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    • 13. 发明授权
    • Data storage unit and method for starting data storage unit
    • 用于启动数据存储单元的数据存储单元和方法
    • US06721844B1
    • 2004-04-13
    • US09114584
    • 1998-07-13
    • Kazushige OkutsuTetsuo UedaYukio FukushimaToshio Kakihara
    • Kazushige OkutsuTetsuo UedaYukio FukushimaToshio Kakihara
    • G06F1200
    • G11B19/20G11B19/2054
    • To provide a method of starting a data storage unit which allows a computer system to be used as early as possible. The present invention relates to a method for starting up a computer system having a data storage unit equipped with an actuator arm which supports a flexible cable. The method allows a command from the host computer to be processed before generation of corrected tension data for the flexible cable. The method includes the steps of turning on power; executing a start operation, excluding generation of corrected tension data of the flexible cable; causing an access command from a host computer to be in an executable state, following the step of executing a start operation; and executing generation of corrected tension data of the flexible cable, following the step of causing an access command from a host computer to be in an executable state.
    • 提供启动能够尽可能早地使用计算机系统的数据存储单元的方法。 本发明涉及一种用于启动具有数据存储单元的计算机系统的方法,所述数据存储单元配备有支撑柔性电缆的致动器臂。 该方法允许在生成用于柔性电缆的校正张力数据之前处理来自主计算机的命令。 该方法包括打开电源的步骤; 执行开始操作,不包括产生柔性电缆的校正张力数据; 在执行开始操作的步骤之后,使来自主计算机的访问命令处于可执行状态; 以及执行所述柔性电缆的校正张力数据的产生,其中所述步骤是使来自主计算机的访问命令处于可执行状态。
    • 15. 发明授权
    • Abnormality detecting method and device for position detecting device, and electric power steering device
    • 位置检测装置异常检测方法及装置及电动助力转向装置
    • US06615152B2
    • 2003-09-02
    • US09969724
    • 2001-10-04
    • Chiaki FujimotoYukio Fukushima
    • Chiaki FujimotoYukio Fukushima
    • G06F1500
    • B62D5/0487B62D5/049
    • In an abnormality detecting device for a position detecting device which generates an amplitude-modulated or phase-modulated signal from a position sensor according to the rotational position of the rotor of a motor when a reference signal having a predetermined periodic waveform is supplied, there are provided a bias current applying unit made of a passage including a resistance of applying DC bias current to an output winding of the position sensor, positional abnormality detecting units for detecting a biased DC signal of an amplitude-modulated or phase-modulated signal applied to the output winding apart from a position detector circuit for detecting the rotational position of the rotor, and an abnormality detection judgment processing part for judging abnormality of the position detecting device from a DC signal detected by the positional abnormality detecting units.
    • 在一个位置检测装置的异常检测装置中,当提供具有预定的周期波形的参考信号时,根据电动机的转子的旋转位置从位置传感器产生幅度调制或相位调制信号, 提供一个偏置电流施加单元,该通道包括向该位置传感器的输出绕组施加DC偏置电流的电阻,用于检测施加到该位置传感器的调幅或相位调制信号的偏置DC信号的位置异常检测单元 从用于检测转子的旋转位置的位置检测器电路输出的输出绕组;以及异常检测判断处理部,用于根据由位置异常检测单元检测到的DC信号来判断位置检测装置的异常。
    • 16. 发明授权
    • Disk device, track positioning method and method for generating a position error signal
    • 磁盘设备,轨道定位方法和产生位置误差信号的方法
    • US06476997B2
    • 2002-11-05
    • US09120906
    • 1998-07-22
    • Yukio FukushimaTetsuo UedaToshio KakiharaHideo Asano
    • Yukio FukushimaTetsuo UedaToshio KakiharaHideo Asano
    • G11B5596
    • G11B5/59627
    • A disk device, track positioning method, and method for generating a position error signal in which the occurrence of a wrong correction operation can be prevented by creating an appropriate PES without using a burst pattern having a defect, and reassign sectors can be decreased by decreasing defective sectors thereby to reduce the performance degradation is disclosed. In the disk device and track positioning method, the defect of a burst pattern read out from a disk is detected, and if a defect is detected in the burst pattern, a data value corresponding to the sum data of the burst pattern pair having the defect detected is obtained by measuring the maximum amplitude value of the burst pattern pairing with the burst pattern having the defect detected, and a PES is created according to the amplitude of the burst pattern having the defect detected and the maximum amplitude value.
    • 一种磁盘装置,轨道定位方法以及用于产生位置误差信号的方法,其中可以通过在不使用具有缺陷的脉冲串模式的情况下创建适当的PES来防止出现错误的校正操作,并且可以通过减少重新分配扇区来减少重新分配扇区 缺陷扇区,从而降低性能下降。 在盘装置和轨迹定位方法中,检测从盘读出的脉冲串模式的缺陷,并且如果在脉冲串模式中检测到缺陷,则与具有缺陷的脉冲串模式对的和数据相对应的数据值 通过测量与检测到缺陷的脉冲串模式匹配的脉冲串模式的最大幅度值,并且根据具有检测到的缺陷的脉冲串模式的幅度和最大振幅值来创建PES来获得检测到的。
    • 18. 发明授权
    • Disk drive apparatus and head switching method
    • 磁盘驱动装置和磁头切换方法
    • US5943179A
    • 1999-08-24
    • US747296
    • 1996-11-12
    • Yukio Fukushima
    • Yukio Fukushima
    • G11B21/08G11B5/55G11B21/10G11B5/596
    • G11B5/5534
    • Tilt values between heads in a disk drive apparatus are previously measured. The measured values are stored in a head switch compensation table. In a head switch operation, a track nearest to the present position of a head to be used after a head switch operation is selected as a target track for the head to be used. A head switch compensation table is stored in a disk. The head switch compensation table stores tilt values represented by a number of tracks which corresponds to a relative deviation between heads. For example, if the table contains data showing that a tilt value between head 1 and head 2 is +1 track, then when heads are switched from head 1 to head 2, a target track for head 2 is selected by adding this value +1 to the current track address on which head 1 is positioned. By this method, head 2 can be positioned on the nearest track by a short time seek operation and can continue a sequential read or write operation.
    • 先前测量磁盘驱动装置中的磁头之间的倾斜值。 测量值存储在磁头开关补偿表中。 在头切换操作中,选择在头切换操作之后最靠近头部的当前位置的轨迹作为要使用的头的目标轨迹。 磁头开关补偿表存储在磁盘中。 头开关补偿表存储由与磁头之间的相对偏差相对应的轨道数表示的倾斜值。 例如,如果该表包含表示头部1和头部2之间的倾斜值为+1轨道的数据,则当头部从头部1切换到头部2时,通过将该值+1加1来选择头部2的目标轨迹 到头1所在的当前轨道地址。 通过这种方法,头2可以通过短时间寻找操作定位在最近的轨道上,并且可以继续顺序读取或写入操作。