公开(公告)号：US06771458B2

公开(公告)日：2004-08-03

申请号：US10100960

申请日：2002-03-18

申请人： Seong Hoon Kim ,  Tae Yeon Hwang ,  Tho Pham

发明人： Seong Hoon Kim ,  Tae Yeon Hwang ,  Tho Pham

IPC分类号： G11B3314

CPC分类号： G11B33/08

摘要： The inventors have discovered that aerodynamic forces contribute to disk fluttering. If the flow of air about these disk surfaces is unstable, the resulting aerodynamic forces can mechanically excite the disk surfaces, causing fluttering. The invention includes media enclosures constraining such aerodynamic effects, methods of making disk drives with these enclosures, the disk drives. This includes disk drives of at most 13 millimeters in height.

摘要翻译： 本发明人已经发现，空气动力引起磁盘振动。 如果这些盘表面周围的空气流不稳定，则产生的空气动力可以机械地激励磁盘表面，引起振动。 本发明包括限制这种空气动力效应的介质外壳，用这些外壳制造磁盘驱动器的方法，磁盘驱动器。 这包括高达13毫米高的磁盘驱动器。

公开(公告)号：US07031105B2

公开(公告)日：2006-04-18

申请号：US10772959

申请日：2004-02-04

申请人： Seong Hoon Kim ,  Tae Yeon Hwang ,  Tho Pham

发明人： Seong Hoon Kim ,  Tae Yeon Hwang ,  Tho Pham

IPC分类号： G11B33/14

CPC分类号： G11B33/08

摘要： The inventors have discovered that aerodynamic forces contribute to disk fluttering. If the flow of air about these disk surfaces is unstable, the resulting aerodynamic forces can mechanically excite the disk surfaces, causing fluttering. The invention includes media enclosures constraining such aerodynamic effects, methods of making disk drives with these enclosures, the disk drives. This includes disk drives of at most 13 millimeters in height.

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：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.