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：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。

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。

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。

公开(公告)号：US07411761B2

公开(公告)日：2008-08-12

申请号：US11586966

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 ,  G11B5/5565

摘要： A hard disk drive with a voice coil motor circuit that provides a current to a voice coil motor to perform a seek routine in a seek time. The disk drive includes a temperature sensor to sense a temperature of the disk drive and a voltage sensor to sense the voltage of the voice coil motor. The circuit adjust the seek time dependent upon the sensed temperature and voltage. By way of example, the circuit will increase the seek time if there is an increase in temperature and/or a decrease in voltage.

摘要翻译： 具有音圈电机电路的硬盘驱动器，其在寻道时间向音圈电机提供电流以执行寻道例程。 磁盘驱动器包括用于感测磁盘驱动器的温度的温度传感器和用于感测音圈电机的电压的电压传感器。 该电路根据检测的温度和电压来调整寻道时间。 作为示例，如果温度升高和/或电压降低，电路将增加寻道时间。

公开(公告)号：US20080117540A1

公开(公告)日：2008-05-22

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： G11B21/04

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.

公开(公告)号：US20080088964A1

公开(公告)日：2008-04-17

申请号：US11580181

申请日：2006-10-11

申请人： Chang-Ik Kang

发明人： Chang-Ik Kang

IPC分类号： G11B5/596

CPC分类号： G11B5/5526

摘要： A hard disk drive with a voice coil motor controlled by a circuit. 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 settle mode that has an initial state and a velocity versus head position eigenvector. The eigenvector is changed to coincide with on the initial state when the seek routine enters the settle mode. Changing the eigenvector to coincide with the initial state induces a head velocity and movement with minimal overshoot or undershoot during the settle mode.

摘要翻译： 具有由电路控制的音圈电机的硬盘驱动器。 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。 搜索例程包括具有初始状态和速度与头部位置特征向量的结算模式。 当搜索例程进入结算模式时，特征向量被改变为与初始状态一致。 改变特征向量与初始状态一致，在稳定模式期间引起头部速度和运动，同时具有最小的过冲或下冲。

公开(公告)号：US6023390A

公开(公告)日：2000-02-08

申请号：US885739

申请日：1997-06-30

申请人： Chang-Ik Kang

发明人： Chang-Ik Kang

IPC分类号： G11B21/03 ,  G11B5/596

CPC分类号： G11B5/59627

摘要： A control algorithm compensates for a bias force disturbance and a runout disturbance of an actuator by means of a state feedback to decrease the number of the design parameters, thereby simplifying the design process. A compensation system for the disturbances includes a state variable calculating device for receiving a discrete feedback input signal representative of an actual position of a magnetic head mounted on a front end of the actuator, so as to generate state variables; a differentiating device for differentiating the discrete feedback input signal to generate a velocity signal; and a state feedback control device for receiving the state variables, the velocity signal and the discrete feedback input signal, so as to generate a discrete control input signal to be applied to the actuator.

摘要翻译： 控制算法通过状态反馈来补偿致动器的偏置力扰动和跳动扰动，以减少设计参数的数量，从而简化了设计过程。 用于干扰的补偿系统包括状态变量计算装置，用于接收表示安装在致动器前端上的磁头的实际位置的离散反馈输入信号，以便产生状态变量; 用于区分离散反馈输入信号以产生速度信号的微分装置; 以及状态反馈控制装置，用于接收状态变量，速度信号和离散反馈输入信号，以产生要施加到致动器的离散控制输入信号。

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。

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.