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1. 发明申请

US20120019961A1 METHOD OF SEEK TRAJECTORY GENERATION FOR BETTER TRACKING AND FASTER SETTLING IN HARD DISK DRIVES 审中-公开
标题翻译：在硬盘驱动器中查找更好的跟踪和更快速设置的方法
公开(公告)号：US20120019961A1
公开(公告)日：2012-01-26
申请号：US12843264
申请日：2010-07-26
申请人： Dong Jun Lee , Chang Ik Kang , Bong Jin Lee
发明人： Dong Jun Lee , Chang Ik Kang , Bong Jin Lee
IPC分类号： G11B5/56
CPC分类号： G11B5/5547
摘要： A hard disk drive with a circuit that controls a voice coil motor. The circuit provides a driving current to the voice coil motor to move a head of the drive in a seek routine. The seek routine includes a computation of a driving current that is a function of a feedforward zero phase error tracking algorithm. Utilizing the feedforward zero phase error tracking algorithm can reduce the seek time of the drive.
摘要翻译：具有控制音圈电机的电路的硬盘驱动器。电路向音圈电机提供驱动电流，以便在寻道程序中移动驱动器的头部。搜索程序包括作为前馈零相位误差跟踪算法的函数的驱动电流的计算。利用前馈零相位误差跟踪算法可以减少驱动器的寻道时间。

2. 发明授权

US07400468B2 Vibration detector for hard disk drives 有权
标题翻译：用于硬盘驱动器的振动检测器
公开(公告)号：US07400468B2
公开(公告)日：2008-07-15
申请号：US11603370
申请日：2006-11-22
申请人： Chang-Ik Kang , Yunfeng Li , Bong-Jin Lee
发明人： Chang-Ik Kang , Yunfeng Li , Bong-Jin Lee
IPC分类号： G11B5/596
CPC分类号： G11B19/042
摘要： A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk. The disk drive includes a circuit that provides a control signal to the voice coil motor to move the head. The circuit also has a state predictor and an inversion filter that compute a vibration estimate used to detect a vibration in the drive. When a threshold vibration is detected a vibration estimate is combined with the control signal to compensate for the vibration. The circuit detects the vibration without the need for an accelerometer or other sensor.
摘要翻译：具有电路的硬盘驱动器，其向音圈电机提供控制信号以将磁头移动到磁盘上。磁盘驱动器包括向音圈电机提供控制信号以移动磁头的电路。该电路还具有状态预测器和反演滤波器，其计算用于检测驱动器中的振动的振动估计。当检测到阈值振动时，将振动估计与控制信号组合以补偿振动。该电路检测振动，无需加速度计或其他传感器。

3. 发明授权

US07379262B2 Higher-order state estimator for low TMR in hard disk drives 失效
标题翻译：用于硬盘驱动器中低TMR的高阶状态估计器
公开(公告)号：US07379262B2
公开(公告)日：2008-05-27
申请号：US11586965
申请日：2006-10-25
申请人： Chang-Ik Kang , Yungfeng Li
发明人： Chang-Ik Kang , Yungfeng Li
IPC分类号： G11B5/596
CPC分类号： G11B5/596
摘要： A hard disk drive with a servo circuit that provides a control signal to a voice coil motor to perform a servo to align a head with a disk track of the drive. The servo circuit includes a fifth order state estimator that provides five estimates that are used to create the control signal. The fifth order state estimator may incorporate a first flexible mode of the voice coil motor to calculate the estimates.
摘要翻译：具有伺服电路的硬盘驱动器，其向音圈电机提供控制信号以执行伺服以将磁头与驱动器的磁盘轨道对准。伺服电路包括提供用于产生控制信号的五个估计值的第五阶状态估计器。第五阶状态估计器可以包括音圈电机的第一灵活模式以计算估计值。

4. 发明授权

US07330332B2 Method and apparatus for high-speed compensation of RRO error in hard disk drive 失效
标题翻译：硬盘驱动器RRO错误高速补偿的方法和装置
公开(公告)号：US07330332B2
公开(公告)日：2008-02-12
申请号：US11045496
申请日：2005-01-31
申请人： Sang-eun Baek , Chang-ik Kang
发明人： Sang-eun Baek , Chang-ik Kang
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： There are provided a method and apparatus for high-speed compensating repeatable run-out in a hard disk drive. The method includes a) obtaining a value of a position error signal (PES) of the hard disk drive, the PES being a relative position signal of the head with respect to the center of the target track of the disk; b) determining whether the head is in the settling mode; c) if the head is in the settling mode, compensating the RRO error without feeding back the PES; and d) if the head is in the track-following mode, compensate the RRO error by feeding back the PES. Accordingly, an excessive RRO error is compensated. Even though the hard disk drive receives an external shock or is assembled in an offline servo writing manner, the performance of the hard disk drive does not deteriorate.
摘要翻译：提供了用于在硬盘驱动器中高速补偿可重复耗尽的方法和装置。该方法包括：a）获得硬盘驱动器的位置误差信号（PES）的值，PES是磁头相对于磁盘的目标磁道的中心的相对位置信号; b）确定头部是否处于沉降模式; c）如果头部处于稳定模式，则在不反馈PES的情况下补偿RRO误差; 和d）如果磁头处于跟踪模式，则通过反馈PES来补偿RRO错误。因此，补偿了过多的RRO误差。即使硬盘驱动器受到外部冲击或以离线伺服写入方式组装，硬盘驱动器的性能也不会恶化。

5. 发明授权

US07307810B1 Method of compensating for track address discontinuity across servo track writing boundary in hard disk drives 失效
标题翻译：补偿硬盘驱动器中伺服轨迹写入边界的轨道地址不连续性的方法
公开(公告)号：US07307810B1
公开(公告)日：2007-12-11
申请号：US11545130
申请日：2006-10-09
申请人： Chang-Ik Kang
发明人： Chang-Ik Kang
IPC分类号： G11B5/55
CPC分类号： G11B5/59611 , G11B5/5547
摘要： A hard disk drive with a circuit that provides a current to a voice coil motor to move a head over a disk in a seek routine. The disk has track boundaries with discontinuities in track addresses. The circuit includes a state estimator that predicts a next state of the head. The state estimator sets an estimation error to zero when the head is over one of the track boundaries. The estimator then computes a predicted position that is used in a feed forward servo loop to generate a drive current. The drive current is provided to the voice coil motor to move the head across the disk.
摘要翻译：具有电路的硬盘驱动器，该电路向音圈电机提供电流，以在寻道程序中将磁头移动到磁盘上。磁盘具有轨道地址不连续的轨迹。该电路包括预测头部的下一个状态的状态估计器。当磁头超过磁道边界之一时，状态估计器将估计误差设置为零。然后，估计器计算在前馈伺服循环中用于产生驱动电流的预测位置。驱动电流被提供给音圈电机以使磁头移动到磁盘上。

6. 发明授权

US07292403B2 Low frequency disturbance compensation control device and disk drive using the same 失效
标题翻译：低频干扰补偿控制装置和磁盘驱动器使用相同
公开(公告)号：US07292403B2
公开(公告)日：2007-11-06
申请号：US11328114
申请日：2006-01-10
申请人： Sang-eun Baek , Sang-min Suh , Jun-seok Shim , Chang-ik Kang
发明人： Sang-eun Baek , Sang-min Suh , Jun-seok Shim , Chang-ik Kang
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A servo control device for a disk drive capable of effectively compensating for a low frequency disturbance incoming to the disk drive is provided. The servo control device includes: a state variable estimator calculating a position estimation error based on a control input for controlling motion of a head and a position error signal by using a predetermined state equation; an estimation filter calculating a disturbance estimation value from the position estimation error by using a mathematical relation between a disturbance and the position estimation error; and a subtractor subtracting the disturbance estimation value from the control input.
摘要翻译：提供了一种能够有效地补偿进入磁盘驱动器的低频干扰的用于磁盘驱动器的伺服控制装置。伺服控制装置包括：状态变量估计器，通过使用预定状态方程式，基于用于控制头部的运动的控制输入和位置误差信号来计算位置估计误差; 估计滤波器，通过使用扰动与位置估计误差之间的数学关系，从所述位置估计误差计算扰动估计值; 以及从控制输入中减去干扰估计值的减法器。

7. 发明申请

US20050078405A1 Method of generating current trajectory for seek control of hard disc drive and seek control system using the same 失效
标题翻译：产生用于硬盘驱动器的寻道控制的当前轨迹的方法和使用该轨迹的控制系统
公开(公告)号：US20050078405A1
公开(公告)日：2005-04-14
申请号：US10959209
申请日：2004-10-07
申请人： Sang-eun Baek , Chang-ik Kang
发明人： Sang-eun Baek , Chang-ik Kang
IPC分类号： G11B21/08 , G11B5/596 , G11B21/02
CPC分类号： G11B5/59611
摘要： Provided are a method of generating a current trajectory for seek control of a hard disc drive and a seek control system using the same, the method including setting a current trajectory from harmonics of a sinusoidal wave; calculating a power consumed by a target device to be controlled using the current trajectory; and determining coefficients of the harmonics so as to minimize the power consumed by the device.
摘要翻译：提供了一种生成用于硬盘驱动器的搜索控制的当前轨迹和使用其的搜索控制系统的方法，该方法包括从正弦波的谐波设置当前轨迹; 计算使用当前轨迹控制的目标装置所消耗的功率; 以及确定谐波的系数，以使装置消耗的功率最小化。

8. 发明授权

US07813076B2 Method for estimating position error gain for hard disk drives 失效
标题翻译：估计硬盘驱动器位置误差增益的方法
公开(公告)号：US07813076B2
公开(公告)日：2010-10-12
申请号：US12203855
申请日：2008-09-03
申请人： Chang Ik Kang , Sang Hoon Chu
发明人： Chang Ik Kang , Sang Hoon Chu
IPC分类号： G11B5/596
CPC分类号： G11B5/59622 , G11B5/59688
摘要： A hard disk drive with a controller that determines a position error signal gain. The position error signal gain is determined from a total servo loop gain and a function that is defined by a slope of a line of A and B servo bits measured at N off-track positions. The function determines an actual plant gain and thus provides a more accurate position error signal gain.
摘要翻译：具有控制器的硬盘驱动器，用于确定位置误差信号增益。位置误差信号增益由总伺服环路增益和由在N个非轨道位置测量的A和B伺服位的行的斜率确定的函数确定。该功能确定实际的工厂增益，从而提供更准确的位置误差信号增益。

9. 发明授权

US07760455B2 Method and apparatus improving prevention of off-track writing in a hard disk drive 失效
标题翻译：改善防止在硬盘驱动器中偏离轨迹写入的方法和装置
公开(公告)号：US07760455B2
公开(公告)日：2010-07-20
申请号：US11788450
申请日：2007-04-19
申请人： Chang-Ik Kang , Bong-Jin Lee
发明人： Chang-Ik Kang , Bong-Jin Lee
IPC分类号： G11B5/09
CPC分类号： G11B19/045 , G11B5/596
摘要： Embodiments of the invention include: a hard disk drive using a read track to position for writing to a write track and generating a position error signal (PES) based upon all four servo offset bursts used to disable writing when the PES exceeds a position error threshold; a preamplifier generating the PES from four bursts from a slider reading the read track to position when the write track is to be written, and methods of writing the write track using PES from four bursts of the read track that disables writing when the PES is above the position error threshold.
摘要翻译：本发明的实施例包括：使用读磁道定位以写入写磁道的硬盘驱动器，并且当PES超过位置误差阈值时，基于用于禁止写入的所有四个伺服偏移脉冲串产生位置误差信号（PES） ; 一个前置放大器，从写入轨道的读取滑块的滑块的四个脉冲串中产生PES，以及当PES高于写入轨迹时，从读取轨迹的四个脉冲串中写入磁道写入轨迹的方法位置误差阈值。

10. 发明授权

US07394614B2 Control method to reduce settle TMR in hard disk drives 失效
公开(公告)号：US07394614B2
公开(公告)日：2008-07-01
申请号：US11586964
申请日：2006-10-25
申请人： Chang-Ik Kang
发明人： Chang-Ik Kang
IPC分类号： G11B5/596
CPC分类号： G11B5/5547
摘要： A hard disk drive with a circuit that provides a control signal to a voice coil motor to move a head across a disk of a drive. The circuit includes a state estimator that provides a plurality of state estimates and a disturbance estimator that provides a disturbance estimate that is combined with the state estimates to define the control signal. The disturbance estimator compensates for flex cable disturbances, particularly during a settle mode of a seek routine.

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