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    • 11. 发明授权
    • Storage apparatus having device for controlling track jump of a positioner
    • 具有用于控制定位器的轨道跳跃的装置的存储装置
    • US06628576B1
    • 2003-09-30
    • US09541573
    • 2000-04-03
    • Ichiro WatanabeTakayuki Kawabe
    • Ichiro WatanabeTakayuki Kawabe
    • G11B1926
    • G11B7/08505
    • A track jump control unit adds an FF signal for repetitive disturbance compensation obtained by a learning control which is used in a track-following control and a final value of an FB control low band component just before a track jump to a track jump signal to move a light spot to an adjacent track, thereby driving a carriage. As a track jump signal, a first kick pulse of a predetermined acceleration and a predetermined time, a second kick pulse which continues at a predetermined acceleration until a detection of a track zero-cross point, and a brake pulse of a predetermined acceleration (deceleration) and a predetermined time are used.
    • 轨道跳跃控制单元添加FF信号,用于通过跟踪追踪控制中使用的学习控制获得的重复干扰补偿,以及恰好在轨道跳转到轨道跳转信号之前的FB控制低频带分量的最终值移动 一个光点到相邻的轨道,从而驱动一个滑架。 作为轨迹跳跃信号,预定加速度和预定时间的第一反冲脉冲,以预定加速度继续直到检测到轨迹零交叉点的第二反冲脉冲和预定加速度的制动脉冲(减速度 )并且使用预定时间。
    • 19. 发明授权
    • Storage apparatus
    • 储存装置
    • US06542917B1
    • 2003-04-01
    • US09476286
    • 1999-12-30
    • Ichiro WatanabeTakayuki Kawabe
    • Ichiro WatanabeTakayuki Kawabe
    • G06F738
    • G06F7/49989G06F7/5525
    • An approximate value calculating unit is provided for a storage apparatus in which a seek control is performed by speed controlling a head. When a square root arithmetic operation is needed in the calculation of a seek speed target value which is used in the seek control, the approximate value calculating unit divides a range of an input value x serving as a target of the square root arithmetic operation into a plurality of intervals, sets a polynomial of degree N to approximately output a square root {square root over ( )}x of the input value x as an approximate function every interval, and calculates the square root approximate value of the input value x by selectively using the approximate function corresponding to the interval to which the input value x belongs. Further, according to the range dividing method of the input value x, it is sufficient that the polynomial of degree N or the approximate function by the reference table is prepared only for the basic range, and there is no need to prepare the approximate function which covers the range before the input value x. Even when the square root approximate value for the input value x belonging to the range out of the basic range is obtained by executing the input scale conversion and output scale conversion, the approximate function prepared for the basic range can be used.
    • 为通过速度控制头执行寻道控制的存储装置提供近似值计算单元。 当在搜索控制中使用的搜索速度目标值的计算中需要平方根算术运算时,近似值计算单元将用作平方根算术运算的目标的输入值x的范围除以 多个间隔,设置度数N的多项式近似地输出平方根(平方根(输入值x的x作为每个间隔的近似函数),并且通过选择性地使用输入值x来计算输入值x的平方根近似值 近似函数对应于输入值x所属的间隔,此外,根据输入值x的范围分割方法,只有为了使参考表的度数N或近似函数的多项式仅适用于 基本范围,并且不需要准备覆盖输入值x之前的范围的近似函数,即使当平方根近似值为 通过执行输入刻度转换和输出刻度转换来获得属于基本范围之外的输入值x,可以使用为基本范围准备的近似功能。