公开(公告)号：US07423835B2

公开(公告)日：2008-09-09

申请号：US11590758

申请日：2006-11-01

申请人： Hideo Sado ,  Masahide Yatsu ,  Masafumi Iwashiro ,  Shouji Nakajima ,  Seiji Mizukoshi ,  Shinichiro Kouhara

发明人： Hideo Sado ,  Masahide Yatsu ,  Masafumi Iwashiro ,  Shouji Nakajima ,  Seiji Mizukoshi ,  Shinichiro Kouhara

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/59661

摘要： According to one embodiment, in a disk drive using a disk medium storing spiral servo information, a CPU generates virtual servo information having assumed virtual track centers corresponding to centers of concentric data tracks. The CPU performs control to position a head to the center of the concentric data track by using the virtual servo information.

摘要翻译： 根据一个实施例，在使用存储螺旋伺服信息的磁盘介质的磁盘驱动器中，CPU生成具有与同心数据磁道的中心相对应的具有虚拟磁道中心的虚拟伺服信息。 CPU执行控制以通过使用虚拟伺服信息将磁头定位在同心数据磁道的中心。

公开(公告)号：US20080151412A1

公开(公告)日：2008-06-26

申请号：US11960933

申请日：2007-12-20

申请人： Shouji Nakajima ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Toshitaka Matsunaga ,  Seiji Mizukoshi ,  Shinichirou Kouhara

发明人： Shouji Nakajima ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Toshitaka Matsunaga ,  Seiji Mizukoshi ,  Shinichirou Kouhara

IPC分类号： G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59633

摘要： According to one embodiment, a servo writing apparatus that writes a multi-spiral servo pattern to a disk medium is disclosed. The apparatus has a servo controller that generates a servo clock determining a head seek start timing, a servo pattern generator that generates a sector index pulse determining the interval at which a multi-spiral servo pattern is written to the disk medium, a clock phase difference measuring unit that measures a phase difference between the servo clock and the sector index pulse, and a controller that adjusts the measured phase difference.

摘要翻译： 根据一个实施例，公开了一种向盘介质写入多螺旋伺服模式的伺服写入装置。 该装置具有产生确定头部寻道开始定时的伺服时钟的伺服控制器，产生确定将多螺旋伺服模式写入盘介质的间隔的扇区索引脉冲的伺服模式发生器，时钟相位差 测量单元，其测量伺服时钟和扇区索引脉冲之间的相位差;以及控制器，其调整测量的相位差。

公开(公告)号：US20080068740A1

公开(公告)日：2008-03-20

申请号：US11898565

申请日：2007-09-13

申请人： Shinichirou Kouhara ,  Masahide Yatsu ,  Masafumi Iwashiro ,  Hideo Sado ,  Katsuki Ueda ,  Seiji Mizukoshi ,  Shouji Nakajima

发明人： Shinichirou Kouhara ,  Masahide Yatsu ,  Masafumi Iwashiro ,  Hideo Sado ,  Katsuki Ueda ,  Seiji Mizukoshi ,  Shouji Nakajima

IPC分类号： G11B21/02

CPC分类号： G11B5/59655 ,  G11B5/59638

摘要： According to one embodiment, a disk drive having a disk medium on which servo data is recorded, and a control unit that controls the positioning of a head, moving the head to a target position on the disk medium in accordance with the servo data. The servo data contains servo-burst patterns written in units of servo-track pitches. A part of each servo-burs pattern is invalidated (trimmed).

摘要翻译： 根据一个实施例，具有记录有伺服数据的盘介质的盘驱动器和控制头的定位的控制单元，根据伺服数据将头移动到盘介质上的目标位置。 伺服数据包含以伺服轨道间距为单位写入的伺服突发模式。 每个伺服毛刺图案的一部分无效（修剪）。

公开(公告)号：US5754358A

公开(公告)日：1998-05-19

申请号：US698515

申请日：1996-08-15

申请人： Masahide Yatsu

发明人： Masahide Yatsu

IPC分类号： G11B5/54 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08

CPC分类号： G11B21/083 ,  G11B5/5547 ,  G11B5/5565 ,  G11B5/59627

摘要： The present invention relates to a head positioning control system for controlling to move a head to a target position on a disk as a recording medium on the basis of servo data recorded on the disk in a disk drive. A speed control section calculates a model acceleration for the head on the basis of the distance between the target position and a model position. A model section models movement control for moving the head to the target position, on the basis of the model acceleration. The model position is updated by calculation in the model section. A correcting value for correcting the model acceleration is calculated on the basis of a displacement of the actual position of the head from the calculated model position. An actual machine section performs movement control for moving the head to the target position on the basis of the sum of the model acceleration and the correcting value. The actual position is updated by calculation in the actual machine section.

摘要翻译： 本发明涉及一种头位置控制系统，用于基于记录在磁盘驱动器中的盘上的伺服数据来控制将头移动到作为记录介质的盘上的目标位置。 速度控制部根据目标位置与模型位置之间的距离来计算头部的模型加速度。 基于模型加速度，模型部分模型将头部移动到目标位置的移动控制。 模型位置通过模型部分中的计算更新。 基于来自计算出的模型位置的头部的实际位置的位移来计算用于校正模型加速度的校正值。 实际机器部分执行基于模型加速度和校正值之和将头移动到目标位置的移动控制。 实际位置通过实际机器部分的计算更新。

公开(公告)号：US5680271A

公开(公告)日：1997-10-21

申请号：US528006

申请日：1995-09-14

申请人： Masahide Yatsu

发明人： Masahide Yatsu

IPC分类号： G11B21/08 ,  G05B11/32 ,  G05D3/12 ,  G11B5/55 ,  G11B5/596

CPC分类号： G11B5/5547

摘要： A head positioning system includes a feedforward operation controller which calculates a basic head position control signal to output to a head displacement providing device based upon the target track the head is to be moved to and the present head position at the time when a head positioning operation begins. Subsequently, a feedback corrected control signal for head positioning is calculated by a feedback operation controller using a detected signal indicating actual head position relative to the record disk. Until the results from the feedback operation controller are available, the basic head position control signal is utilized for the head positioning operation. This basic head position control signal is also used for controlling head positioning whenever an output from the feedback operation controller is not being provided. When outputs from the feedback operation controller are provided, they are added with the basic head position control signal to form a combined position control signal to control head movement.

摘要翻译： 头定位系统包括前馈操作控制器，该前馈操作控制器基于头部移动到的目标轨迹和头部定位操作时的当前头部位置来计算基本头部位置控制信号以输出到头部位移提供装置 开始 随后，通过反馈操作控制器使用指示相对于记录盘的实际头部位置的检测信号计算用于头部定位的反馈校正控制信号。 在反馈操作控制器的结果可用之前，基本的头部位置控制信号用于头部定位操作。 这个基本的头部位置控制信号也用于在不提供来自反馈操作控制器的输出时控制头部定位。 当提供来自反馈操作控制器的输出时，它们被添加有基本头部位置控制信号以形成组合位置控制信号以控制头部移动。

公开(公告)号：US08300351B2

公开(公告)日：2012-10-30

申请号：US13167671

申请日：2011-06-23

申请人： Hiroyuki Suzuki ,  Hiroshi Kubota ,  Masahide Yatsu

发明人： Hiroyuki Suzuki ,  Hiroshi Kubota ,  Masahide Yatsu

IPC分类号： G11B5/596 ,  G11B21/02 ,  G11B5/09

CPC分类号： G11B5/59672 ,  G11B5/59627

摘要： According to one embodiment, a magnetic recording apparatus includes a magnetic recording medium for perpendicular magnetic recording system, a magnetic head including a read head to read data from the magnetic recording medium, and an actuator to actuate the magnetic head on the magnetic recording medium. The magnetic recording medium includes a first magnetic pattern recorded in a servo area by applying a magnetic field horizontally to a disk surface, and the first magnetic pattern corresponding to positioning data used for positioning the magnetic head. The magnetic recording medium further includes a second magnetic pattern recorded in the servo area by applying a magnetic field perpendicularly to the disk surface, and the second magnetic pattern corresponding to position correction data used for correcting the positioning data. The position correction data is derived from modulated original position correction data. The original position correction data is created for correcting the positioning data.

摘要翻译： 根据一个实施例，磁记录装置包括用于垂直磁记录系统的磁记录介质，包括用于从磁记录介质读取数据的读头的磁头和用于致动磁记录介质上的磁头的致动器。 磁记录介质包括通过向盘表面水平施加磁场而记录在伺服区域中的第一磁图案，以及对应于用于定位磁头的定位数据的第一磁图案。 磁记录介质还包括通过垂直于盘表面施加磁场而记录在伺服区中的第二磁图，和与用于校正定位数据的位置校正数据相对应的第二磁图。 位置校正数据从调制的原始位置校正数据导出。 创建用于校正定位数据的原始位置校正数据。

公开(公告)号：US07457074B2

公开(公告)日：2008-11-25

申请号：US11713626

申请日：2007-03-05

申请人： Hideo Sado ,  Masahide Yatsu ,  Yuichi Notake ,  Seiji Mizukoshi ,  Takayuki Matsuzaki ,  Takuji Shimada

发明人： Hideo Sado ,  Masahide Yatsu ,  Yuichi Notake ,  Seiji Mizukoshi ,  Takayuki Matsuzaki ,  Takuji Shimada

IPC分类号： G11B21/12 ,  G11B5/09

CPC分类号： G11B5/59688 ,  G11B5/59661

摘要： According to one embodiment, a servo information writing method for use in a disk drive, for recording the servo information, forming a continuous servo track such as a spiral track. In this servo information writing method, the head is stopped when a write error is detected while the servo information is being written, and the head is then moved again at a constant speed and starts writing the servo information again, at the position where the write error has occurred.

摘要翻译： 根据一个实施例，一种用于磁盘驱动器的伺服信息写入方法，用于记录伺服信息，形成诸如螺旋磁道的连续伺服磁道。 在该伺服信息写入方式中，当写入伺服信息时检测到写入错误时头部停止，然后以恒定速度再次移动头部，并且在写入的位置开始再次写入伺服信息 发生错误

公开(公告)号：US20080151409A1

公开(公告)日：2008-06-26

申请号：US11942389

申请日：2007-11-19

申请人： Seiji Mizukoshi ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Toshitaka Matsunaga ,  Shinichirou Kouhara ,  Shouji Nakajima

发明人： Seiji Mizukoshi ,  Masahide Yatsu ,  Hideo Sado ,  Katsuki Ueda ,  Toshitaka Matsunaga ,  Shinichirou Kouhara ,  Shouji Nakajima

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  G11B5/59661

摘要： According to one embodiment, there is to provide a servo write method of writing a multi-spiral servo pattern to a disk medium, the method including a process of writing a spiral index pattern to the disk medium, the spiral index pattern being a spiral pattern including the same region as that of a servo burst signal included in the spiral servo pattern and a region that allows the spiral index pattern to be distinguished from the spiral servo pattern, the spiral index pattern being used as a reference for a write start.

摘要翻译： 根据一个实施例，提供一种向盘介质写入多螺旋伺服模式的伺服写入方法，所述方法包括将螺旋索引图案写入盘介质的过程，螺旋索引图案是螺旋图案 包括与包括在螺旋伺服模式中的伺服脉冲串信号相同的区域，以及允许将螺旋索引图案与螺旋伺服模式区分开的区域，螺旋索引模式用作写入开始的参考。

公开(公告)号：US07312946B2

公开(公告)日：2007-12-25

申请号：US11412144

申请日：2006-04-27

申请人： Makoto Asakura ,  Masahide Yatsu

发明人： Makoto Asakura ,  Masahide Yatsu

IPC分类号： G11B5/596

CPC分类号： G11B5/59688

摘要： According to one embodiment, in a disk drive which performs positioning control of a head on the basis of a servo burst pattern recorded on a disk medium, a servo processor generates a tangent-equivalent value by using a burst value obtained from the servo burst pattern. Furthermore, the servo processor executes an arctangent transform process by an inverse function approximate expression structured on the basis of a relationship between an off-track position and the tangent-equivalent value to detect the off-track position.

摘要翻译： 根据一个实施例，在基于记录在盘介质上的伺服突发模式执行头的定位控制的盘驱动器中，伺服处理器通过使用从伺服突发模式获得的突发值产生切线等效值 。 此外，伺服处理器通过基于离轨位置和切线等效值之间的关系构成的逆函数近似表达式执行反正切变换处理，以检测偏离轨迹位置。

公开(公告)号：US07239472B2

公开(公告)日：2007-07-03

申请号：US11376594

申请日：2006-03-16

申请人： Hideo Sado ,  Masahide Yatsu ,  Tomoko Taguchi

发明人： Hideo Sado ,  Masahide Yatsu ,  Tomoko Taguchi

IPC分类号： G11B5/00 ,  G11B20/20

CPC分类号： G11B20/10 ,  G11B5/59688 ,  G11B20/1258 ,  G11B2220/2516

摘要： According to one embodiment, there is to provide a data write method which is applied to a disk drive, for recording data on a disk medium by a head mounted on a rotary type actuator. The method carries out a track pitch conversion processing so that a track pitch of data track is set larger than a track pitch in an intermediate circumferential area based on an azimuth angle of the head in the case where the position of the data track is included in an inner circumferential area or outer circumferential area on the disk medium.

摘要翻译： 根据一个实施例，提供一种应用于磁盘驱动器的数据写入方法，用于通过安装在旋转型致动器上的磁头在磁盘介质上记录数据。 该方法执行轨道间距转换处理，使得在包括数据轨道的位置的情况下，基于头部的方位角，将数据轨道的轨道间距设置为大于中间圆周区域中的轨道间距 盘介质上的内圆周区域或外圆周区域。