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    • 1. 发明授权
    • Seek control method of hard disk drive, recording medium storing method and hard disk drive adopting method
    • 寻求硬盘驱动器的控制方法,记录介质存储方法和硬盘驱动器采用方法
    • US07430093B2
    • 2008-09-30
    • US11480443
    • 2006-07-05
    • Jung-ho LeeDa-woon ChungDong-wook LeeByoung-kul Ji
    • Jung-ho LeeDa-woon ChungDong-wook LeeByoung-kul Ji
    • G11B5/596
    • G11B5/5565G11B5/5547
    • The present invention relates to a hard disk drive performing a seek control method using a multi-sinusoidal wave acceleration profile, where the seek control method is capable of coping with a variation in a voice coil motor driving current due to variances in a peripheral environment. The seek control method of the present invention includes: calculating a seek time scaling (STC) related to variations in a voice coil motor (VCM) driving current due to variation in a peripheral environment; calculating an acceleration distance ratio (ALR) of an acceleration distance to a maximum seek distance without a coast mode according to the STC; calculating position profiles in an acceleration mode, the coast mode and a deceleration mode, respectively, using both the STC and the ALR; and performing a seek operation by generating the VCM driving current according to the position profiles and applying the VCM driving current to a VCM.
    • 本发明涉及一种执行使用多正弦波加速度分布的搜索控制方法的硬盘驱动器,其中搜索控制方法能够应对由于周边环境的变化而导致的音圈马达驱动电流的变化。 本发明的搜索控制方法包括:计算由于周边环境的变化而导致的音圈电机(VCM)的变化相关的寻道时间缩放(STC)的驱动电流; 根据STC计算加速距离与没有惯性模式的最大寻道距离的加速距离比(ALR); 使用STC和ALR两者分别在加速模式,惯性模式和减速模式下计算位置分布; 并通过根据位置分布生成VCM驱动电流并将VCM驱动电流施加到VCM来执行寻道操作。
    • 4. 发明授权
    • Track-seek control method of HDD and recording medium suitable for the same
    • 适用于其的HDD和记录介质的追踪控制方法
    • US07315432B2
    • 2008-01-01
    • US11263800
    • 2005-11-02
    • Jung-ho Lee
    • Jung-ho Lee
    • G11B5/596
    • G11B5/5547
    • A seek control method of smoothly changing to a coast mode and a deceleration mode in a track-seek control device according to a multi-sinusoidal acceleration trajectory, a recording medium suitable for the same, and an HDD adopting the same. The method includes: calculating time of an accelerating duration from a position trajectory corresponding to a maximum seek distance that can be reached without the coast mode; calculating a position trajectory for a seek control including a coasting duration based on the time of the accelerating duration; calculating an acceleration trajectory and a velocity trajectory corresponding to the calculated position trajectory; and performing the seek control including the coast mode using the calculated acceleration trajectory, velocity trajectory, and position trajectory. Accordingly, in the seek control of the HDD including the coast mode, the coast mode can be smoothly controlled by obtaining the time of an acceleration duration from a position trajectory for track-seeking without the coast mode and calculating an acceleration trajectory, a velocity trajectory, and a position trajectory for a seek including the coast mode based on the obtained time of the acceleration duration.
    • 根据多正弦加速度轨迹,轨道搜索控制装置中平滑地改变为惯性模式和减速模式的寻道控制方法,适用于其的记录介质和采用该方法的HDD。 该方法包括:从不具有惯性模式的可达到的最大寻找距离的位置轨迹计算加速持续时间; 基于所述加速持续时间来计算包括所述惯性持续时间的搜索控制的位置轨迹; 计算对应于计算出的位置轨迹的加速度轨迹和速度轨迹; 并使用所计算的加速度轨迹,速度轨迹和位置轨迹来执行包括海岸模式的寻道控制。 因此,在包括滑行模式的HDD的搜索控制中,可以通过从没有惯性模式的轨迹寻找的位置轨迹获得加速持续时间的时间来平滑地控制滑行模式,并且计算加速轨迹,速度轨迹 以及基于所获得的加速持续时间的包括滑行模式的搜索的位置轨迹。
    • 6. 发明申请
    • Servo control method, apparatus using the same, and recording medium having program for executing the method
    • 伺服控制方法,使用该伺服控制方法的装置,以及具有用于执行该方法的程序的记录介质
    • US20070025011A1
    • 2007-02-01
    • US11444298
    • 2006-06-01
    • Jung-ho Lee
    • Jung-ho Lee
    • G11B5/596
    • G11B5/5547
    • A sequential seek method for a hard disc drive, a hard disc drive using the same, and a computer readable recording medium storing a program to execute the same. The method includes calculating a seek length by comparing a cylinder number of a current track with a cylinder number of a target track; checking if the seek length corresponding to a cylinder number is equal to or smaller than 2; calculating a seek length by comparing a position of a head in a current data track with a position of the head in a center line of a target data track if the seek length corresponding to the cylinder number is equal to or smaller than 2; calculating a seek time corresponding to the seek length corresponding to the head position; calculating seek trajectories based on the seek time denoted by a head position and the seek length thereof; and controlling a current being applied to a voice coil motor to move the head along the calculated trajectories calculated.
    • 用于硬盘驱动器的顺序搜索方法,使用其的硬盘驱动器以及存储执行该程序的计算机可读记录介质。 该方法包括:通过将当前轨道的气缸数与目标轨道的气缸数进行比较来计算寻道长度; 检查对应于气缸数的寻道长度是否等于或小于2; 如果与气缸数相对应的寻道长度等于或小于2,则通过将当前数据轨道中的头部的位置与目标数据轨道的中心线中的头部的位置进行比较来计算寻道长度; 计算对应于与头部位置对应的寻道长度的寻道时间; 基于由头位置和寻道长度表示的寻道时间来计算搜索轨迹; 以及控制施加到音圈电机的电流,以沿所计算的计算的轨迹移动头部。
    • 7. 发明申请
    • Torque constant correction method in multiple sinusoidal seek servo and disk drive using the same
    • 多个正弦寻找伺服和磁盘驱动器中的转矩常数校正方法采用相同的方式
    • US20060158772A1
    • 2006-07-20
    • US11263801
    • 2005-11-02
    • Jung-ho LeeKwang-jo Jung
    • Jung-ho LeeKwang-jo Jung
    • G11B5/596
    • G11B5/5547
    • A disk drive control method and apparatus. In particular, a torque constant correction method and apparatus in a disk drive using a multiple sinusoidal seek servo scheme. The torque constant correction method includes: performing a test seek routine for torque constant correction by using a multiple sinusoidal seek scheme; storing a seek driving current trajectory value for driving a voice coil motor, the seek driving current trajectory value being generated from the test seek routine; calculating a primary harmonic sinusoidal coefficient by performing a discrete Fourier transformation on the driving current trajectory value; calculating a primary harmonic sinusoidal coefficient from a multiple-sinusoidal-seek design current trajectory applied to the test seek; and defining a torque constant correction value as a ratio of the primary harmonic sinusoidal coefficient calculated by performing the discrete Fourier transformation to the primary harmonic sinusoidal coefficient calculated from a multiple-sinusoidal-seek design current trajectory.
    • 磁盘驱动器控制方法和装置。 特别地,使用多重正弦寻找伺服方案的磁盘驱动器中的转矩常数校正方法和装置。 扭矩常数校正方法包括:通过使用多重正弦寻找方案来执行用于转矩恒定校正的测试寻道程序; 存储用于驱动音圈电机的寻道驱动电流轨迹值,所述寻道驱动电流轨迹值是从所述测试寻道程序产生的; 通过对驱动电流轨迹值进行离散傅里叶变换来计算一次谐波正弦系数; 从应用于测试寻道的多次正弦搜索设计当前轨迹计算一次谐波正弦系数; 并且将扭矩常数校正值定义为通过执行离散傅里叶变换计算的一次谐波正弦系数与从多次正弦寻找设计当前轨迹计算出的一次谐波正弦系数的比率。
    • 8. 发明申请
    • Track-seek control method of HDD and recording medium suitable for the same
    • 适用于其的HDD和记录介质的追踪控制方法
    • US20060139792A1
    • 2006-06-29
    • US11263800
    • 2005-11-02
    • Jung-ho Lee
    • Jung-ho Lee
    • G11B5/596
    • G11B5/5547
    • A seek control method of smoothly changing to a coast mode and a deceleration mode in a track-seek control device according to a multi-sinusoidal acceleration trajectory, a recording medium suitable for the same, and an HDD adopting the same. The method includes: calculating time of an accelerating duration from a position trajectory corresponding to a maximum seek distance that can be reached without the coast mode; calculating a position trajectory for a seek control including a coasting duration based on the time of the accelerating duration; calculating an acceleration trajectory and a velocity trajectory corresponding to the calculated position trajectory; and performing the seek control including the coast mode using the calculated acceleration trajectory, velocity trajectory, and position trajectory. Accordingly, in the seek control of the HDD including the coast mode, the coast mode can be smoothly controlled by obtaining the time of an acceleration duration from a position trajectory for track-seeking without the coast mode and calculating an acceleration trajectory, a velocity trajectory, and a position trajectory for a seek including the coast mode based on the obtained time of the acceleration duration.
    • 根据多正弦加速度轨迹,轨道搜索控制装置中平滑地改变为惯性模式和减速模式的寻道控制方法,适用于其的记录介质和采用该方法的HDD。 该方法包括:从不具有惯性模式的可达到的最大寻找距离的位置轨迹计算加速持续时间; 基于所述加速持续时间来计算包括所述惯性持续时间的搜索控制的位置轨迹; 计算对应于计算出的位置轨迹的加速度轨迹和速度轨迹; 并使用所计算的加速度轨迹,速度轨迹和位置轨迹来执行包括海岸模式的寻道控制。 因此,在包括滑行模式的HDD的搜索控制中,可以通过从没有惯性模式的轨迹寻找的位置轨迹获得加速持续时间的时间来平滑地控制滑行模式,并且计算加速轨迹,速度轨迹 以及基于所获得的加速持续时间的包括滑行模式的搜索的位置轨迹。