公开(公告)号：US07203028B2

公开(公告)日：2007-04-10

申请号：US10462803

申请日：2003-06-17

申请人： Da-woon Chung ,  Chang-Ik Kang ,  Chan-hyuck Boo

发明人： Da-woon Chung ,  Chang-Ik Kang ,  Chan-hyuck Boo

IPC分类号： G11B5/596

CPC分类号： G11B5/59633

摘要： A fast settling servo control method and apparatus for a hard disc drive and a method and apparatus estimate an acceleration coefficient of a voice coil motor (VCM) actuator suitable for the settling servo control method and apparatus for disc drives, which allow a head to stably and rapidly move to a target track when a track seek operation is performed in the hard disk drive. The settling servo control apparatus includes a state estimator which estimates position information of a head, velocity information of the head, voice coil motor (VCM) current information, and external disturbance information based on a position error signal (PES); a feedback gain multiplier which respectively multiplies the position information of the head and the velocity information of the head by predetermined feedback control gains each and outputs the multiplication results as feedback control inputs; a pulse generator which generates a pulse signal used for cancellation of slow poles with reference to at least one of initial VCM current information, initial external disturbance information, and previous control input information as well as initial position information of a head and initial velocity information of the head; and an adder which sums the feedback control inputs, the external disturbance information, and the pulse signal generated from the pulse generator and outputs the summation result to a voice coil motor (VCM) actuator as a control input.

摘要翻译： 一种用于硬盘驱动器的快速建立伺服控制方法和装置，以及方法和装置估计适合于用于盘驱动器的沉降伺服控制方法和装置的音圈电动机（VCM）致动器的加速系数，其允许磁头稳定 并且当在硬盘驱动器中执行轨道搜索操作时，快速移动到目标轨道。 沉降伺服控制装置包括基于位置误差信号（PES）来估计头部的位置信息，头部的速度信息，音圈电机（VCM）电流信息和外部干扰信息的状态估计器; 反馈增益乘法器，分别将头部的位置信息和头部的速度信息分别乘以预定的反馈控制增益，并输出乘法结果作为反馈控制输入; 参考初始VCM电流信息，初始外部干扰信息和先前控制输入信息中的至少一个以及头部的初始位置信息和初始速度信息的初始位置信息，生成用于缓慢磁极消除的脉冲信号的脉冲发生器 头部; 以及加法器，其将反馈控制输入，外部干扰信息和从脉冲发生器产生的脉冲信号相加，并将求和结果输出到作为控制输入的音圈电动机（VCM）致动器。

公开(公告)号：US07057842B2

公开(公告)日：2006-06-06

申请号：US10984746

申请日：2004-11-10

申请人： Da-woon Chung ,  Kwang-jo Jung

发明人： Da-woon Chung ,  Kwang-jo Jung

IPC分类号： G11B21/02

CPC分类号： G11B5/59633

摘要： An offline self servo writing method capable of improving servo writing accuracy and reducing copying time by designing a servo pattern of a reference disk to have the same resolution as a final servo pattern, and a disk drive using the method. The offline self servo writing method includes a servo information writing process performed after a reference disk, where a reference servo pattern having the same resolution as a final servo pattern, is written and one or more blank disks are assembled in the disk drive, wherein the servo information writing process is performed by simultaneously writing identical final servo information on all disks including the reference disk by using the reference servo pattern while following tracks of the reference disk.

摘要翻译： 一种离线自伺服写入方法，其能够通过设计参考盘的伺服模式来提高伺服写入精度并缩短复印时间，以使其具有与最终伺服模式相同的分辨率，以及使用该方法的磁盘驱动器。 离线自伺服写入方法包括在参考盘之后执行的伺服信息写入处理，其中写入具有与最终伺服模式相同的分辨率的参考伺服模式，并且将一个或多个空白盘组装在盘驱动器中，其中 伺服信息写入处理通过在跟踪参考盘的轨道的同时使用参考伺服模式同时在包括参考盘的所有盘上写入相同的最终伺服信息来执行。

公开(公告)号：US07031094B2

公开(公告)日：2006-04-18

申请号：US10972562

申请日：2004-10-26

申请人： Da-woon Chung

发明人： Da-woon Chung

IPC分类号： G11B21/02

CPC分类号： G11B19/04 ,  G01H13/00 ,  G11B7/0946

摘要： A method and an apparatus detect and compensate for a mechanical resonance frequency occurring in a system. The apparatus includes an excitation unit that increases a gain of a predetermined frequency band of a driving signal, a resonance frequency detector frequency-transforming a response signal, and detecting the resonance frequency in a frequency domain, an excitation signal generator separately generating a first excitation signal and a second excitation signal, a mixer mixing one of the first excitation signal or the second excitation signal with a driving signal that does not pass through the excitation unit, and inputting a result of the combination to the system, a resonance determination unit determining whether resonance occurs in the system, and a system controller determining a frequency of one of the first excitation signal or the second excitation signal input when resonance occurs in the system, as the resonance frequency.

摘要翻译： 一种方法和装置检测和补偿在系统中发生的机械共振频率。 该装置包括：激励单元，其增加驱动信号的预定频带的增益，谐振频率检测器对响应信号进行频率变换，以及检测频域中的谐振频率;激励信号发生器，分别产生第一激励 信号和第二激励信号，混合第一激励信号或第二激励信号中的一个与不通过激励单元的驱动信号并将该组合的结果输入到系统的混合器;谐振确定单元确定 是否在系统中发生共振，以及系统控制器确定在系统中发生谐振时输入的第一激励信号或第二激励信号之一的频率作为谐振频率。

公开(公告)号：US07663832B2

公开(公告)日：2010-02-16

申请号：US11287406

申请日：2005-11-28

申请人： Da-woon Chung ,  Jun Jeong

发明人： Da-woon Chung ,  Jun Jeong

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59627 ,  G11B5/59666

摘要： A method and apparatus for exactly compensating for a track zero position when copying a reference servo pattern in a disc drive adopting a reference servo track copying method. The method of compensating for a track zero position in a reference servo track copy system for copying a reference servo pattern in a head disc assembly into which a reference disc, on which the reference servo pattern is recorded, produced offline and at least one blank disc are assembled, includes: searching for a collision position of an actuator arm against a stopper for limiting the displacement of the actuator arm on the reference servo pattern; calculating an optimal track zero position based on the searched collision position; and copying the reference servo pattern on all disc surfaces from the calculated optimal track zero position.

摘要翻译： 一种在采用基准伺服轨道复制方法的盘驱动器中复制参考伺服模式时，用于精确补偿轨道零位置的方法和装置。 补偿参考伺服轨道复制系统中的轨道零位置的方法，用于复制头盘组件中的参考伺服模式，其中记录有参考伺服模式的参考盘离线产生，并且至少一个空白盘 包括：将致动器臂的碰撞位置抵靠止动件，以限制致动器臂在基准伺服模式上的位移; 基于搜索的碰撞位置计算最佳轨迹零位置; 并将所述盘表面上的参考伺服图案从所计算的最佳轨迹零位置复制。

公开(公告)号：US07430093B2

公开(公告)日：2008-09-30

申请号：US11480443

申请日：2006-07-05

申请人： Jung-ho Lee ,  Da-woon Chung ,  Dong-wook Lee ,  Byoung-kul Ji

发明人： Jung-ho Lee ,  Da-woon Chung ,  Dong-wook Lee ,  Byoung-kul Ji

IPC分类号： G11B5/596

CPC分类号： G11B5/5565 ,  G11B5/5547

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07333286B2

公开(公告)日：2008-02-19

申请号：US11528547

申请日：2006-09-28

申请人： Kwang-jo Jung ,  Da-woon Chung ,  Byoung-kul Ji

发明人： Kwang-jo Jung ,  Da-woon Chung ,  Byoung-kul Ji

IPC分类号： G11B21/02

CPC分类号： G11B5/59661 ,  G11B5/59633

摘要： In a method of writing a reference servo signal of a hard disk drive having a spiral reference servo signal that is referred to when writing a final servo signal is written while a head is moved across a disk for a predetermined time at a target movement velocity, an actual movement velocity of the head is detected from a counter electromotive force generated in a voice coil motor that moves that head, for the predetermined time during which the spiral reference servo signal is written, and the head is controlled to maintain the target movement velocity by feeding back the detected actual movement velocity.

摘要翻译： 在头部以目标移动速度在盘上移动预定时间的同时，在写入写入最终伺服信号时参考的具有螺旋参考伺服信号的硬盘驱动器的参考伺服信号的写入方法中， 从在音圈电动机中产生的反电动势中检测头部的实际移动速度，该音调电动机在将螺旋基准伺服信号写入的预定时间内移动该头部，并且控制头部以保持目标移动速度 通过反馈检测到的实际移动速度。

公开(公告)号：US07193799B2

公开(公告)日：2007-03-20

申请号：US10155023

申请日：2002-05-28

申请人： Da-woon Chung

发明人： Da-woon Chung

IPC分类号： G11B5/09

CPC分类号： G11B5/5521 ,  G11B5/59627

摘要： An apparatus and a method to remove a resonance frequency of a system in which an unnecessary resonance frequency occurs in a head stack assembly (HSA) having a head for reading/writing data. The HSA is identified and filtered to prevent mechanical damage caused by resonance. The system is artificially excited to identify a potential resonance frequency of the system. The system is designed so that the identified resonance frequency is filtered. Thus, resonance frequency components outside of Nyquist frequency bandwidth of the system can also be identified. Also, the resonance frequency can very easily be identified in a time domain without a complicated calculation process such as an additional frequency transformation process. Coefficients of a programmable filter are updated using the identified resonance frequency to prevent mechanical damage caused by resonance and improve a servo tracking performance and reliability of data.

摘要翻译： 一种用于去除在具有用于读/写数据的磁头的磁头组组件（HSA）中发生不必要的共振频率的系统的共振频率的装置和方法。 识别和过滤HSA以防止由共振引起的机械损伤。 该系统被人为激发，以识别系统的潜在共振频率。 该系统被设计成使得所识别的共振频率被过滤。 因此，也可以识别系统的奈奎斯特频带以外的谐振频率分量。 此外，谐振频率可以非常容易地在时域中被识别，而不需要诸如额外的频率变换处理的复杂的计算过程。 使用识别的共振频率来更新可编程滤波器的系数，以防止由共振引起的机械损伤，并提高伺服跟踪性能和数据的可靠性。

公开(公告)号：US08154819B2

公开(公告)日：2012-04-10

申请号：US12774872

申请日：2010-05-06

申请人： Ho-chul Shin ,  Da-woon Chung

发明人： Ho-chul Shin ,  Da-woon Chung

IPC分类号： G11B21/02 ,  G11B15/12

CPC分类号： G11B5/6005 ,  G11B5/6064

摘要： The flying heights of magnetic heads of a disk drive are set using an FOD (flying on demand) method in a bank mode. A first signal for adjusting the flying height of a magnetic head is issued to each magnetic head and the value of the first signal is scaled by scale values set for the magnetic heads, respectively, with one of the scale values differing from the others. The value of the first signal is changed until the magnetic head associated with the scale value different from the others touches down. A flying height for the magnetic head which touched down is determined based on the value of the first signal at the time of touch-down. The process is repeated, however with a different bank of scale values each time and set in such a way as to cause the sequential touch-down of the remaining magnetic heads, and determinations of flying heights for the magnetic heads.

摘要翻译： 磁盘驱动器的磁头的飞行高度使用FOD（按需飞行）方式以存储模式设置。 用于调整磁头的飞行高度的第一信号被发送到每个磁头，并且第一信号的值分别由对于磁头设置的刻度值缩放，其中一个刻度值与其他磁头之一不同。 改变第一个信号的值，直到与不同于其他刻度的值相关联的磁头接触。 基于触摸时的第一信号的值，确定触头的磁头的飞行高度。 重复该过程，但是每次都具有不同的刻度值组，并且以这样一种方式设置，以使得剩余磁头顺序地向下触摸，以及确定磁头的飞行高度。

公开(公告)号：US20110235206A1

公开(公告)日：2011-09-29

申请号：US13053647

申请日：2011-03-22

申请人： Da-woon Chung

发明人： Da-woon Chung

IPC分类号： G11B15/18 ,  H02P6/10

CPC分类号： G11B19/28 ,  H02P23/0027

摘要： A method and apparatus for adaptively controlling a motor considering a state of disturbance applied to a system. The method includes changing a frequency bandwidth of a frequency response characteristic in a motor control system according to a state of disturbance applied to the motor control system, and controlling a speed of the motor by applying the changed frequency bandwidth to the motor control system.

摘要翻译： 考虑到施加到系统的干扰状态来自动控制电动机的方法和装置。 该方法包括根据施加到电动机控制系统的干扰状态来改变电动机控制系统中的频率响应特性的频率带宽，以及通过将变化的频率带宽应用于电动机控制系统来控制电动机的速度。

公开(公告)号：US07548390B2

公开(公告)日：2009-06-16

申请号：US11766944

申请日：2007-06-22

申请人： Jung-ho Lee ,  Da-woon Chung

发明人： Jung-ho Lee ,  Da-woon Chung

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/40 ,  G11B5/02 ,  G11B5/5521 ,  G11B19/043 ,  G11B21/12

摘要： A Hard Disk Drive (HDD) and related write control method are disclosed. The write control method includes; detecting a free fall state during a current write operation to a current sector, waiting until completion of the current write operation to the current sector, and thereafter stopping the current write operation and unloading a read/write head performing the current write operation.

摘要翻译： 公开了一种硬盘驱动器（HDD）和相关的写入控制方法。 写控制方法包括： 在对当前扇区的当前写入操作期间检测自由落体状态，等待直到对当前扇区的当前写入操作完成，然后停止当前写入操作并卸载执行当前写入操作的读/写头。