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    • 5. 发明授权
    • Automatic adjustment method and system for servo motor circuit of a
magnetic disk apparatus
    • 磁悬浮装置伺服电机电路的自动调整方法及系统
    • US5063454A
    • 1991-11-05
    • US460657
    • 1990-01-03
    • Shuichi Hashimoto
    • Shuichi Hashimoto
    • G11B5/55G11B21/08
    • G11B21/085G11B5/5547
    • An automatic adjustment system for a servo circuit of a magnetic disk apparatus having a magnetic head, a position signal preparing circuit, a speed control unit, and a position control unit. An automatic adjustment method includes monitoring a core width adjustment of the position signal while engaged in a uniform speed seek operation and adjusting a detection sensitivity of the position signal preparing circuit so that an angle of slope of the position signal becomes a predetermined value, measuring a forward/reverse seek operation time of the time between a forward seek operation and a reverse seek operation and adjusting a speed detecting offset of the speed control unit so that a difference between the forward seek operation time and the reverse seek operation time becomes minimal. A position control offset adjustment step is provided for measuring an integration value of the position signal during position control in a seek operation and adjusting the offset of the position control unit so that the integration value becomes minimal. The steps of counting a seek operation time and positioning adjustment of the seek operation time, adjusting a differentiation gain of the speed control unit so that the seek operation time becomes minimal, integrating the position signal, and adjusting a control current detection gain of the speed control unit so that the integration value becomes minimal, are also performed.
    • 7. 发明授权
    • Head positioning control apparatus of disk drive and method of
controlling the same apparatus
    • 磁盘驱动器的头部定位控制装置和控制相同装置的方法
    • US5844744A
    • 1998-12-01
    • US820637
    • 1992-01-24
    • Nobuyuki SuzukiShuichi HashimotoToshio Negoro
    • Nobuyuki SuzukiShuichi HashimotoToshio Negoro
    • G11B5/55G11B21/08G11B21/18
    • G11B5/553G11B21/083G11B21/085G11B21/18
    • A head positioning apparatus and method for a disk drive system. During each computing time of a plurality of sequential computing times: (a) a position of a servo head on a disk is computed, (b) an actual position of the servo head in the present computing time is computed, based on the computed position of the servo head and an estimated position of the servo head computed in the preceding computing time, (c) a moving distance of the servo head is computed, based on the actual positions of the servo head computed in the present computing time and in the preceding computing time, (d) an estimated position of the servo head in the present computing time, indicating an estimated position reached by the servo head at the succeeding computing time, is computed from the actual position of the servo head computed in the present computing time to the moving distance of the servo head, (e) a moving velocity of the servo head is computed based on the actual position of the servo head computed in the present computing time and the actual position of the servo head computed in the preceding computing time, (f) a remaining number of tracks up to a target track is computed, based on the actual position of the servo head computed in the present computing time, and (g) an object velocity of the servo head is obtained, based on the remaining number of tracks.
    • PCT No.PCT / JP91 / 00870 Sec。 371日期:1993年10月18日 102(e)日期1993年10月18日PCT提交1990年6月27日PCT公布。 出版物WO92 / 11636 日本1992年7月9日磁头驱动系统的头部定位装置及方法。 在多个顺序计算时间的每个计算时间期间:(a)计算一个伺服磁头在磁盘上的位置,(b)基于计算出的位置计算当前计算时间内的伺服磁头的实际位置 伺服头的计算位置和前一计算时间中计算的伺服头的估计位置,(c)基于当前计算时间内计算出的伺服头的实际位置,计算伺服头的移动距离, (d)当前计算时间内的伺服头的估计位置,表示在随后的计算时刻由伺服头达到的估计位置,根据本计算中计算的伺服头的实际位置计算 时间到伺服头的移动距离,(e)伺服头的移动速度是根据在当前计算时间内计算的伺服头的实际位置和伺服头的实际位置来计算的 (f)基于在当前计算时间中计算的伺服头的实际位置,计算直到目标轨道的剩余轨道数,以及(g)目标轨迹的目标速度, 基于剩余的轨道数获得伺服头。
    • 8. 发明授权
    • Head position detecting method and apparatus
    • 头位置检测方法和装置
    • US5523900A
    • 1996-06-04
    • US194663
    • 1994-02-08
    • Tatsuhiko KosugiShuichi HashimotoToru Shinohara
    • Tatsuhiko KosugiShuichi HashimotoToru Shinohara
    • G11B19/28G11B5/596G11B20/14G11B20/18G11B21/10
    • G11B21/106G11B5/59616
    • A head position detecting method and apparatus for detecting a phase difference from servo data on a recording medium to detect the position of a head. This head position detecting method and apparatus detect the phase differences between the read pulse of the servo data read by the head and reference clocks, and average the phase differences to detect the head position. A training area having a timing signal recorded therein is provided before the servo data on the recording medium. A phase-lock loop circuit for generating reference clocks is synchronized with the timing signal to accurately detect the phase differences. An integrator is used to average the phase differences. This design ensures accurate detection of the head position even under fast seek. Further, a phase difference signal around a target cylinder is obtained by selecting the phase of the reference clock in accordance with the position of the target cylinder.
    • 一种头位置检测方法和装置,用于检测与记录介质上的伺服数据的相位差以检测头的位置。 这种头部位置检测方法和装置检测由头部和参考时钟读取的伺服数据的读取脉冲之间的相位差,并且平均相位差以检测头部位置。 在记录介质上的伺服数据之前提供其中记录有定时信号的训练区域。 用于产生参考时钟的锁相环电路与定时信号同步,以准确地检测相位差。 积分器用于平均相位差。 这种设计确保即使在快速寻找下也能准确检测头部位置。 此外,通过根据目标气缸的位置选择参考时钟的相位来获得目标气缸周围的相位差信号。
    • 9. 发明授权
    • Method and system for positioning head on target cylinder of disk
    • 将磁头定位在磁盘目标磁盘上的方法和系统
    • US5311379A
    • 1994-05-10
    • US766399
    • 1991-09-27
    • Tohru ShinoharaShuichi Hashimoto
    • Tohru ShinoharaShuichi Hashimoto
    • G11B21/10G11B5/55G11B5/596
    • G11B5/5547
    • A method of positioning a magnetic head on a target cylinder of a magnetic disk uses a position signal derived from a servo signal which is read from a magnetic disk using a magnetic head. The servo signal includes at least first and second servo signal components on even cylinders of the magnetic disk and includes at least third and fourth servo signal components on odd cylinders of the magnetic disk. The position signal is used for moving the magnetic head to a desired cylinder. The method comprises the steps of obtaining a first position signal for positioning the magnetic head to an odd cylinder on the magnetic disk based on a difference between peak values of the first and second servo signal components, obtaining a second position signal for positioning the magnetic head to an even cylinder on the magnetic disk based on a difference between peak values of the third and fourth servo signal components, and using only one of the first and second position signals to position the magnetic head to the target cylinder depending on a cylinder address of the target cylinder.
    • 将磁头定位在磁盘的目标气缸上的方法使用从使用磁头从磁盘读取的伺服信号导出的位置信号。 伺服信号在磁盘的偶数圆柱上至少包括第一和第二伺服信号分量,并且在磁盘的奇数圆柱上包括至少第三和第四伺服信号分量。 位置信号用于将磁头移动到所需的气缸。 该方法包括以下步骤:基于第一和第二伺服信号分量的峰值之间的差,获得用于将磁头定位到磁盘上的奇数圆柱的第一位置信号,获得用于定位磁头的第二位置信号 基于第三和第四伺服信号分量的峰值之间的差异,并且仅使用第一和第二位置信号中的一个将磁头定位到目标圆柱体,根据圆柱体地址 目标气缸。