公开(公告)号：US20060023340A1

公开(公告)日：2006-02-02

申请号：US10903720

申请日：2004-07-29

申请人： Young-Hoon Kim ,  Sang Chu ,  Seong-Woo Kang ,  Dong-Ho Oh ,  Yun-Sik Han ,  Tae Hwang

发明人： Young-Hoon Kim ,  Sang Chu ,  Seong-Woo Kang ,  Dong-Ho Oh ,  Yun-Sik Han ,  Tae 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.

公开(公告)号：US20060187571A1

公开(公告)日：2006-08-24

申请号：US11397254

申请日：2006-04-03

申请人： Young-Hoon Kim ,  Sang Chu ,  Seong-Woo Kang ,  Dong-Ho Oh ,  Yun-Sik Han ,  Tae Hwang

发明人： Young-Hoon Kim ,  Sang Chu ,  Seong-Woo Kang ,  Dong-Ho Oh ,  Yun-Sik Han ,  Tae 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。

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.

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。

公开(公告)号：US06920018B2

公开(公告)日：2005-07-19

申请号：US10618524

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： G11B5/56 ,  G11B5/596 ,  G11B5/60

CPC分类号： G11B5/59627

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 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滑动滑块，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。 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。

公开(公告)号：US20050128628A1

公开(公告)日：2005-06-16

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： G11B21/10 ,  G11B5/596 ,  G11B19/02 ,  G11B21/02 ,  G11B33/14

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。

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。

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。

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。

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。