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41 条记录 (耗时 0.045 秒)

    Head position control for a disk drive which performs recording about the rotational center even if the recorded servo information is eccentric
    31.
    发明授权
    Head position control for a disk drive which performs recording about the rotational center even if the recorded servo information is eccentric 失效
    即使记录的伺服信息是偏心的，也执行关于旋转中心的记录的磁盘驱动器的磁头位置控制

    公开(公告)号：US6128153A

    公开(公告)日：2000-10-03

    申请号：US805161

    申请日：1997-02-24

    申请人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Tomoyoshi Yamada ,  Takahisa Ueno ,  Nobuyuki Suzuki ,  Keiji Aruga ,  Shuichi Hashimoto

    发明人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Tomoyoshi Yamada ,  Takahisa Ueno ,  Nobuyuki Suzuki ,  Keiji Aruga ,  Shuichi Hashimoto

    IPC分类号： G11B21/10 ,  G11B5/596

    CPC分类号： G11B5/59627

    摘要： Head position control is implemented in a disk drive for the case in which a disk is assembled into the disk drive after a precise track is recorded onto it using an external apparatus, which is capable of high-speed access even if there is eccentricity between a track defined by servo information and the center of rotation of the track. Two phase servo bursts consisting of servo information are recorded onto each of the servo information regions of a disk surface, in mutual alternation, the strength ratio between signals detected from these two phase servo bursts being used to determine to which side the head is displaced. By performing control so that this strength ratio is a prescribed value at each angular position, control is achieved so that the head moves along a circular path of rotation, even if there is eccentricity in the servo circular path defined by the recorded servo information with respect to the center of rotation.

    摘要翻译： 在磁盘驱动器中实现磁头位置控制，其中在使用外部设备将精确磁道记录在其上之后将磁盘组装到磁盘驱动器中的情况下，其能够高速访问，即使在 由伺服信息定义的轨道和轨道的旋转中心。 由伺服信息组成的两相伺服脉冲串相互交替地记录在盘表面的每个伺服信息区域上，从这两个相位伺服脉冲串检测的信号之间的强度比用于确定磁头移位到哪一侧。 通过进行各个角度位置的强度比为规定值的控制，即使在由所记录的伺服信息确定的伺服圆形路径中存在偏心，也能够沿着圆形的旋转路径进行控制 到旋转中心。

    Apparatus and method of reproducing synchronization signal in disc storage system
    33.
    发明授权
    Apparatus and method of reproducing synchronization signal in disc storage system 失效
    在盘存储系统中再现同步信号的装置和方法

    公开(公告)号：US5724204A

    公开(公告)日：1998-03-03

    申请号：US237404

    申请日：1994-05-02

    申请人： Tohru Shinohara ,  Shuichi Hashimoto

    发明人： Tohru Shinohara ,  Shuichi Hashimoto

    IPC分类号： G11B20/10 ,  G11B5/55 ,  G11B5/596 ,  G11B19/04 ,  G11B20/00 ,  G11B20/14 ,  G11B21/08

    CPC分类号： G11B21/083 ,  G11B19/04 ,  G11B5/5526 ,  G11B5/5547 ,  G11B5/59616

    摘要： An apparatus and a method of reproducing a synchronization signal in a disc storage system. The apparatus includes disc mechanism having a plurality of information storage discs in one of which a predetermined servo pattern is recorded, and a corresponding plurality of reproducing heads, one of the heads reading the servo pattern from the corresponding disc to thereby output a servo signal, a synchronization signal demodulating unit, responsive to the servo signal from the disc mechanism, for demodulating a synchronization signal in synchronization with a rotation of the discs, a synchronization clock generating unit for generating a clock signal with a predetermined frequency in synchronization with the synchronization signal, and a gate unit. For a predetermined period, the gate unit prohibits a supply of the synchronization signal from the synchronization signal demodulating unit to the synchronization clock generating unit. As a result, it is possible to prevent an erroneous detection of a synchronization signal due to a spike noise, an undesirable signal by a defect of a medium, or the like, and thus realize a precise reproducing of the synchronization signal.

    摘要翻译： 一种在盘存储系统中再现同步信号的装置和方法。 该装置包括具有多个信息存储盘的盘机构，其中一个记录有预定的伺服模式，以及相应的多个再现头，其中一个读头从对应的盘读取伺服模式，从而输出伺服信号， 同步信号解调单元，响应于来自盘机构的伺服信号，用于与盘的旋转同步地解调同步信号;同步时钟产生单元，用于与同步信号同步地产生具有预定频率的时钟信号 ，以及门单元。 在预定时间段内，门单元禁止从同步信号解调单元向同步时钟发生单元提供同步信号。 结果，可以防止由于尖峰噪声引起的同步信号的错误检测，由于介质的缺陷导致的不期望的信号等，从而实现了同步信号的精确再现。

    Disk drive and method for retrying a read operation upon detecting a read error
    34.
    发明授权
    Disk drive and method for retrying a read operation upon detecting a read error 失效
    在检测到读取错误时重试读取操作的磁盘驱动器和方法

    公开(公告)号：US5682272A

    公开(公告)日：1997-10-28

    申请号：US422524

    申请日：1995-04-14

    申请人： Yuichi Taroda ,  Shuichi Hashimoto

    发明人： Yuichi Taroda ,  Shuichi Hashimoto

    IPC分类号： G11B5/09 ,  G11B19/04 ,  G11B20/18 ,  G11B27/36

    CPC分类号： G11B27/36 ,  G11B19/04 ,  G11B20/18 ,  G11B5/09 ,  G11B2020/10916 ,  G11B2020/183

    摘要： In a disk drive and a method for retrying to check data in the disk drive, a magnetic disk subsystem comprises a magnetic disk control unit and a drive module. The magnetic disk control unit is provided with a unit for controlling data check retry sequence which has a dummy write control unit. The drive module is provided with heads and a positioning unit. When the data read from the medium contain error, the above unit controls the data check retry sequence in order to read again the data using the same head. The dummy write control unit seeks a dummy write cylinder during the data check retry sequence, effects the dummy writing, seeks the original cylinder again, and reads the data again.

    摘要翻译： 在磁盘驱动器和用于重试以检查磁盘驱动器中的数据的方法中，磁盘子系统包括磁盘控制单元和驱动模块。 磁盘控制单元设置有用于控制具有虚拟写入控制单元的数据检查重试序列的单元。 驱动模块设置有头和定位单元。 当从介质读取的数据包含错误时，上述单元控制数据检查重试序列，以便再次使用相同的头读取数据。 虚拟写入控制单元在数据检查重试序列期间寻找虚拟写入柱，影响虚拟写入，再次寻找原始柱面，并再次读取数据。

    Magnetic disk unit having a plurality of magnetic heads
    36.
    发明授权
    Magnetic disk unit having a plurality of magnetic heads 失效
    具有多个磁头的磁盘单元

    公开(公告)号：US5432659A

    公开(公告)日：1995-07-11

    申请号：US23806

    申请日：1993-02-25

    申请人： Tatsuhiko Kosugi ,  Shuichi Hashimoto

    发明人： Tatsuhiko Kosugi ,  Shuichi Hashimoto

    IPC分类号： G11B21/08 ,  G11B5/55 ,  G11B19/04 ,  G11B21/10 ,  G11B5/596 ,  G11B15/14

    CPC分类号： G11B19/04 ,  G11B5/5534 ,  G11B5/5565

    摘要： In a magnetic disk unit, a magnetic head to be activated is switched from a first magnetic head to a second magnetic head in accordance with an instruction supplied from a host system in a state where a plurality of magnetic heads are positioned at a cylinder on magnetic disks. The magnetic disk unit includes a digital servo controller for monitoring at predetermined intervals whether or not the instruction for the changing of the magnetic head is supplied from the host system, a first output circuit for outputting a first signal for a predetermined time from a time at which the digital servo controller recognizes that the instruction for the changing of the magnetic head is supplied from the host system, and a second output circuit for outputting a second signal at least from a time at which the instruction for the changing of the magnetic head is input to the magnetic disk unit to a time at which the digital servo controller recognizes that the instruction is supplied from the host system. The first signal and the second signal indicate that the magnetic disk unit is busy adjusting the plurality of magnetic heads so that an off-track error of the second magnetic head is cancelled.

    摘要翻译： 在磁盘单元中，在多个磁头位于磁盘上的磁体的状态下，根据从主机系统提供的指令，将被激活的磁头从第一磁头切换到第二磁头 磁盘。 磁盘单元包括数字伺服控制器，用于以预定间隔监视是否从主机系统提供用于改变磁头的指令;第一输出电路，用于从第一输出电路输出预定时间 数字伺服控制器识别出从主机系统提供改变磁头的指令，以及至少从磁头改变指令的时刻输出第二信号的第二输出电路是 输入到磁盘单元到数字伺服控制器识别出从主机系统提供指令的时间。 第一信号和第二信号表示磁盘单元忙于调整多个磁头，从而消除第二磁头的偏离磁道误差。

    Track access control system preventing unintentional delay in movement of head in non-adjusted disc device
    37.
    发明授权
    Track access control system preventing unintentional delay in movement of head in non-adjusted disc device 失效
    跟踪访问控制系统防止头部在非调节光盘设备中的移动的意外延迟

    公开(公告)号：US5231550A

    公开(公告)日：1993-07-27

    申请号：US667164

    申请日：1991-03-11

    申请人： Shuichi Hashimoto

    发明人： Shuichi Hashimoto

    IPC分类号： G11B5/55 ,  G11B19/20

    CPC分类号： G11B19/20 ,  G11B5/5547

    摘要： A track access control system which is used in a rotating disc device, for positioning a servo head above a desired track by speed control and then position control. A timer starts when the head reaches a predetermined position which is out of a predetermined vicinity of the desired track, and when in the vicinity, the control is switched from the speed control to the position control. After a predetermined time has elapsed after the head reaches the predetermined position, the target speed is increased to push the head. Alternatively, after the predetermined time has elapsed after the head reaches the predetermined position, the control may be immediately switched from the speed control to the position control. In addition, in a return-to-zero operation, intervals between times the servo head passes over different tracks are monitored to detect a real speed of the head, and the target speed during the speed control is controlled according to the detected real speed.

    摘要翻译： 一种轨道存取控制系统，其用于旋转盘装置中，用于通过速度控制然后进行位置控制将伺服头定位在期望轨道上方。 当头部到达预期的轨迹预定附近的预定位置时，定时器开始，并且在附近，控制从速度控制切换到位置控制。 在头部到达预定位置经过预定时间之后，目标速度增加以推动头部。 或者，在头到达预定位置经过预定时间之后，可以立即将控制从速度控制切换到位置控制。 此外，在归零操作中，监视伺服头经过不同轨道的间隔，以检测头的实际速度，并且根据检测到的实际速度来控制速度控制期间的目标速度。

    Servo circuit control method and system
    38.
    发明授权
    Servo circuit control method and system 失效
    伺服电路控制方法与系统

    公开(公告)号：US5194798A

    公开(公告)日：1993-03-16

    申请号：US460668

    申请日：1990-01-03

    申请人： Shuichi Hashimoto ,  Tohru Shinohara

    发明人： Shuichi Hashimoto ,  Tohru Shinohara

    IPC分类号： G11B5/55 ,  G11B7/085 ,  G11B21/08

    CPC分类号： G11B7/08535 ,  G11B21/085 ,  G11B5/5547

    摘要： A control system for a servo circuit has a speed control unit for controlling the speed of a servo object, a position control unit for controlling the position of the servo object, a switching unit for switching between the speed control unit and the position control unit, a main control unit, and optionally a speed zero detection circuit which compares the real speed and a slice level and detects if the real speed is less than a fixed value. The control system includes a method for producing a target speed using an amount of movement X in an amount of movement d as a remaining amount of movement, and producing a target speed of equal speed for a remaining amount of movement Y. Another method includes controlling the switching of position control of the servo circuit, determining if the conditions for switching to position control are met during speed control, monitoring conditions for switching for a fixed time X after detection of the switching conditions, switching position control when the switching conditions are met for the fixed time X, and returning to determine the switching conditions in accordance with the collapse of switching conditions within the fixed time. An additional method includes outputting a target speed using an amount of movement X as a remaining amount of movement, outputting a target speed of an equal speed of a remaining amount of movement Y, and switching the value of the slice level during the start of movement and after the movement.