US08724254B1

公开(公告)日：2014-05-13

申请号：US13104835

申请日：2011-05-10

申请人： Shan Tang ,  Jianjun Li ,  Jianguo Zhou ,  Wei Xi

发明人： Shan Tang ,  Jianjun Li ,  Jianguo Zhou ,  Wei Xi

IPC分类号： G11B5/596 ,  G11B5/54

CPC分类号： G11B5/5552 ,  G11B5/596

摘要： A method of evaluating a dual stage actuator (DSA) servo loop in a disk drive is disclosed. The disk drive comprises a dual stage actuator (DSA) servo loop operable to actuate a head over a disk surface. A first sinusoidal signal A1 is added to a VCM control signal B1 generated by a VCM servo loop. A response of the VCM control signal B1 to the first sinusoidal signal A1 is measured, and a closed loop response of the VCM servo loop is computed in response to A1 and B1. A second sinusoidal signal A2 is added to a microactuator control signal B2 generated by a microactuator servo loop. A response of the microactuator control signal B2 to the second sinusoidal signal A2 is measured, and a closed loop response of the microactuator servo loop is computed in response to A2 and B2.

摘要翻译： 公开了一种评估磁盘驱动器中的双级致动器（DSA）伺服环路的方法。 磁盘驱动器包括可操作以在磁盘表面上致动磁头的双级致动器（DSA）伺服回路。 将第一正弦信号A1加到由VCM伺服回路产生的VCM控制信号B1中。 测量VCM控制信号B1对第一正弦信号A1的响应，并根据A1和B1计算VCM伺服回路的闭环响应。 第二正弦信号A2被添加到由微致动器伺服回路产生的微致动器控制信号B2。 测量微致动器控制信号B2对第二正弦信号A2的响应，并响应于A2和B2计算微致动器伺服回路的闭环响应。

公开(公告)号：US08693134B1

公开(公告)日：2014-04-08

申请号：US13167062

申请日：2011-06-23

申请人： Wei Xi ,  Sanghoon Chu

发明人： Wei Xi ,  Sanghoon Chu

IPC分类号： G11B5/596 ,  G11B5/09

CPC分类号： G11B5/59627

摘要： A disk drive is disclosed comprising a disk, a head actuated over the disk, and a controller. The disk comprises a plurality of data tracks and a plurality of servo wedges, wherein each servo wedge comprises a plurality of wedge repeatable runout (WRRO) fields in a circumferential direction, each of the plurality of WRRO fields including an WRRO compensation value for a different one of the data tracks and having a width that is wider than a width of the respective data track in a radial direction. The controller is configured to read the WRRO compensation value in at least one of the WRRO fields from the disk using the head, and to adjust a position of the head based on the read WRRO compensation value.

摘要翻译： 公开了一种磁盘驱动器，其包括盘，在盘上致动的头和控制器。 盘包括多个数据轨道和多个伺服楔块，其中每个伺服楔块包括沿圆周方向的多个楔形可重复跳动（WRRO）场，多个WRRO场中的每一个包括用于不同的WRRO补偿值 数据轨道之一并且具有比径向上的相应数据轨道的宽度宽的宽度。 控制器被配置为使用磁头从盘读取至少一个WRRO磁场中的WRRO补偿值，并且根据读取的WRRO补偿值来调整磁头的位置。

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：US08885283B1

公开(公告)日：2014-11-11

申请号：US13288125

申请日：2011-11-03

申请人： Alain Chahwan ,  Jianguo Zhou ,  Wei Xi

发明人： Alain Chahwan ,  Jianguo Zhou ,  Wei Xi

IPC分类号： G11B21/02

CPC分类号： G11B19/042 ,  G11B5/5582

摘要： A disk drive is disclosed comprising a head actuated over a disk having a plurality of data tracks. A vibration is detected, and a write operation is configured to write a first plurality of blocks and a second plurality of blocks to a target data track based on the detected vibration. The first plurality of blocks are written to the target data track during a first revolution of the disk, and the second plurality of blocks are written to the target data track during a second revolution of the disk.

摘要翻译： 公开了一种磁盘驱动器，包括在具有多个数据磁道的盘上致动的磁头。 检测振动，并且写入操作被配置为基于检测到的振动将第一多个块和第二多个块写入目标数据轨道。 在盘的第一次旋转期间，将第一组多个块写入目标数据轨道，并且在盘的第二次旋转期间将第二多个块写入目标数据轨道。