公开(公告)号：US08773797B2

公开(公告)日：2014-07-08

申请号：US13443025

申请日：2012-04-10

申请人： Naoki Tagami ,  Kazuto Kashiwagi ,  Takayuki Kawabe

发明人： Naoki Tagami ,  Kazuto Kashiwagi ,  Takayuki Kawabe

IPC分类号： G11B20/16

CPC分类号： G11B5/59616 ,  G11B5/746 ,  G11B20/10222 ,  G11B2220/2516

摘要： According to one embodiment, there is provided an information recording apparatus that writes information onto a magnetic recording medium including a plurality of fine magnetic grains. The information recording apparatus includes a random number generation unit, a modulation unit, and a processing unit. The random number generation unit generates a random number bit value. The modulation unit modulates a period of a basic clock according to the random number bit value generated, and generates a modulated clock. The processing unit writes or reads information with respect to the magnetic recording medium in synchronization with the modulated clock generated.

摘要翻译： 根据一个实施例，提供了一种信息记录装置，其将信息写入到包括多个细小颗粒的磁记录介质上。 信息记录装置包括随机数生成单元，调制单元和处理单元。 随机数生成单元生成随机数位值。 调制单元根据生成的随机数位值来调制基本时钟的周期，并生成调制时钟。 处理单元与生成的调制时钟同步地写入或读取关于磁记录介质的信息。

公开(公告)号：US08699163B2

公开(公告)日：2014-04-15

申请号：US13551343

申请日：2012-07-17

申请人： Kazuto Kashiwagi ,  Takayuki Kawabe

发明人： Kazuto Kashiwagi ,  Takayuki Kawabe

IPC分类号： G11B5/09

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5547 ,  G11B20/10527 ,  G11B2020/1062 ,  G11B2220/2516

摘要： According to one embodiment, there is provided a method of temporarily storing data in a buffer. The method determines whether data written based on sequential writing is of a first type or a second type in data type. The method stores the written data in association with the determined data type in the buffer. The method further controls the buffer so that the data of the first type stored in the buffer may be held in the buffer for a length of time twice as long as time T1 corresponding to one revolution of a disk and the data of the second type stored in the buffer may be held in the buffer for the time T1.

摘要翻译： 根据一个实施例，提供了一种在缓冲器中临时存储数据的方法。 该方法确定基于顺序写入写入的数据是数据类型中的第一类型还是第二类型。 该方法将写入的数据与确定的数据类型相关联地存储在缓冲器中。 该方法进一步控制缓冲器，使得存储在缓冲器中的第一类型的数据可以被保持在缓冲器中的时间长度与盘的一圈相对应的时间T1的两倍，并且存储第二类型的数据 在缓冲区中可能会在缓冲区中保存T1。

公开(公告)号：US20130182348A1

公开(公告)日：2013-07-18

申请号：US13551343

申请日：2012-07-17

申请人： Kazuto KASHIWAGI ,  Takayuki Kawabe

发明人： Kazuto KASHIWAGI ,  Takayuki Kawabe

IPC分类号： G11B5/09

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5547 ,  G11B20/10527 ,  G11B2020/1062 ,  G11B2220/2516

摘要： According to one embodiment, there is provided a method of temporarily storing data in a buffer. The method determines whether data written based on sequential writing is of a first type or a second type in data type. The method stores the written data in association with the determined data type in the buffer. The method further controls the buffer so that the data of the first type stored in the buffer may be held in the buffer for a length of time twice as long as time T1 corresponding to one revolution of a disk and the data of the second type stored in the buffer may be held in the buffer for the time T1.

摘要翻译： 根据一个实施例，提供了一种在缓冲器中临时存储数据的方法。 该方法确定基于顺序写入写入的数据是数据类型中的第一类型还是第二类型。 该方法将写入的数据与确定的数据类型相关联地存储在缓冲器中。 该方法进一步控制缓冲器，使得存储在缓冲器中的第一类型的数据可以被保持在缓冲器中的时间长度与盘的一圈相对应的时间T1的两倍，并且存储第二类型的数据 在缓冲区中可能会在缓冲区中保存T1。

公开(公告)号：US20090231749A1

公开(公告)日：2009-09-17

申请号：US12328524

申请日：2008-12-04

申请人： Takayuki Kawabe

发明人： Takayuki Kawabe

IPC分类号： G11B15/18

CPC分类号： G11B5/59655 ,  G11B5/59688

摘要： A drive section which moves a head above an information storage medium and a control section are provided, and each track on the information storage medium is made up of alternating first regions for writing in and reading out user information and second regions that store information for the positioning of the head. The control section is provided with a feedback control value determining section for eliminating the difference between the head position and the representative position of the first region, which is an access object, a performing control value determining section for determining the performing control value for the performing control by finding the logical control value associated with the first region where the feedback control value is determined and adding the feedback control value to this logical control value and a performing control section for actually controlling the drive section.

摘要翻译： 提供了将信息存储介质和控制部分上的磁头移动的驱动部分，并且信息存储介质上的每个磁道由用于写入和读出用户信息的交替的第一区域和存储用于存储信息的信息的第二区域 头部定位。 控制部设置有反馈控制值确定部，用于消除作为访问对象的第一区域的头部位置和代表性位置之间的差异;执行控制值确定部分，用于确定执行控制值的执行控制值 通过找到与确定反馈控制值的第一区域相关联的逻辑控制值并将反馈控制值加到该逻辑控制值来控制，以及执行控制部分，用于实际控制驱动部分。

公开(公告)号：US20080312891A1

公开(公告)日：2008-12-18

申请号：US12127407

申请日：2008-05-27

申请人： Tsugito Maruyama ,  Takayuki Kawabe ,  Shinji Hara ,  Keitaro Ohno

发明人： Tsugito Maruyama ,  Takayuki Kawabe ,  Shinji Hara ,  Keitaro Ohno

IPC分类号： G06G7/48

CPC分类号： G05B13/042 ,  G06F17/5009

摘要： A control system is designed in which a controlled plant is controlled based on output feedback from the controlled plant. An all-pass filter is modeled that is formed of a synthesis of a notch filter compensating for a resonance mode in the control system and the resonance mode. A design controlled plant including the all-pass filter is determined. A controller controls the design controlled plant and includes a weighting function, and, after the weighting function is derived, gain of the weighting function is adjusted using desired gain crossover frequency and phase margin. A phase variable included in a phase-lead weight is determined, and thus the weighting function is determined. H∞ loop shaping is applied to the weighting function and the design controlled plant to obtain an H∞ loop controller.

摘要翻译： 设计了一种控制系统，其中受控设备基于受控设备的输出反馈进行控制。 对全通滤波器进行建模，其由在控制系统和谐振模式中的谐振模式补偿的陷波滤波器的合成形成。 确定包括全通滤波器的设计控制设备。 控制器控制设计控制的设备并且包括加权函数，并且在导出加权函数之后，使用期望的增益交叉频率和相位裕度来调整加权函数的增益。 确定包括在相位重量中的相位变量，从而确定加权函数。 H∞环形整形应用于加权函数和设计控制工厂，以获得H∞回路控制器。

公开(公告)号：US06628579B2

公开(公告)日：2003-09-30

申请号：US09454627

申请日：1999-12-06

申请人： Ichiro Watanabe ,  Takayuki Kawabe

发明人： Ichiro Watanabe ,  Takayuki Kawabe

IPC分类号： G11B700

CPC分类号： G11B7/095 ,  G11B5/59627 ,  G11B21/106

摘要： A learning control unit is provided between a feedback calculating unit and a driving unit. When a period for one medium rotation period is assumed to be TL, an unknown drive current function Irepeat(t) which repeats for a period of time from a start time t=0 for one medium rotation period to an end time t=TL is obtained by a learning algorithm as an approximated function I{circumflex over ( )}repeat(t) that is approximately presumed by a set of the heights Ci of N rectangular functions having interval numbers i=0˜ (N−1) whose time widths are obtained by dividing the period for one medium rotation period into N intervals. After the learning, a learning control signal I{circumflex over ( )}repeat is outputted synchronously with the medium rotation and a feed-forward control is performed. The learning control unit can be provided between a position signal detecting unit and a feedback calculating unit and can learn a position function TESrepeat(t) as an approximated function TES{circumflex over ( )}repeat(t) in a similar manner.

摘要翻译： 学习控制单元设置在反馈计算单元和驱动单元之间。 当一个中等旋转周期的周期被假设为TL时，从一个中间旋转周期到结束时间t = TL的开始时间t = 0重复一段时间的未知驱动电流函数Irepeat（t）是 通过学习算法获得的近似函数I repeat（t），其近似假设为具有间隔数为i = 0〜（N-1）的N个矩形函数的高度Ci的集合，其中时间宽度是通过将周期 对于一个中等旋转周期到N个间隔。 在学习之后，与介质旋转同步地输出学习控制信号I repeat，并且执行前馈控制。 学习控制单元可以设置在位置信号检测单元和反馈计算单元之间，并且可以以类似的方式学习位置函数TESrepeat（t）作为近似函数TES repeat（t）。

公开(公告)号：US20120307400A1

公开(公告)日：2012-12-06

申请号：US13348442

申请日：2012-01-11

申请人： Takayuki Kawabe

发明人： Takayuki Kawabe

IPC分类号： G11B5/58

CPC分类号： G11B5/59627 ,  G11B5/012

摘要： According to one embodiment, a disk storage apparatus includes a write module and a controller. The write module is configured to move a write head over a disk, and to perform the shingled write method, recording data in the first track while erasing data from a part of the second, i.e., adjacent track. The controller is configured to acquire a first head positioning error with respect to the first track and a second head positioning error with respect to the second track. If the first head positioning error exceeds an off-track threshold value, indicating that the data may no longer be maintained in the first and second tracks, the controller inhibits the data writing.

摘要翻译： 根据一个实施例，盘存储装置包括写入模块和控制器。 写入模块被配置为将写入磁头移动到磁盘上，并且执行带灰色的写入方法，在从第二个即相邻磁道的一部分擦除数据的同时将数据记录在第一磁道中。 控制器被配置为相对于第一轨道获取第一头定位误差，并且相对于第二轨迹获取第二头定位误差。 如果第一磁头定位误差超过偏离磁道阈值，指示数据可能不再保持在第一和第二磁道中，则控制器禁止数据写入。

公开(公告)号：US08300350B2

公开(公告)日：2012-10-30

申请号：US13170137

申请日：2011-06-27

申请人： Takayuki Kawabe

发明人： Takayuki Kawabe

IPC分类号： G11B5/596 ,  G11B5/03 ,  G11B27/36

CPC分类号： G11B5/09 ,  G11B5/59627 ,  G11B19/045 ,  G11B20/1258 ,  G11B2220/2516

摘要： According to one embodiment, a magnetic disk drive comprises a write count memory, a read offset setting module and a controller. The write count memory stores a write count for each track or for each zone on a disk. The read offset setting module sets, in accordance with a write count for an adjacent track to a target track or for a zone to which the adjacent track belongs, an offset from a predetermined position on the target track in a read position in which a head is to be positioned when the head is positioned on the target track for data read. The write count is stored in the write count memory. The controller positions the head in a position shifted from the predetermined position by the set offset.

摘要翻译： 根据一个实施例，磁盘驱动器包括写入计数存储器，读取偏移设置模块和控制器。 写计数存储器存储每个磁道或磁盘上每个区域的写入计数。 读取偏移设定模块根据与目标轨道相邻的轨迹或相邻轨道所属的区域的写入计数，在读取位置中设定从目标轨道上的预定位置的偏移量，其中头部 当头部位于目标轨道上以进行数据读取时将被定位。 写入计数存储在写入计数存储器中。 控制器将磁头定位在从预定位置偏移设定偏移的位置。

公开(公告)号：US07920348B2

公开(公告)日：2011-04-05

申请号：US12475016

申请日：2009-05-29

申请人： Takayuki Kawabe

发明人： Takayuki Kawabe

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/59688 ,  G11B5/743 ,  G11B5/855

摘要： A patterned media type magnetic storage medium has separated magnetic dots formed a data area having a first magnetic dots and a servo area. The micro position detection portion in the servo area is constructed with first and second dot arrays having a different number of second magnetic dots in the circumference direction and face with the center line that the first magnetic dots of the data area in the magnetic storage medium are disposed, as the axis. The area of the magnetic dot constituting the micro position detection portion of the servo area is small, so the coercive force of the servo area increases. The frequency is changed depending on the number of magnetic dots, and the phase is changed depending on the position of the magnetic dot array in the radius direction with the center line as an axis.

摘要翻译： 图案化介质型磁存储介质具有分离的磁点，形成具有第一磁点和伺服区的数据区。 伺服区域中的微位置检测部分由在圆周方向上具有不同数量的第二磁性点的第一和第二点阵列构成，并且与中心线相对，磁记录介质中的数据区的第一磁点为 设置为轴。 构成伺服区域的微位置检测部分的磁点的面积小，因此伺服区域的矫顽力增大。 频率根据磁点的数量而改变，并且根据磁点阵列在中心线为轴的半径方向上的位置而改变相位。

公开(公告)号：US07889451B2

公开(公告)日：2011-02-15

申请号：US12511829

申请日：2009-07-29

申请人： Takayuki Kawabe

发明人： Takayuki Kawabe

IPC分类号： G11B5/09

CPC分类号： G11B5/59616 ,  B82Y10/00 ,  G11B5/02 ,  G11B5/746 ,  G11B27/3027 ,  G11B2220/2516

摘要： According to an aspect of the embodiment, in a magnetic recording apparatus having a magnetic recording medium of a patterned media system, a voltage generated between both terminals of a magnetic field generating coil in a case that a DC current is supplied to a recording element of a magnetic head is measured by a voltage measuring circuit in order to perform accurate recording at the center of each of magnetic body regions sectioned with non-magnetic body regions. Based on the measured voltage, a change in coil inductance in passage of the magnetic head over a magnetic body region and a non-magnetic body region in a patterned media is detected by a voltage change detecting circuit. A write clock signal which synchronizes with the change in coil inductance is generated by a clock signal generating circuit.

摘要翻译： 根据本实施例的一个方面，在具有图案化介质系统的磁记录介质的磁记录装置中，在将直流电流提供给记录元件的记录元件的情况下，产生在磁场产生线圈的两个端子之间的电压 通过电压测量电路测量磁头，以便在每个被非磁性体区域分割的磁体区域的中心处执行精确的记录。 基于测量的电压，通过电压变化检测电路检测磁头在磁体区域和图案化介质中的非磁性体区域通过的线圈电感的变化。 与时钟信号发生电路产生与线圈电感变化同步的写时钟信号。