公开(公告)号：US20080218896A1

公开(公告)日：2008-09-11

申请号：US12017157

申请日：2008-01-21

申请人： Kazuhiko Takaishi ,  Takeshi Hara

发明人： Kazuhiko Takaishi ,  Takeshi Hara

IPC分类号： G11B5/596

CPC分类号： G11B5/09 ,  G11B5/5526 ,  G11B5/59627

摘要： A head position control device uses a current observer control which performs two degree of freedom control, with which a current step difference due to the difference of eccentricities between heads is prevented without affecting the seek waveform after switching heads. The head position control device has a locus generation section, which calculates an initial value of the correction locus for canceling the current step difference of the output current based on an output current supplied to an actuator before switching, and an eccentricity correction current and initial velocity of another head after switching; and a two degree of freedom control system to which a seek locus is input, and supplies a correction locus according to the initial value to the two degree of freedom control system. One parameter can correct the initial velocity and the current step difference.

摘要翻译： 头位置控制装置使用执行两个自由度控制的当前观察者控制，由此防止由于头之间的偏心差引起的电流阶跃差，而不影响切换头之后的搜索波形。 头位置控制装置具有轨迹生成部，其基于在切换前提供给致动器的输出电流来计算用于抵消输出电流的当前阶跃差的校正轨迹的初始值，以及偏心校正电流和初始速度 切换后的另一个头; 以及输入搜索轨迹的两自由度控制系统，并且向两个自由度控制系统提供根据初始值的校正轨迹。 一个参数可以校正初始速度和当前阶跃差。

公开(公告)号：US07564643B2

公开(公告)日：2009-07-21

申请号：US12017157

申请日：2008-01-21

申请人： Kazuhiko Takaishi ,  Takeshi Hara

发明人： Kazuhiko Takaishi ,  Takeshi Hara

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/09 ,  G11B5/5526 ,  G11B5/59627

摘要： A head position control device uses a current observer control which performs two degree of freedom control, with which a current step difference due to the difference of eccentricities between heads is prevented without affecting the seek waveform after switching heads. The head position control device has a locus generation section, which calculates an initial value of the correction locus for canceling the current step difference of the output current based on an output current supplied to an actuator before switching, and an eccentricity correction current and initial velocity of another head after switching; and a two degree of freedom control system to which a seek locus is input, and supplies a correction locus according to the initial value to the two degree of freedom control system. One parameter can correct the initial velocity and the current step difference.

摘要翻译： 头位置控制装置使用执行两个自由度控制的当前观察者控制，由此防止由于头之间的偏心差引起的电流阶跃差，而不影响切换头之后的搜索波形。 头位置控制装置具有轨迹生成部，其基于在切换前提供给致动器的输出电流来计算用于抵消输出电流的当前阶跃差的校正轨迹的初始值，以及偏心校正电流和初始速度 切换后的另一个头; 以及输入搜索轨迹的两自由度控制系统，并且向两个自由度控制系统提供根据初始值的校正轨迹。 一个参数可以校正初始速度和当前阶跃差。

公开(公告)号：US20130194691A1

公开(公告)日：2013-08-01

申请号：US13472238

申请日：2012-05-15

申请人： Takeshi Hara ,  Kazuhiko Takaishi

发明人： Takeshi Hara ,  Kazuhiko Takaishi

IPC分类号： G11B21/02 ,  G11B20/00

CPC分类号： G11B5/5582 ,  G11B5/59627 ,  G11B5/59694

摘要： According to one embodiment, there is provided a magnetic disk device including an acceleration feedforward module, an eccentricity correction module, and a control module. The acceleration feedforward module includes a first amplification module, a second amplification module, and an addition module. The first amplification module amplify a first rotation correlation value according to a rotation component by a first gain. The second amplification module amplifies a second rotation correlation value according to a rotation synchronization component of the rotation component, by a second gain acquired by subtracting the first gain from 1. The addition module adds the first rotation correlation value amplified by the first amplification module and the second rotation correlation value amplified by the second amplification module to obtain the first correction amount.

摘要翻译： 根据一个实施例，提供一种包括加速度前馈模块，偏心校正模块和控制模块的磁盘装置。 加速前馈模块包括第一放大模块，第二放大模块和加法模块。 第一放大模块根据旋转分量将第一旋转相关值放大第一增益。 第二放大模块根据旋转分量的旋转同步分量，通过从1减去第一增益获得的第二增益来放大第二旋转相关值。加法模块将由第一放大模块放大的第一旋转相关值和 所述第二旋转相关值由所述第二放大模块放大以获得所述第一校正量。

公开(公告)号：US08023222B2

公开(公告)日：2011-09-20

申请号：US12568449

申请日：2009-09-28

申请人： Takeshi Hara ,  Kazuhiko Takaishi

发明人： Takeshi Hara ,  Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/596 ,  G11B5/5582

摘要： According to one embodiment, an information storage device includes a recording/reproducing head, a positioning controller, a position detector, a storage module, and a position error detector. The position detector detects the position of the recording/reproducing head. The storage module stores servo control filters. The position error detector generates a new position error signal from a target position and the position of the recording/reproducing head when the positioning controller performs positioning control with control current obtained from a position error signal having passed through each servo control filter. Upon occurrence of a recording/reproducing error, learning to calculate a vibration amount from the position of the recording/reproducing head is sequentially performed for the servo control filters for a predetermined time. The positioning controller performs the positioning control with control current obtained from the position error signal having passed through one of the servo control filters where the vibration amount is smallest.

摘要翻译： 根据一个实施例，信息存储装置包括记录/再现头，定位控制器，位置检测器，存储模块和位置误差检测器。 位置检测器检测记录/再现头的位置。 存储模块存储伺服控制滤波器。 当定位控制器利用从通过每个伺服控制滤波器的位置误差信号获得的控制电流进行定位控制时，位置误差检测器从目标位置和记录/再现头的位置产生新的位置误差信号。 在出现记录/再现错误时，对于伺服控制滤波器，在预定时间内顺序地执行从记录/再现头的位置计算振动量的学习。 定位控制器通过从通过了振动量最小的伺服控制滤波器之一的位置误差信号获得的控制电流进行定位控制。

公开(公告)号：US20100128385A1

公开(公告)日：2010-05-27

申请号：US12568449

申请日：2009-09-28

申请人： Takeshi Hara ,  Kazuhiko Takaishi

发明人： Takeshi Hara ,  Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/596 ,  G11B5/5582

摘要： According to one embodiment, an information storage device includes a recording/reproducing head, a positioning controller, a position detector, a storage module, and a position error detector. The position detector detects the position of the recording/reproducing head. The storage module stores servo control filters. The position error detector generates a new position error signal from a target position and the position of the recording/reproducing head when the positioning controller performs positioning control with control current obtained from a position error signal having passed through each servo control filter. Upon occurrence of a recording/reproducing error, learning to calculate a vibration amount from the position of the recording/reproducing head is sequentially performed for the servo control filters for a predetermined time. The positioning controller performs the positioning control with control current obtained from the position error signal having passed through one of the servo control filters where the vibration amount is smallest.

摘要翻译： 根据一个实施例，信息存储装置包括记录/再现头，定位控制器，位置检测器，存储模块和位置误差检测器。 位置检测器检测记录/再现头的位置。 存储模块存储伺服控制滤波器。 当定位控制器利用从通过每个伺服控制滤波器的位置误差信号获得的控制电流进行定位控制时，位置误差检测器从目标位置和记录/再现头的位置产生新的位置误差信号。 在出现记录/再现错误时，对于伺服控制滤波器在预定时间内顺序执行从记录/再现头的位置计算振动量的学习。 定位控制器通过从通过了振动量最小的伺服控制滤波器之一的位置误差信号获得的控制电流进行定位控制。

公开(公告)号：US08625230B2

公开(公告)日：2014-01-07

申请号：US13370230

申请日：2012-02-09

申请人： Tatsuhiko Kosugi ,  Kazuhiko Takaishi ,  Takeshi Hara ,  Hiroshi Oyabu

发明人： Tatsuhiko Kosugi ,  Kazuhiko Takaishi ,  Takeshi Hara ,  Hiroshi Oyabu

IPC分类号： G11B20/20

CPC分类号： G11B5/59644 ,  G11B20/10222 ,  G11B20/10268 ,  G11B2020/1281 ,  G11B2220/2516

摘要： According to one embodiment, a position demodulator includes a demodulator, a phase corrector, and a position demodulating module. The demodulator demodulates a first demodulated signal and a second demodulated signal having a phase difference of 90 degrees from the first demodulated signal as a result of discrete Fourier transform operation on a read signal of a null servo pattern recorded in a servo area of a medium read out by a head. The phase corrector carries out correction to tilt respective vectors of the first demodulated signal and the second demodulated signal represented on a phase plane by a predetermined angle. The position demodulating module demodulates a positional signal for determining the position of the core of the head based on the first demodulated signal and the second demodulated signal corrected by the phase corrector.

摘要翻译： 根据一个实施例，位置解调器包括解调器，相位校正器和位置解调模块。 解调器作为对记录在介质读取的伺服区域中的无效伺服模式的读取信号的离散傅立叶变换操作的结果，将与第一解调信号相差90度的第一解调信号和第二解调信号解调 出头。 相位校正器执行校正，以将相位平面上表示的第一解调信号和第二解调信号的各矢量倾斜预定角度。 位置解调模块基于由相位校正器校正的第一解调信号和第二解调信号来解调用于确定头的核心的位置的位置信号。

公开(公告)号：US20120293885A1

公开(公告)日：2012-11-22

申请号：US13370230

申请日：2012-02-09

申请人： Tatsuhiko KOSUGI ,  Kazuhiko Takaishi ,  Takeshi Hara ,  Hiroshi Oyabu

发明人： Tatsuhiko KOSUGI ,  Kazuhiko Takaishi ,  Takeshi Hara ,  Hiroshi Oyabu

IPC分类号： G11B5/09

CPC分类号： G11B5/59644 ,  G11B20/10222 ,  G11B20/10268 ,  G11B2020/1281 ,  G11B2220/2516

摘要： According to one embodiment, a position demodulator includes a demodulator, a phase corrector, and a position demodulating module. The demodulator demodulates a first demodulated signal and a second demodulated signal having a phase difference of 90 degrees from the first demodulated signal as a result of discrete Fourier transform operation on a read signal of a null servo pattern recorded in a servo area of a medium read out by a head. The phase corrector carries out correction to tilt respective vectors of the first demodulated signal and the second demodulated signal represented on a phase plane by a predetermined angle. The position demodulating module demodulates a positional signal for determining the position of the core of the head based on the first demodulated signal and the second demodulated signal corrected by the phase corrector.

摘要翻译： 根据一个实施例，位置解调器包括解调器，相位校正器和位置解调模块。 解调器作为对记录在介质读取的伺服区域中的无效伺服模式的读取信号的离散傅立叶变换操作的结果，将与第一解调信号相差90度的第一解调信号和第二解调信号解调 出头。 相位校正器执行校正，以将相位平面上表示的第一解调信号和第二解调信号的各矢量倾斜预定角度。 位置解调模块基于由相位校正器校正的第一解调信号和第二解调信号来解调用于确定头的核心的位置的位置信号。

公开(公告)号：US20090225467A1

公开(公告)日：2009-09-10

申请号：US12421393

申请日：2009-04-09

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B21/02

CPC分类号： G11B5/59627

摘要： A head position control method controls the position of a head by correcting components synchronizing rotation of a disk based on the head control amount. A correction signal for components synchronizing rotation is generated by using a filter function. The filter function that integrates the sine and cosine terms of DFT and inverse DFT and forms multiply of the complex values a(m) and b(m) and sine and cosine for frequency conversion, is measured in advance. The complex values are the m degree of RRO frequencies having frequency characteristics to be multiplied (1+C(z) P(z)) or −(1+C(z) P(z)/P(z)).

摘要翻译： 头位置控制方法通过基于头部控制量校正部件同步盘的旋转来控制头部的位置。 通过使用滤波器功能产生用于组件同步旋转的校正信号。 预先测量将DFT和逆DFT的正弦和余弦项积分并形成复数值a（m）和b（m）的乘法和用于频率转换的正弦和余弦的滤波器函数。 复数值是具有要乘以（1 + C（z）P（z））或 - （1 + C（z）P（z）/ P（z））的频率特性的RRO频率的m度。

公开(公告)号：US07535192B2

公开(公告)日：2009-05-19

申请号：US11485925

申请日：2006-07-13

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G05B11/01

CPC分类号： G11B5/5582 ,  G11B5/596

摘要： A positioning control device executes disturbance observer control having a disturbance suppression function, wherein changes of control characteristics are prevented even if the disturbance frequency is suppressed. When a control value of an actuator is computed using estimated gains of the actuator and estimated gains of disturbance according to an estimated position error by disturbance observer control including a model of the actuator and model of the disturbance, the disturbance frequency is estimated according to the estimated position error, and the estimated gains of the actuator and the estimated gains of the disturbance, corresponding to the disturbance frequency, are changed. Therefore appropriate observer control according to the disturbance frequency can be implemented.

摘要翻译： 定位控制装置执行具有干扰抑制功能的干扰观察者控制，其中即使干扰频率被抑制也能够防止控制特性的改变。 当使用估计的致动器的增益和根据包括致动器的模型和扰动模型的扰动观测器控制的估计位置误差来估计致动器的增益来计算致动器的控制值时，根据 估计位置误差，以及与干扰频率相对应的致动器的估计增益和扰动的估计增益被改变。 因此，可以实现根据干扰频率的适当的观察者控制。

公开(公告)号：US07372658B2

公开(公告)日：2008-05-13

申请号：US11520956

申请日：2006-09-14

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596 ,  G11B21/02 ,  G11B5/55

CPC分类号： G11B5/59627

摘要： A head position control system controls the position of the head by correcting the components synchronizing rotation of the disk from the head control amount, in which an adjusted gain to minimize the components synchronizing rotation after correction is theoretically acquired. An adjusted gain based on the ratio of the magnitude between the components synchronizing rotation of a disk and the components not synchronizing rotation of the disk in the position signals is used. And a gain to minimize RRO after correction can be theoretically determined using an expression to determine RRO after correction. The gain can be determined without depending on experiment, and the value of RRO after correction can be guaranteed, therefore the manufacturing time and the device specifications can be determined.

摘要翻译： 头部位置控制系统通过从头部控制量校正部件同步旋转的部件来控制头部的位置，在头部控制量中理论上获取校正后的调整后的增益以最小化校正后的分量同步旋转。 使用基于同步盘的旋转的组件与不在位置信号中使盘的旋转不同步的组件之间的大小的比率的调整增益。 并且在校正后最小化RRO的增益可以理论上用表达式确定，以在校正后确定RRO。 可以根据实验确定增益，可以保证校正后的RRO值，因此可以确定制造时间和设备规格。