公开(公告)号：US20100328804A1

公开(公告)日：2010-12-30

申请号：US12821017

申请日：2010-06-22

申请人： Satoshi YAMASHITA ,  Kazuhiko TAKAISHI

发明人： Satoshi YAMASHITA ,  Kazuhiko TAKAISHI

IPC分类号： G11B5/09

CPC分类号： G11B5/09 ,  G11B5/59616

摘要： According to one embodiment, a magnetic disk storage device includes a magnetic disk, a head, a clock generator, an estimating module, and a controller. The magnetic disk includes a servo area and a corresponding data area, and has a surface divided into zones in the radial direction. The basic frequency varies in the servo area depending on the zones. The head is driven to read a signal from the magnetic disk. The clock generator generates a clock signal for decoding a signal read from the data area corresponding to the servo area based on a signal read from the servo area. The estimating module estimates the position of the servo area in the radial direction, from which the head reads a signal next. The controller controls the clock generator to generate a clock signal of the basic frequency before the head reaches the servo area based on the estimated position.

摘要翻译： 根据一个实施例，磁盘存储装置包括磁盘，磁头，时钟发生器，估计模块和控制器。 磁盘包括伺服区域和对应的数据区域，并且具有被分成径向方向的区域的表面。 伺服区域的基本频率根据区域而异。 磁头被驱动以从磁盘读取信号。 时钟发生器基于从伺服区读取的信号，生成用于对与伺服区对应的数据区读取的信号进行解码的时钟信号。 估计模块估计伺服区域在径向上的位置，头从头读取信号。 控制器控制时钟发生器，以根据估计的位置在头到达伺服区之前产生基本频率的时钟信号。

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。

公开(公告)号：US20080080087A1

公开(公告)日：2008-04-03

申请号：US11789789

申请日：2007-04-25

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/5547

摘要： In a seek control device based on a current observer control which performs two degree of freedom control, a current step difference to be generated when seek control is switched to following control is prevented. When seek control is switched to following control, a current step difference cancellation trajectory generation section calculates a current value Udiff for the amount of the step difference based on a difference between current values u(n) and u(n−1), and supplies a target position trajectory r′(n) (or target current trajectory) for offsetting this calculated value to a following controller. Therefore the current step difference of the output current is cancelled.

公开(公告)号：US07352526B2

公开(公告)日：2008-04-01

申请号：US11455463

申请日：2006-06-19

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： A storage device has a separate type magnetic head and a discrete type magnetic recording medium on which recording tracks and recording disabled areas are alternately formed. An accurate offset of the magnetic head with respect to the magnetic recording medium is measured even if the widths of the elements of the separate type head differ. While changing the write position and read position of a magnetic recording head, a write element writes measurement data to a magnetic recording medium, a read element reads the written measurement data, and the signal quality is measured and the write offset value and the read offset value are calculated from the inflexion points of a contour line on the two-dimensional map on the measured signal quality. Even if the widths of the write element and the read element differ depending on the individual magnetic recording head, an offset with respect to the separated recording tracks can be accurately measured.

摘要翻译： 存储装置具有单独型磁头和分立式磁记录介质，其上交替地形成有记录轨道和记录禁用区域。 即使分离型头部的元件的宽度不同，也测量磁头相对于磁记录介质的精确偏移。 在改变磁记录头的写入位置和读取位置的同时，写入元件将测量数据写入磁记录介质，读取元件读取写入的测量数据，测量信号质量，读取偏移值和读取偏移量 值根据测量信号质量在二维图上的轮廓线的拐点计算。 即使写入元件和读取元件的宽度根据各个磁记录头而不同，也可以精确地测量相对于分离的记录轨道的偏移。

公开(公告)号：US20080065240A1

公开(公告)日：2008-03-13

申请号：US11789784

申请日：2007-04-25

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G05B13/02

CPC分类号： G11B5/596 ,  G11B5/5582 ,  G11B5/59688

摘要： In a position control device having a disturbance suppression function, loop gain is calibrated without stopping disturbance suppression control. The position control device has, for disturbance suppression control, a feedback controller for changing the loop characteristic, a table for storing a target gain according to a disturbance frequency, and a gain calibration section for calibrating open loop gain. The gain is calibrated using a target gain in the table according to the change of the loop characteristic of the feedback controller. Open loop gain can be calibrated without interrupting the disturbance suppression control, so the open loop gain can be accurately calibrated without being affected by disturbance, and accurate position control is possible.

摘要翻译： 在具有干扰抑制功能的位置控制装置中，校准环路增益而不停止干扰抑制控制。 位置控制装置具有用于干扰抑制控制的用于改变环路特性的反馈控制器，用于根据干扰频率存储目标增益的表以及用于校准开环增益的增益校准部分。 根据反馈控制器的环路特性的变化，使用表中的目标增益来校正增益。 开环增益可以在不中断干扰抑制控制的情况下进行校准，因此可以在不受干扰影响的情况下精确校准开环增益，并可进行精确的位置控制。

公开(公告)号：US20070211372A1

公开(公告)日：2007-09-13

申请号：US11475748

申请日：2006-06-27

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/556 ,  G11B5/5582

摘要： The present invention provides a positioning control device and a disk device for shortening a calculation delay time. Upon detection of a position signal from a demodulation circuit, an MCU of the disk device calculates a position error, and following calculation of a control amount, executes determination and correction processing. A variable value prior to the start of calculation is stored in a save area of a memory (or a save memory) such that when the variable value is to be reset as a result of the determination and correction processing, the variable value is read from the save area, the reset variable value is stored in an overwrite area of the memory (or an overwrite memory), and calculation of the control amount is re-executed.

摘要翻译： 本发明提供了一种用于缩短计算延迟时间的定位控制装置和盘装置。 在检测到来自解调电路的位置信号时，盘装置的MCU计算位置误差，并且在控制量的计算之后，执行确定和校正处理。 在计算开始之前的可变值存储在存储器（或存储存储器）的保存区域中，使得当作为确定和校正处理的结果来复位可变值时，从 保存区域，复位变量值被存储在存储器（或重写存储器）的重写区域中，并且重新执行控制量的计算。

公开(公告)号：US20060098330A1

公开(公告)日：2006-05-11

申请号：US11086520

申请日：2005-03-22

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596

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：US07027254B2

公开(公告)日：2006-04-11

申请号：US09742979

申请日：2000-12-20

申请人： Kazuhiko Takaishi

发明人： Kazuhiko Takaishi

IPC分类号： G11B5/596

CPC分类号： G11B5/596 ,  G11B5/5521

摘要： A disk device for positioning a head to read a disk medium at a predetermined position demodulates accurate demodulation positions even when the head is moving. In a disk device that includes a disk medium, a head, an actuator and a control circuit, the demodulation result is determined from the position signal of the head and speed is corrected by a correction value which depends on the moving speed of the head. Since the speed is corrected, accurate positions can be demodulated even when the head is moving.

摘要翻译： 用于定位头部以在预定位置读取磁盘介质的磁盘装置即使当磁头移动时也能解调精确的解调位置。 在包括盘介质，头，致动器和控制电路的盘装置中，根据头的位置信号确定解调结果，并且通过取决于头的移动速度的校正值校正速度。 由于速度被校正，即使头部移动，也可以解调精确的位置。