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158 条记录 (耗时 0.017 秒)

    Magnetic-recording method and apparatus; magnetic record medium produced by such method and method of using such record medium
    51.
    发明公开
    Magnetic-recording method and apparatus; magnetic record medium produced by such method and method of using such record medium 失效
    磁记录方法和装置; 通过这种方法生产的磁记录介质和使用这种记录介质的方法

    公开(公告)号：EP0030301A3

    公开(公告)日：1981-11-25

    申请号：EP80107235

    申请日：1980-11-20

    申请人： International Business Machines Corporation

    发明人： Cheatham, Samuel David ,  Haynes, Munro King

    IPC分类号： G11B05/00 ,  G11B05/02 ,  G11B05/012

    CPC分类号： G11B5/02 ,  G11B5/488 ,  G11B5/596 ,  G11B27/3027 ,  G11B2220/20 ,  G11B2220/90

    摘要： ©7 A reference signal to be stabilized in a magnetic record member is recorded via a head Hl having a given maximal gap length and pole pieces of high saturation induction. After the reference signal is recorded, the magnetic record member is surface erased for stabilizing the just recorded reference signal. The surface erasing is performed by AC erasing via a transducer H2 having a gap length less than said maximal gap length. The pole pieces of the erasing head need not have the high saturation induction of the first mentioned head. After such stabilization, information signals can be easily recorded and recovered from the magnetic record member by using transducers H3 with gap lengths less than the given maximal gap length of head Hl and using normal ferrite heads having a lower saturation induction than the head H1. The reference signal can serve as a position indicating signal in a magnetic record member, such as a storage disk ortape. The reference signal can also be used for other purposes, such as phase control for recording and in a controlled access or security system.

    摘要翻译： 通过具有给定的最大间隙长度的磁头H1和高饱和感应的磁极片来记录要在磁记录部件中稳定的参考信号。 在记录参考信号之后，磁记录元件被表面擦除，以稳定刚刚记录的参考信号。 表面擦除通过经由具有小于所述最大间隙长度的间隙长度的换能器H2的AC擦除来执行。 擦除头的极片不需要具有第一个头部的高饱和感应。 在这样的稳定​​化之后，通过使用间隙长度小于头H1的给定最大间隙长度的换能器H3，并使用具有比头H1低的饱和感应的普通铁氧体磁头，可以容易地从磁记录部件记录和恢复信息信号。 参考信号可以用作诸如存储盘或磁带的磁记录部件中的位置指示信号。 参考信号也可以用于其他目的，例如用于记录的相位控制和受控访问或安全系统。

    IMPROVED APPARATUS, SYSTEMS AND PROCESSES FOR REDUCING A HARD DISK DRIVE'S ACCESS TIME AND CONCOMITANT POWER OPTIMIZATION
    52.
    发明公开
    IMPROVED APPARATUS, SYSTEMS AND PROCESSES FOR REDUCING A HARD DISK DRIVE'S ACCESS TIME AND CONCOMITANT POWER OPTIMIZATION 审中-公开
    改进的设备，系统和方法。一，硬盘还原访问时间和同步电源优化

    公开(公告)号：EP3072131A1

    公开(公告)日：2016-09-28

    申请号：EP14864629.2

    申请日：2014-11-13

    申请人： L2 Drive LLC

    发明人： KADDECHE, Karim

    IPC分类号： G11B19/20

    CPC分类号： G11B5/596 ,  G11B5/4806 ,  G11B5/4826 ,  G11B5/4886 ,  G11B5/5521 ,  G11B5/5569 ,  G11B5/5578

    摘要： Rotational latency is reduced in a standard conventional form factor HDD system by replacing, for example - the prior art rotary arm actuator of a conventional HDD, with one or more belts and pulleys and one or more read/write heads mounted on, or otherwise associated with the belts. Multiple scaled iterations facilitate energy savings and power optimized systems, without compromise to data access performance.

    摘要翻译： 旋转等待时间是在一个标准的常规的形状因数HDD系统通过替换，例如，现有技术的旋转臂上的常规HDD的致动器，与一个或多个皮带和滑轮和一个或多个读/写头安装在，或以其它方式相关联的降低 与安全带。 缩放多次迭代促进节约能源和电力优化的系统，无需妥协数据访问性能。

    SERVO CONTROL IN TAPE DRIVES
    57.
    发明公开
    SERVO CONTROL IN TAPE DRIVES 审中-公开
    SERVOREGELUNG在BANDLAUFWERKEN

    公开(公告)号：EP2301029A2

    公开(公告)日：2011-03-30

    申请号：EP09766277.9

    申请日：2009-06-17

    申请人： International Business Machines Corporation

    发明人： CHERUBINI, Giovanni ,  JELITTO, Jens ,  LANTZ, Mark A.

    IPC分类号： G11B5/58 ,  G11B15/43

    CPC分类号： G11B5/58 ,  G11B5/596 ,  G11B15/093 ,  G11B15/43

    摘要： Servo control methods and apparatus are provided for a tape drive (1) where a read/write head (2) reads and writes data on magnetic tape (3) with at least one servo track for providing transversal position information. At least two servo readers (S) are associated with the read/write head (2), each arranged for reading a said servo track during read/write operations. The servo readers (S) are operative concurrently to generate respective servo read signals (r). A position estimator (8) processes each servo read signal (r) to generate a series of position values, corresponding to respective time instants, indicative of transversal position of the associated servo reader (S). A servo controller (10) calculates from the position values and time instants a skew value (θ), indicative of tape skew relative to the read/write head (2), and a tension variation value (AT) indicative of variation of tape tension from a reference value. The servo controller (10) is adapted to account for cross-coupling between tape skew and tension variation in the joint calculation of the skew and tension variation values. Where three servo readers (S) are operative concurrently, the servo controller (10) can be adapted to account for time dependency of tape skew and tension variation and to calculate respective time derivatives (θ\ AT') for the skew and tension variation values (θ, AT). The calculated values can then be used to make compensatory adjustments to tape tension and tape skew relative to the read/write head (2).

    Head positioning control method, head positioning control device and disk apparatus
    58.
    发明公开
    Head positioning control method, head positioning control device and disk apparatus 审中-公开
    用于头部位置和盘装置头位置控制装置的控制方法

    公开(公告)号：EP1840883A3

    公开(公告)日：2008-04-02

    申请号：EP06253743.6

    申请日：2006-07-18

    申请人： Fujitsu Ltd.

    发明人： Takaishi, Kazuhiko, c/o Fujitsu Limited

    IPC分类号： G11B5/55 ,  G11B5/58

    CPC分类号： G11B5/5582 ,  G11B5/596

    摘要： A positioning control device (14) executes disturbance observer control having a disturbance suppression function, wherein changes of control characteristics are prevented even if the disturbance frequency (ω) is suppressed. When a control value of an actuator (1) is computed using estimated gains of the actuator and estimated gains of disturbance according to an estimated position error (e[k]) 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.

    Position control method, position control device, and storage device having disturbance suppression function
    59.
    发明公开
    Position control method, position control device, and storage device having disturbance suppression function 审中-公开
    过程用于位置控制装置，位置控制和存储装置具有噪声抑制功能

    公开(公告)号：EP1901287A1

    公开(公告)日：2008-03-19

    申请号：EP07106829.0

    申请日：2007-04-24

    申请人： Fujitsu Ltd.

    发明人： Takaishi, Kazuhiko

    IPC分类号： G11B5/55 ,  G11B5/596

    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 (32) for storing a target gain according to a disturbance frequency (Fdist), and a gain calibration section (34) for calibrating open loop gain. The gain is calibrated using a target gain in the table (32) 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： 在具有扰动抑制功能的位置控制装置，环路增益进行校准，而不停止扰动抑制控制。 所述位置控制装置具有，扰动抑制控制，用于存储一个目标增益雅丁到的扰动频率（FDIST）改变环路特性，一个表（32）的反馈控制器，以及用于校准开放的增益校正部分（34） 环路增益。 增益是使用在表（32）雅丁到反馈控制器的环路特性的变化的目标增益校准。 开环增益可以在不中断扰动抑制控制被校准，这样的开环增益可以精确地设置，而不受扰动校准，精确的位置控制是可能的。