公开(公告)号：US06437936B1

公开(公告)日：2002-08-20

申请号：US09489532

申请日：2000-01-21

申请人： YangQuan Chen ,  LeeLing Tan ,  KianKeong Ooi ,  Qiang Bi ,  KokHiang Cheong

发明人： YangQuan Chen ,  LeeLing Tan ,  KianKeong Ooi ,  Qiang Bi ,  KokHiang Cheong

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A method and apparatus for compensating for written-in repeatable runout in a disc drive is provided. Compensation values are determined through an iterative learning process in which parameters of the learning process such as learning gain, servo loop gain, etc. are functions of the iteration number. The learning process also employs a nominal double integrator model of an actuator of the disc storage system. The learning process is also a function of a zero-phase low-pass filter.

摘要翻译： 提供了用于补偿盘驱动器中的可写入可重复跳动的方法和装置。 通过迭代学习过程来确定补偿值，其中诸如学习增益，伺服循环增益等学习过程的参数是迭代次数的函数。 学习过程还采用盘存储系统的执行器的标称双积分器模型。 学习过程也是零相位低通滤波器的一个功能。

公开(公告)号：US06690534B2

公开(公告)日：2004-02-10

申请号：US09827339

申请日：2001-04-05

申请人： MingZhong Ding ,  YangQuan Chen ,  LeeLing Tan ,  Wing Kong Chiang ,  KianKeong Ooi ,  BengWee Quak

发明人： MingZhong Ding ,  YangQuan Chen ,  LeeLing Tan ,  Wing Kong Chiang ,  KianKeong Ooi ,  BengWee Quak

IPC分类号： G11B5596

CPC分类号： G11B5/5582

摘要： A method of handling multiple resonance frequencies in a disc drive includes monitoring a position error signal (PES) for an actuator arm, generating a plurality of feedforward compensation signals from the PES using a plurality of bandpass filters, and applying the compensation signals to a servo control signal. Each filter has a center frequency that is set to a problematic resonance frequency. The method may also include identifying the problematic frequencies by, for example, commanding a movement of the actuator arm, collecting data points for the PES that are associated with the movement, and performing a digital fourier transform of the data points to identify resonant frequencies. Other methods of identifying problematic frequencies include analyzing PES zero-crossing data, or using principal component analysis.

摘要翻译： 一种在盘驱动器中处理多个共振频率的方法包括监视致动器臂的位置误差信号（PES），使用多个带通滤波器从PES产生多个前馈补偿信号，并将补偿信号施加到伺服 控制信号。 每个滤波器的中心频率被设置为有问题的共振频率。 该方法还可以包括通过例如指令致动器臂的移动来收集有问题的频率，收集与移动相关联的PES的数据点，以及执行数据点的数字傅里叶变换以识别共振频率。 识别有问题频率的其他方法包括分析PES过零数据，或使用主成分分析。

公开(公告)号：US06574067B2

公开(公告)日：2003-06-03

申请号：US09759754

申请日：2001-01-12

申请人： YangQuan Chen ,  MingZhong Ding ,  LinCheng Xiu ,  KianKeong Ooi ,  LeeLing Tan

发明人： YangQuan Chen ,  MingZhong Ding ,  LinCheng Xiu ,  KianKeong Ooi ,  LeeLing Tan

IPC分类号： G11B5596

CPC分类号： G11B5/59605 ,  G11B5/5521

摘要： A repetitive learning compensator for a servo system of a disc drive includes a memory buffer having a length N/m where N is the number of servo sectors in a track, m is a parsing factor greater than 1 and N/m is an integer. A down sampler supplies servo signals containing error signals to the repetitive learning compensator at a frequency of fs/m, where fs is a sampling frequency based on N and a fundamental frequency f0 of the spindle motor. An up sampler supplies filtered signals from the repetitive learning compensator to the actuator assembly at the sampling frequency fs. One aspect of the disclosure includes tuning the repetitive learning compensator with a phase advance represented by NPA and a cutoff frequency fc, where NPA and fc are selected as a pair to provide the greatest transfer function amplitude at the harmonic frequencies for the repetitive learning compensator.

摘要翻译： 用于盘驱动器的伺服系统的重复学习补偿器包括具有长度N / m的存储器缓冲器，其中N是轨道中的伺服扇区的数量，m是大于1的解析因子，N / m是整数。 下采样器以fs / m的频率向重复学习补偿器提供含有误差信号的伺服信号，其中fs是基于N的采样频率和主轴电机的基频f0。 上采样器以重复学习补偿器将滤波信号以采样频率fs提供给执行器组件。 本公开的一个方面包括用由NPA表示的相位提前和截止频率fc来调整重复学习补偿器，其中NPA和fc被选择为一对以在重复学习补偿器的谐波频率处提供最大的传递函数幅度。

公开(公告)号：US06563663B1

公开(公告)日：2003-05-13

申请号：US09474277

申请日：1999-12-29

申请人： Qiang Bi ,  Kevin A. Gomez ,  YangQuan Chen ,  KianKeong Ooi

发明人： Qiang Bi ,  Kevin A. Gomez ,  YangQuan Chen ,  KianKeong Ooi

IPC分类号： G11B5596

CPC分类号： G11B5/59627 ,  G11B5/596

摘要： A disc storage system is provided which includes a servo control loop for compensating for repeatable runout. Repeatable runout is compensated using table entries of the form Comp Value(k+1)=Comp Value(k)+K&PHgr;(z)RRO(k), where K is a learning rate; k is iteration number &PHgr;(z) is a filter and RRO(k) is the repeatable runout error. Further, &rgr;(j&ohgr;)=|1−K&PHgr;(j&ohgr;)/(1+PC(j&ohgr;)|

摘要翻译： 提供了一种盘存储系统，其包括用于补偿可重复跳动的伺服控制回路。 可重复跳动使用Comp Value（k + 1）= Comp Value（k）+ KPHI（z）RRO（k）形式的表条目进行补偿，其中K是学习速率; k是迭代次数PHI（z）是滤波器，RRO（k）是可重复的跳动误差。 此外，需要满足rho（jomega）= | 1-KPHI（jomega）/（1 + PC（jomega）| <1），其中PC（jomega）是伺服环路的开环频率响应，滤波器可以包括 订单过滤器

公开(公告)号：US20050034539A1

公开(公告)日：2005-02-17

申请号：US10814016

申请日：2004-03-31

申请人： LeeLing Tan ,  MingZhong Ding ,  KianKeong Ooi ,  JianYi Wang

发明人： LeeLing Tan ,  MingZhong Ding ,  KianKeong Ooi ,  JianYi Wang

IPC分类号： G11B5/55 ,  G11B21/08 ,  H02P25/02 ,  H02P5/34

CPC分类号： G11B5/5526 ,  G11B21/083 ,  H02P25/034

摘要： Method and apparatus for compensating variations in motor torque in a control system that employs a motor to accelerate a control object, such as a data transducing head in a data storage device. During acceleration of the control object, a plurality of distances successively traveled by the control object are measured, and the measured distances are combined to compensate for said variations in motor torque. Preferably, a constant control input is applied to accelerate the control object at a constant rate of acceleration less than a maximum rate of acceleration that can be obtained by the motor. A coarse adjustment routine is preferably applied to arrive at a first compensation value that compensates for said variations at a first resolution, after which a fine adjustment routine is performed using the first compensation value to arrive at the final compensation value at a second resolution greater than the first resolution.

摘要翻译： 用于补偿使用电动机来加速诸如数据存储装置中的数据转换头的控制对象的控制系统中的电动机转矩变化的方法和装置。 在控制对象的加速期间，测量由控制对象相继行进的多个距离，并且组合所测量的距离以补偿所述电动机转矩的变化。 优选地，施加恒定的控制输入以以小于由电动机可以获得的最大加速速率的恒定加速度加速控制对象。 优选地应用粗调程序以获得以第一分辨率补偿所述变化的第一补偿值，之后使用第一补偿值执行微调程序，以大于第二分辨率的第二分辨率得到最终补偿值 第一个决议。

公开(公告)号：US06687065B2

公开(公告)日：2004-02-03

申请号：US09778472

申请日：2001-02-07

申请人： LeeLing Tan ,  MingZhong Ding ,  WeeMeng Yio ,  KianKeong Ooi ,  KokHoe Chia

发明人： LeeLing Tan ,  MingZhong Ding ,  WeeMeng Yio ,  KianKeong Ooi ,  KokHoe Chia

IPC分类号： G11B2736

CPC分类号： G11B27/36 ,  G11B21/106 ,  G11B2220/20

摘要： A disc drive includes a base and a disc rotatably attached to the base. The disc drive also includes an actuator assembly rotatably attached to said base and a device for moving the actuator assembly. The actuator assembly includes an actuator arm and a transducer head in a transducing relationship with respect to the disc. The transducer is attached to the actuator arm. A method for screening disc drives for resonant frequencies associated with the actuator arm includes the steps of following a track within the disc drive, and selectively boosting the servo control signal. The method further includes a step of monitoring a position error signal from a transducer attached to an actuator arm of a disc drive. The position error signal is monitored by filtering the position error signal using a bandpass filter. Boosting the servo control loop includes tuning the magnitude of the booster signal gain.

摘要翻译： 盘驱动器包括基座和可旋转地附接到基座的盘。 盘驱动器还包括可旋转地附接到所述基座的致动器组件和用于移动致动器组件的装置。 致动器组件包括致动器臂和相对于盘的换能关系的换能器头。 传感器连接到执行器臂。 用于筛选与致动器臂相关联的谐振频率的盘驱动器的方法包括跟随盘驱动器内的轨道并且选择性地升高伺服控制信号的步骤。 该方法还包括监测来自附接到盘驱动器的致动器臂的换能器的位置误差信号的步骤。 通过使用带通滤波器对位置误差信号进行滤波来监视位置误差信号。 升压伺服控制回路包括调整升压信号增益的幅度。

公开(公告)号：US06704159B2

公开(公告)日：2004-03-09

申请号：US09810337

申请日：2001-03-16

申请人： MingZhong Ding ,  KianKeong Ooi ,  YangQuan Chen ,  Jack Ming Teng ,  ShuangQuan Min ,  Beng Wee Quak

发明人： MingZhong Ding ,  KianKeong Ooi ,  YangQuan Chen ,  Jack Ming Teng ,  ShuangQuan Min ,  Beng Wee Quak

IPC分类号： G11B5596

CPC分类号： G11B21/02 ,  G11B19/28

摘要： A method of implementing an automatic acoustic management feature for a disc drive includes receiving an acoustic/performance compromising factor from a host, tuning disc drive performance by applying the factor to a control parameter to generate a modified control parameter, and executing a loop for controlling a disc drive operation using the modified control parameter. In another embodiment, a disc drive has a base, a rotatable disc, an actuator assembly with an arm for carrying a head in transducing relation to the disc in response to a control signal, a receiver for receiving an acoustic/performance compromising factor, and a controller that monitors the position of the arm and generates the control signal. The controller executes a seeking control loop having a control parameter modified by applying a compromising factor to the parameter to tune the acoustic performance of the drive.

摘要翻译： 实现用于盘驱动器的自动声学管理特征的方法包括从主机接收声学/性能损害因子，通过将因子应用于控制参数来产生修改的控制参数来调谐盘驱动器性能，以及执行用于控制的循环 使用修改的控制参数的盘驱动器操作。 在另一个实施例中，盘驱动器具有底座，可旋转盘，具有臂的致动器组件，用于响应于控制信号而承载头与盘转换的关系，接收器用于接收声学/性能损害因子，以及 监控臂的位置并产生控制信号的控制器。 控制器执行寻道控制回路，其具有通过对参数应用折中因子而修正的控制参数，以调节驱动器的声学性能。

公开(公告)号：US06674607B2

公开(公告)日：2004-01-06

申请号：US09873752

申请日：2001-06-04

申请人： KianKeong Ooi ,  WingKong Chiang ,  Lincheng Xiu ,  SiokYin Tan ,  YangQuan Chen

发明人： KianKeong Ooi ,  WingKong Chiang ,  Lincheng Xiu ,  SiokYin Tan ,  YangQuan Chen

IPC分类号： G11B5596

CPC分类号： G11B5/59622 ,  G11B5/59627

摘要： A method and storage device are provided for initializing a polynomial linearizer in the storage device. The linearizer is initialized by identifying the coefficients of the linearizer polynomial. To reduce the computational intensity of this process, orthogonal-type coefficients for at least two orthogonal polynomials are identified, where the linearizer polynomial is formed as the sum of the orthogonal polynomials. The orthogonal-type coefficients are then combined to identify linearizer coefficients for the linearizer polynomial.

摘要翻译： 提供一种用于在存储装置中初始化多项式线性化装置的方法和存储装置。 通过识别线性化多项式的系数来初始化线性化器。 为了减少该过程的计算强度，识别用于至少两个正交多项式的正交类型系数，其中线性化多项式形成为正交多项式的和。 然后将正交型系数组合以识别线性化多项式的线性化系数。

公开(公告)号：US06674589B2

公开(公告)日：2004-01-06

申请号：US09792654

申请日：2001-02-23

申请人： ShuangQuan Min ,  Ricky Wei Watt Yeo ,  KianKeong Ooi ,  MingZhong Ding ,  YangQuan Chen

发明人： ShuangQuan Min ,  Ricky Wei Watt Yeo ,  KianKeong Ooi ,  MingZhong Ding ,  YangQuan Chen

IPC分类号： G11B2736

CPC分类号： G11B27/36 ,  G11B5/59627 ,  G11B2220/20

摘要： A disc drive device includes a base and a disc rotatably attached to the base. The disc drive also includes an actuator assembly rotatably attached to said base and a device for moving the actuator assembly. The actuator assembly includes an actuator arm and a transducer head in a transducing relationship with respect to the disc. The transducer is attached to the actuator arm. A method of screening disc drives for harmonic resonant frequencies includes sampling the position error signal at a track location in the disc drive, and determining the velocity of the position error signal from the sample of the position error signal. The velocity of the position error signal sample is divided by the position error signal to produce a quotient. The quotient is compared to a selected quotient threshold value to determine the type of a harmonic in the disc drive.

摘要翻译： 盘驱动装置包括基座和可旋转地附接到基座的盘。 盘驱动器还包括可旋转地附接到所述基座的致动器组件和用于移动致动器组件的装置。 致动器组件包括致动器臂和相对于盘的换能关系的换能器头。 传感器连接到执行器臂。 筛选用于谐波谐振频率的盘驱动器的方法包括对盘驱动器中的轨道位置处的位置误差信号进行采样，以及从位置误差信号的样本确定位置误差信号的速度。 位置误差信号采样的速度被位置误差信号除以产生商。 将商与所选商门限值进行比较，以确定盘驱动器中谐波的类型。

公开(公告)号：US06324890B1

公开(公告)日：2001-12-04

申请号：US09584563

申请日：2000-05-31

申请人： Ricky Wei Watt Yeo ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  MingZhong Ding ,  YangQuan Chen ,  Beng Wee Quak

发明人： Ricky Wei Watt Yeo ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  MingZhong Ding ,  YangQuan Chen ,  Beng Wee Quak

IPC分类号： G01N3312

CPC分类号： G01N19/02

摘要： A method of characterizing and screening a disc drive based on a voice coil motor pivot friction developed during a low velocity seek operation consists of determining estimated drive level bias values required by the voice coil motor to move an actuator arm assembly during a fast seek, then determining a low velocity drive level bias values required by the voice coil motor to move an actuator arm assembly during a slow seek, then computing a difference between the estimate drive level bias values and the low velocity drive level bias values, then determining a hit counter value based on comparing the computed difference with a predetermined threshold value, and then characterizing the disc drive based on the hit counter value.

摘要翻译： 基于在低速搜索操作期间产生的音圈电动机枢转摩擦来表征和筛选磁盘驱动器的方法包括确定音圈电机在快速寻找期间移动致动器臂组件所需的估计的驱动电平偏置值，然后 确定音速电动机在慢速寻找期间移动致动器臂组件所需的低速驱动电平偏置值，然后计算估计驱动电平偏置值和低速驱动电平偏置值之间的差，然后确定命中计数器 基于计算出的差异与预定阈值进行比较，然后基于命中计数器值表征盘驱动器的值。