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    Eccentricity correction data recording method and recording medium having eccentricity correction data
    2.
    发明授权
    Eccentricity correction data recording method and recording medium having eccentricity correction data 失效
    偏心校正数据记录方法和具有偏心校正数据的记录介质

    公开(公告)号：US07365927B2

    公开(公告)日：2008-04-29

    申请号：US10784666

    申请日：2004-02-23

    申请人： Kohei Takamatsu ,  Yoshiyuki Kagami ,  Shuichi Hashimoto

    发明人： Kohei Takamatsu ,  Yoshiyuki Kagami ,  Shuichi Hashimoto

    IPC分类号： G11B5/09

    CPC分类号： G11B5/10 ,  G11B5/00813 ,  G11B5/02 ,  G11B5/024 ,  G11B5/4893 ,  G11B5/59627 ,  G11B2005/001

    摘要： An eccentricity correction data recording method, a disk-shaped recording medium, a head position control method and an information recording and reproducing apparatus are disclosed for effective eccentricity correction on cylinders of a disk-shaped recording medium. The eccentricity correction data recording method is for position control over a recording and reproducing head on a disk-shaped recording medium having at least one user data recording area to record user data, the method including the step of recording the eccentricity correction data in a user data recording area.

    摘要翻译： 公开了一种偏心校正数据记录方法，盘形记录介质，磁头位置控制方法和信息记录和再现装置，用于在盘形记录介质的气缸上进行有效的偏心校正。 偏心校正数据记录方法是用于在具有至少一个用户数据记录区域的盘形记录介质上对记录和再现头进行位置控制以记录用户数据，该方法包括在用户中记录偏心校正数据的步骤 数据记录区。

    Head control method and recording apparatus
    3.
    发明授权
    Head control method and recording apparatus 有权
    头控制方法和记录装置

    公开(公告)号：US07002769B2

    公开(公告)日：2006-02-21

    申请号：US10920746

    申请日：2004-08-18

    申请人： Yoshiyuki Kagami ,  Isamu Tomita ,  Shuichi Hashimoto

    发明人： Yoshiyuki Kagami ,  Isamu Tomita ,  Shuichi Hashimoto

    IPC分类号： G11B5/596 ,  G11B21/02

    CPC分类号： G11B5/5547 ,  G11B5/59633 ,  G11B21/083

    摘要： There is provided a head control method controlling move of a head on a discoidal recording medium including the steps of: partitioning the discoidal recording medium which has position information recorded thereon at radially equal spacing into a plurality of zones; and demodulating the position information using a coefficient set for each of the zones.

    摘要翻译： 提供了一种控制盘在盘形记录介质上的头的移动的头控制方法，包括以下步骤：将其上记录有位置信息的盘状记录介质以径向相等的间隔划分成多个区; 以及使用针对每个区域设置的系数来解调位置信息。

    Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences
    4.
    发明授权
    Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences 失效
    谐振频率测量方法通过对偏离轨迹发生次数进行计数来确定谐振频率

    公开(公告)号：US06774615B2

    公开(公告)日：2004-08-10

    申请号：US10056865

    申请日：2002-01-25

    申请人： Susumu Yoshida ,  Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

    发明人： Susumu Yoshida ,  Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

    IPC分类号： G06M110

    CPC分类号： G11B21/10

    摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method comprises the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.

    摘要翻译： 谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。 谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且计数在应用每个正弦波振荡时再现的信息的数量不同于指示 以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

    Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences
    5.
    发明授权
    Resonance-frequency measuring method determining a resonance frequency by counting the number of off-track occurrences 失效
    谐振频率测量方法通过对偏离轨迹发生次数进行计数来确定谐振频率

    公开(公告)号：US07164261B2

    公开(公告)日：2007-01-16

    申请号：US10824896

    申请日：2004-04-15

    申请人： Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

    发明人： Shuichi Hashimoto ,  Ryuki Kubohara ,  Tatsuhiko Kosugi ,  Takeyori Hara ,  Yoshiyuki Kagami

    IPC分类号： G01R23/167 ,  G01R23/00

    CPC分类号： G11B21/10

    摘要： A resonance-frequency measuring method is used for measuring a resonance frequency of an information recording/reproducing device reproducing information recorded on a medium by driving a mechanism unit. The resonance-frequency measuring method includes the measuring step of applying sine-wave oscillations at different frequencies one by one to the mechanism unit, and counting the number of times information reproduced upon application of each of the sine-wave oscillations differs from information indicating an aimed location, and the resonance-frequency determining step of determining the resonance frequency according to the number of times counted in the measuring step.

    摘要翻译： 谐振频率测量方法用于通过驱动机构单元来测量记录在介质上的信息记录/再现装置再现信息的共振频率。 谐振频率测量方法包括测量步骤，将不同频率的正弦波振荡逐个地施加到机构单元，并且对施加每个正弦波振荡时再现的信息的计数不同于指示 以及谐振频率确定步骤，用于根据在测量步骤中计数的次数来确定谐振频率。

    Servo positioning circuit
    7.
    发明授权
    Servo positioning circuit 失效
    伺服定位电路

    公开(公告)号：US5173647A

    公开(公告)日：1992-12-22

    申请号：US460519

    申请日：1990-01-03

    申请人： Shuichi Hashimoto

    发明人： Shuichi Hashimoto

    IPC分类号： G05D3/12 ,  G11B5/55 ,  G11B21/08 ,  H02P25/06

    CPC分类号： G11B5/5547 ,  G11B21/085

    摘要： A servo positioning circuit having a speed detection circuit for detecting a real speed from a position signal from a servo object; a speed error detection circuit for generating an error between a target speed and the real speed; a position error detection circuit for generating a position error signal from the position signal; a switching unit for switching connection of the servo object to the speed error detection circuit or the position error detection circuit; and a main processing unit for generating a target speed in accordance with the position signal and controlling the switching of the switching unit. When the servo object nears a target position, speed control by the speed error detection circuit switches to position control by the position error detection circuit. Further, a speed detection gain adjustment unit is included in the speed detection circuit, and the main processing unit changes the speed detection gain of an speed detection gain adjustment unit in accordance with the amount of difference.

    Automatic adjustment method and system for servo motor circuit of a magnetic disk apparatus
    9.
    发明授权
    Automatic adjustment method and system for servo motor circuit of a magnetic disk apparatus 失效
    磁悬浮装置伺服电机电路的自动调整方法及系统

    公开(公告)号：US5063454A

    公开(公告)日：1991-11-05

    申请号：US460657

    申请日：1990-01-03

    申请人： Shuichi Hashimoto

    发明人： Shuichi Hashimoto

    IPC分类号： G11B5/55 ,  G11B21/08

    CPC分类号： G11B21/085 ,  G11B5/5547

    摘要： An automatic adjustment system for a servo circuit of a magnetic disk apparatus having a magnetic head, a position signal preparing circuit, a speed control unit, and a position control unit. An automatic adjustment method includes monitoring a core width adjustment of the position signal while engaged in a uniform speed seek operation and adjusting a detection sensitivity of the position signal preparing circuit so that an angle of slope of the position signal becomes a predetermined value, measuring a forward/reverse seek operation time of the time between a forward seek operation and a reverse seek operation and adjusting a speed detecting offset of the speed control unit so that a difference between the forward seek operation time and the reverse seek operation time becomes minimal. A position control offset adjustment step is provided for measuring an integration value of the position signal during position control in a seek operation and adjusting the offset of the position control unit so that the integration value becomes minimal. The steps of counting a seek operation time and positioning adjustment of the seek operation time, adjusting a differentiation gain of the speed control unit so that the seek operation time becomes minimal, integrating the position signal, and adjusting a control current detection gain of the speed control unit so that the integration value becomes minimal, are also performed.

    Head positioning control apparatus of disk drive and method of controlling the same apparatus
    10.
    发明授权
    Head positioning control apparatus of disk drive and method of controlling the same apparatus 失效
    磁盘驱动器的头部定位控制装置和控制相同装置的方法

    公开(公告)号：US5844744A

    公开(公告)日：1998-12-01

    申请号：US820637

    申请日：1992-01-24

    申请人： Nobuyuki Suzuki ,  Shuichi Hashimoto ,  Toshio Negoro

    发明人： Nobuyuki Suzuki ,  Shuichi Hashimoto ,  Toshio Negoro

    IPC分类号： G11B5/55 ,  G11B21/08 ,  G11B21/18

    CPC分类号： G11B5/553 ,  G11B21/083 ,  G11B21/085 ,  G11B21/18

    摘要： A head positioning apparatus and method for a disk drive system. During each computing time of a plurality of sequential computing times: (a) a position of a servo head on a disk is computed, (b) an actual position of the servo head in the present computing time is computed, based on the computed position of the servo head and an estimated position of the servo head computed in the preceding computing time, (c) a moving distance of the servo head is computed, based on the actual positions of the servo head computed in the present computing time and in the preceding computing time, (d) an estimated position of the servo head in the present computing time, indicating an estimated position reached by the servo head at the succeeding computing time, is computed from the actual position of the servo head computed in the present computing time to the moving distance of the servo head, (e) a moving velocity of the servo head is computed based on the actual position of the servo head computed in the present computing time and the actual position of the servo head computed in the preceding computing time, (f) a remaining number of tracks up to a target track is computed, based on the actual position of the servo head computed in the present computing time, and (g) an object velocity of the servo head is obtained, based on the remaining number of tracks.

    摘要翻译： PCT No.PCT / JP91 / 00870 Sec。 371日期：1993年10月18日 102（e）日期1993年10月18日PCT提交1990年6月27日PCT公布。 出版物WO92 / 11636 日本1992年7月9日磁头驱动系统的头部定位装置及方法。 在多个顺序计算时间的每个计算时间期间：（a）计算一个伺服磁头在磁盘上的位置，（b）基于计算出的位置计算当前计算时间内的伺服磁头的实际位置 伺服头的计算位置和前一计算时间中计算的伺服头的估计位置，（c）基于当前计算时间内计算出的伺服头的实际位置，计算伺服头的移动距离， （d）当前计算时间内的伺服头的估计位置，表示在随后的计算时刻由伺服头达到的估计位置，根据本计算中计算的伺服头的实际位置计算 时间到伺服头的移动距离，（e）伺服头的移动速度是根据在当前计算时间内计算的伺服头的实际位置和伺服头的实际位置来计算的 （f）基于在当前计算时间中计算的伺服头的实际位置，计算直到目标轨道的剩余轨道数，以及（g）目标轨迹的目标速度， 基于剩余的轨道数获得伺服头。