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1. 发明授权

US07031095B2 Servo controller method and apparatus for high tracks per inch hard disk drives using a delay accomodating state estimator 失效
公开(公告)号：US07031095B2
公开(公告)日：2006-04-18
申请号：US10903720
申请日：2004-07-29
申请人： Young-Hoon Kim , Sang Hoon Chu , Seong-Woo Kang , Dong-Ho Oh , Yun-Sik Han , Tae Yeon Hwang
发明人： Young-Hoon Kim , Sang Hoon Chu , Seong-Woo Kang , Dong-Ho Oh , Yun-Sik Han , Tae Yeon Hwang
IPC分类号： G11B5/596
CPC分类号： G11B5/5547 , G11B5/596
摘要： The invention applies to servo controllers for at least the voice coil motor of a hard disk drive. Today, many control algorithms require 80 to 90 percent of the sampling period to complete their calculation of the next control, making computation time delay no longer negligible. The invention accommodates the transport delay, such as computation time delay, into the state estimator and into the whole control system. Experimental results using a commercial hard drive, as well as simulation results, show that the invention's method effectively improves the hard disk drive control system stability by increasing the phase margin and gain margin. The invention includes the method of operating the servo-controller, as well as the apparatus implementing that method. The invention also includes hard disk drives containing servo-controllers implementing the method, and program systems residing in accessibly coupled memory to a computer within the servo controller implementing the method.

2. 发明申请

US20050007702A1 Method and apparatus reducing off track head motion due to disk vibration in a hard disk drive through the head gimbal assembly 失效
标题翻译：方法和装置减少由于硬盘驱动器中的磁头振动通过头部万向节组件引起的轨道头运动
公开(公告)号：US20050007702A1
公开(公告)日：2005-01-13
申请号：US10619163
申请日：2003-07-10
申请人： Dong-Ho Oh , Seong-Woo Kang , Yun-Sik Han , Young-Hoon Kim , Myeong-Eop Kim , Tae-Yeon Hwang , Jae-Won Kim
发明人： Dong-Ho Oh , Seong-Woo Kang , Yun-Sik Han , Young-Hoon Kim , Myeong-Eop Kim , Tae-Yeon Hwang , Jae-Won Kim
IPC分类号： G11B21/02 , G11B5/55 , G11B5/48
CPC分类号： G11B5/5552 , G11B5/4873 , G11B5/6011
摘要： Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms for moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention.
摘要翻译：提供了改进的头万向节组件，减少了硬盘驱动器中的TMR（跟踪错位）。这些头万向架组件与当代头万向架组件一样机械简单，在平盘表面上支撑平行的飞行滑块，并减少由磁盘振动引起的TMR。与其他已知方法相比，其轨迹密度和转速可比较容易构建，更可靠，成本更低。改进的头万向节组件包括三组机构，用于当盘表面平坦时平行于盘表面移动滑块，并且当盘表面弯曲时使滑块朝向轨道径向移动。第一和第三机构以及第二和第三机构可以一起用在头部万向架组件中。改进和独特的伺服控制器方案导致PES性能的总体改进，特别是当应用于采用本发明的TMR减小机构的硬盘驱动器时。伺服控制器在磁盘振动频率范围内取消增益，有利于提高低频干扰的抑制。当应用于具有本发明的TMR减少机制的硬盘驱动器时，这导致最低的PES统计。

3. 发明授权

US07697236B2 Method and apparatus for disk damper extending across all data tracks of a rotating disk surface upwind of the voice coil actuator in a hard disk drive 失效
标题翻译：磁盘阻尼器的方法和装置延伸到硬盘驱动器中的音圈致动器的上风向旋转盘表面的所有数据轨道上
公开(公告)号：US07697236B2
公开(公告)日：2010-04-13
申请号：US11357824
申请日：2006-04-17
申请人： Yun-Sik Han , Young-Hoon Kim , Hae-Sung Kwon , Hyung Jai Lee , Hong-Taek Lim
发明人： Yun-Sik Han , Young-Hoon Kim , Hae-Sung Kwon , Hyung Jai Lee , Hong-Taek Lim
IPC分类号： G11B33/14
CPC分类号： G11B17/038
摘要： The invention includes a disk damper containing an extended area located on the upstream side of the head stack assembly. The extended area is joined to a tail section. In the extended area, the disk damper provides a wall near the neighboring rotating disk surface that extends from the outside diameter to the inside diameter of the rotating disk surface. Experimental results have shown that this provides much more consistent dampening of disk vibrations and vibrations of a head stack assembly positioned anywhere from the inside diameter to the outside diameter. The hard disk drive including the disk damper. Using the disk damper in a hard disk drive to improve the reliability of the hard disk drive during track following. Making the hard disk drive using the disk damper, and the hard disk drive as a product of that manufacturing process.
摘要翻译：本发明包括一个盘式阻尼器，该盘式阻尼器包含位于头部堆叠组件的上游侧的延伸区域。延伸区域连接到尾部。在扩展区域中，盘式减震器在相邻的旋转盘表面附近提供了一个壁，该壁从外径延伸到旋转盘表面的内径。实验结果表明，这提供了从内径到外径位于任何地方的磁头堆叠组件的盘振动和振动的更一致的衰减。硬盘驱动器包括磁盘阻尼器。在硬盘驱动器中使用磁盘风扇，以提高跟踪期间硬盘驱动器的可靠性。使用磁盘阻尼器和硬盘驱动器作为该制造过程的产物制作硬盘驱动器。

4. 发明授权

US07630167B2 Method and apparatus to detect sub-micron particles in a hard disk drive with optical pickup 失效
标题翻译：用光学拾取器检测硬盘驱动器中的亚微米颗粒的方法和装置
公开(公告)号：US07630167B2
公开(公告)日：2009-12-08
申请号：US10842798
申请日：2004-05-10
申请人： Haesung Kwon , Hyung Jai Lee , Seong-Woo Kang , Yun-Sik Han
发明人： Haesung Kwon , Hyung Jai Lee , Seong-Woo Kang , Yun-Sik Han
IPC分类号： G11B33/14 , G11B5/00
CPC分类号： G11B23/505
摘要： A hard disk drive that includes an optical pick-up coupled to a head of a hard disk assembly (“HDA”). The head is located adjacent to a disk. The optical pick-up can sense the surface of the disk by detecting light reflected from the surface. The optical pick-up is coupled to a particle circuit that can distinguish between an embedded particle and a floating particle from the reflected light.
摘要翻译：硬盘驱动器，其包括耦合到硬盘组件（“HDA”）的头部的光学拾取器。磁头位于磁盘附近。光学拾取器可以通过检测从表面反射的光来感测盘的表面。光学拾取器耦合到可以将嵌入的颗粒和浮动颗粒与反射光区分开的粒子电路。

5. 发明授权

US07595964B2 Method for reducing off track head motion due to disk vibration in a hard disk drive through the head gimbal assembly 失效
标题翻译：一种用于通过磁头万向节组件减少由硬盘驱动器中的磁盘振动引起的轨道头运动的方法
公开(公告)号：US07595964B2
公开(公告)日：2009-09-29
申请号：US11599801
申请日：2006-11-14
申请人： Dong-Ho Oh , Seong-Woo Kang , Yun-Sik Han , Young-Hoon Kim , Myeong-Eop Kim , Tae-Yeon Hwang , Jae-Won Kim
发明人： Dong-Ho Oh , Seong-Woo Kang , Yun-Sik Han , Young-Hoon Kim , Myeong-Eop Kim , Tae-Yeon Hwang , Jae-Won Kim
IPC分类号： G11B5/60
CPC分类号： G11B5/5552 , G11B5/4873 , G11B5/6011
摘要： Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms for moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention.
摘要翻译：提供了改进的头万向节组件，减少了硬盘驱动器中的TMR（跟踪错位）。这些头万向架组件与当代头万向架组件一样机械简单，在平盘表面上支撑平行的飞行滑块，并减少由磁盘振动引起的TMR。与其他已知方法相比，其轨迹密度和转速可比较容易构建，更可靠，成本更低。改进的头万向节组件包括三组机构，用于当盘表面平坦时平行于盘表面移动滑块，并且当盘表面弯曲时使滑块朝向轨道径向移动。第一和第三机构以及第二和第三机构可以一起用在头部万向架组件中。改进和独特的伺服控制器方案导致PES性能的总体改进，特别是当应用于采用本发明的TMR减小机构的硬盘驱动器时。伺服控制器在磁盘振动频率范围内取消增益，有利于提高低频干扰的抑制。当应用于具有本发明的TMR减少机制的硬盘驱动器时，这导致最低的PES统计。

6. 发明授权

US07420764B2 Servo controller method and apparatus for high tracks per inch hard disk drives using a delay accomodating state estimator 失效
标题翻译：使用延迟适应状态估计器的每英寸硬盘驱动器的高轨道伺服控制器方法和装置
公开(公告)号：US07420764B2
公开(公告)日：2008-09-02
申请号：US11397254
申请日：2006-04-03
申请人： Young-Hoon Kim , Sang Hoon Chu , Seong-Woo Kang , Dong-Ho Oh , Yun-Sik Han , Tae Yeon Hwang
发明人： Young-Hoon Kim , Sang Hoon Chu , Seong-Woo Kang , Dong-Ho Oh , Yun-Sik Han , Tae Yeon Hwang
IPC分类号： G11B5/596
CPC分类号： G11B5/5547 , G11B5/596
摘要： The invention applies to servo controllers for at least the voice coil motor of a hard disk drive. Today, many control algorithms require 80 to 90 percent of the sampling period to complete their calculation of the next control, making computation time delay no longer negligible. The invention accommodates the transport delay, such as computation time delay, into the state estimator and into the whole control system. Experimental results using a commercial hard drive, as well as simulation results, show that the invention's method effectively improves the hard disk drive control system stability by increasing the phase margin and gain margin. The invention includes the method of operating the servo-controller, as well as the apparatus implementing that method. The invention also includes hard disk drives containing servo-controllers implementing the method, and program systems residing in accessibly coupled memory to a computer within the servo controller implementing the method.
摘要翻译：本发明适用于至少用于硬盘驱动器的音圈电机的伺服控制器。今天，许多控制算法需要80％到90％的采样周期来完成下一个控制的计算，使计算时间延迟不再可忽略。本发明将诸如计算时间延迟的传输延迟适应到状态估计器中并进入整个控制系统。使用商业硬盘驱动器的实验结果以及仿真结果表明，本发明的方法通过增加相位裕度和增益裕度来有效提高硬盘驱动器控制系统的稳定性。本发明包括操作伺服控制器的方法以及实现该方法的装置。本发明还包括实现该方法的包含伺服控制器的硬盘驱动器，以及驻留在可访问耦合存储器中的程序系统，其中所述计算机实现该方法的伺服控制器内的计算机。

7. 发明申请

US20060171064A1 Method and apparatus for improved disk damper in a hard disk drive 失效
标题翻译：用于改进硬盘驱动器中的磁盘阻尼器的方法和装置
公开(公告)号：US20060171064A1
公开(公告)日：2006-08-03
申请号：US11357824
申请日：2006-04-17
申请人： Yun-Sik Han , Young-Hoon Kim , Hae-Sung Kwon , Hyung Lee , Hong-Taek Lim
发明人： Yun-Sik Han , Young-Hoon Kim , Hae-Sung Kwon , Hyung Lee , Hong-Taek Lim
IPC分类号： G11B17/00
CPC分类号： G11B17/038
摘要： The invention includes a disk damper containing an extended area located on the upstream side of the head stack assembly. The extended area is joined to a tail section. In the extended area, the disk damper provides a wall near the neighboring rotating disk surface that extends from the outside diameter to the inside diameter of the rotating disk surface. Experimental results have shown that this provides much more consistent dampening of disk vibrations and vibrations of a head stack assembly positioned anywhere from the inside diameter to the outside diameter. The hard disk drive including the disk damper. Using the disk damper in a hard disk drive to improve the reliability of the hard disk drive during track following. Making the hard disk drive using the disk damper, and the hard disk drive as a product of that manufacturing process.
摘要翻译：本发明包括一个盘式阻尼器，该盘式阻尼器包含位于头部堆叠组件的上游侧的延伸区域。延伸区域连接到尾部。在扩展区域中，盘式减震器在相邻的旋转盘表面附近提供了一个壁，该壁从外径延伸到旋转盘表面的内径。实验结果表明，这提供了从内径到外径位于任何地方的磁头堆叠组件的盘振动和振动的更一致的衰减。硬盘驱动器包括磁盘阻尼器。在硬盘驱动器中使用磁盘风扇，以提高跟踪期间硬盘驱动器的可靠性。使用磁盘阻尼器和硬盘驱动器作为该制造过程的产物制作硬盘驱动器。

8. 发明申请

US20060146443A1 Method and apparatus for airflow transition edges on noise dampers in a hard disk drive 审中-公开
标题翻译：用于硬盘驱动器中噪声阻尼器上的气流过渡边缘的方法和装置
公开(公告)号：US20060146443A1
公开(公告)日：2006-07-06
申请号：US11028078
申请日：2004-12-30
申请人： Joseph Chang , Gregory Tran , Yun-Sik Han , Frank Morris
发明人： Joseph Chang , Gregory Tran , Yun-Sik Han , Frank Morris
IPC分类号： G11B33/14
CPC分类号： G11B33/08 , G11B5/40 , G11B5/6005 , G11B25/043
摘要： The present invention includes apparatus and methods for disk dampers with an inlet edge and/or an outlet edge, oriented and shaped to control airflow within the hard disk drive. The inlet edge and the outlet edge reduce the airflow turbulence at the actuator assembly. This improves the Position Error Signal (PES), as the read-write head accesses a rotating disk surface. The outlet edge may preferably be curved and oriented at an oblique angle with respect to the angular rotation of the disk(s) in the hard disk drive. The outlet edge may preferably extend over a section of a sector angle. The inlet edge may preferably be oblique, which helps to slow down the overall velocity of the airflow into the disk damper. This allows the tip of the inlet edge to be positioned closer to the actuator assembly than previously possible.
摘要翻译：本发明包括具有入口边缘和/或出口边缘的盘式阻尼器的装置和方法，其定向和成形以控制硬盘驱动器内的气流。入口边缘和出口边缘减少了致动器组件处的气流湍流。当读写头访问旋转盘表面时，这改善了位置误差信号（PES）。出口边缘可以优选地弯曲并且相对于硬盘驱动器中的盘的角度旋转以倾斜角定向。出口边缘可以优选地在扇形角度的一部分上延伸。入口边缘优选地是倾斜的，这有助于减慢气流进入盘式阻尼器的整体速度。这允许入口边缘的尖端比先前可能更靠近致动器组件定位。

9. 发明授权

US06999262B2 Servo track writing for ultra-high TPI disk drive in low density medium condition 失效
标题翻译：高密度TPI磁盘驱动器在低密度介质条件下的伺服磁道写入
公开(公告)号：US06999262B2
公开(公告)日：2006-02-14
申请号：US10732999
申请日：2003-12-10
申请人： Yun-Sik Han , Seong-Woo Kang , Tho Pham , Young-Hoon Kim , Edward Aguilar , Dong-Ho Oh , Myeong-Eop Kim
发明人： Yun-Sik Han , Seong-Woo Kang , Tho Pham , Young-Hoon Kim , Edward Aguilar , Dong-Ho Oh , Myeong-Eop Kim
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B33/1486
摘要： A servo writer that writes servo information onto a disk of a hard disk drive. The servo writer can write servo information onto a disk of a hard disk drive while the disk is within an inner chamber of a housing. The rotating disk creates a flow of fluid within the inner chamber. The disk is rotated during the servo writing process. The density of a fluid medium within the inner chamber is controlled by a medium control system so that the density of the medium is less than the density of air at one atmosphere. Lowering the density decreases the amplitude of vibrational forces created by the flow of fluid. Decreasing the amplitude reduces errors in the servo writing process. The density can be reduced by pulling a vacuum within the inner chamber. The density can also be reduced by filling the inner chamber with a gas such as helium that has a lower density than air.
摘要翻译：将伺服信息写入硬盘驱动器的磁盘上的伺服写入器。伺服写入器可以在盘位于壳体的内腔内时将伺服信息写入硬盘驱动器的盘上。旋转盘在内腔内产生流体流。在伺服写入过程中，盘旋转。内室内的流体介质的密度由介质控制系统控制，使得介质的密度小于一个大气压下的空气密度。降低密度会降低由流体流产生的振动力的振幅。降低幅度会降低伺服写入过程中的误差。可以通过在内腔内拉真空来减小密度。通过用比空气密度低的诸如氦气的气体填充内室也可以减小密度。

10. 发明申请

US20050207055A1 Method and apparatus reducing off track head motion due to disk vibration in a hard disk drive through the head gimbal assembly 失效
标题翻译：方法和装置减少由于硬盘驱动器中的磁头振动通过头部万向节组件引起的轨道头运动
公开(公告)号：US20050207055A1
公开(公告)日：2005-09-22
申请号：US11126462
申请日：2005-05-10
申请人： Dong-Ho Oh , Seong-Woo Kang , Yun-Sik Han , Young-Hoon Kim , Myeong-Eop Kim , Tae-Yeon Hwang , Jae-Won Kim
发明人： Dong-Ho Oh , Seong-Woo Kang , Yun-Sik Han , Young-Hoon Kim , Myeong-Eop Kim , Tae-Yeon Hwang , Jae-Won Kim
IPC分类号： G11B21/10 , G11B5/48 , G11B5/55 , G11B5/596 , G11B21/02
CPC分类号： G11B5/4833 , G11B5/4826 , G11B5/5552 , G11B5/596
摘要： An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention. Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly.
摘要翻译：改进和独特的伺服控制器方案导致PES性能的总体改进，特别是当应用于采用本发明的TMR减小机构的硬盘驱动器时。伺服控制器在磁盘振动频率范围内取消增益，有利于提高低频干扰的抑制。当应用于具有本发明的TMR减少机制的硬盘驱动器时，这导致最低的PES统计。提供了改进的头万向节组件，减少了硬盘驱动器中的TMR（跟踪错位）。这些头万向架组件与当代头万向架组件一样机械简单，在平盘表面上支撑平行的飞行滑块，并减少由磁盘振动引起的TMR。与其他已知方法相比，其轨迹密度和转速可比较容易构建，更可靠，成本更低。改进的头万向节组件包括三组机构，当盘表面平坦时，滑块平行于盘表面移动，并且当盘表面弯曲时，将滑块径向移动到轨道。第一和第三机构以及第二和第三机构可以一起用在头部万向架组件中。

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