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    • 31. 发明授权
    • Spindle synchronization controller using advance calculation and offset
values
    • 主轴同步控制器采用预先计算和偏移值
    • US5497277A
    • 1996-03-05
    • US335599
    • 1994-11-08
    • Eisaku Takahashi
    • Eisaku Takahashi
    • G11B19/28G11B27/10G11B27/13G11B15/46
    • G11B19/28G11B27/10G11B27/13
    • A spindle sync control system for a plurality of magnetic disk drives connected in parallel to a host computer. The system is capable of reducing lost time and preventing a system from going down. The system includes a discriminator (25A) for discriminating the presence or absence of a reference index, a medium index and a Hall index; an offset calculator (25B) for calculating an offset value between the medium, index and Hall index before starting spindle sync control; a memory means (26) for storing the thus calculated offset value; a phase difference calculator means (25C) for calculating a phase difference between the reference index and the medium index; and a determination means (25D) for determining a driving control value for rotating a spindle motor (7) according to the thus calculated phase difference.
    • 一种用于与主计算机并联连接的多个磁盘驱动器的主轴同步控制系统。 该系统能够减少丢失的时间并防止系统下降。 该系统包括用于区分参考索引,中等索引和霍尔索引的存在或不存在的鉴别器(25A); 偏移计算器(25B),用于在开始主轴同步控制之前计算介质,折射率和霍尔折射率之间的偏移值; 存储装置(26),用于存储由此计算的偏移值; 用于计算参考索引和介质索引之间的相位差的相位差计算器装置(25C); 以及用于根据如此计算的相位差确定用于旋转主轴电动机(7)的驱动控制值的确定装置(25D)。