公开(公告)号：US07010653B2

公开(公告)日：2006-03-07

申请号：US10405523

申请日：2003-04-02

Applicant: Hiroshi Uchida ,  Tetsuo Semba ,  Tomoyuki Oyama

Inventor： Hiroshi Uchida ,  Tetsuo Semba ,  Tomoyuki Oyama

IPC: G06F13/14

CPC classification number: G06F3/0659 ,  G06F1/32 ,  G06F3/0625 ,  G06F3/0676 ,  Y02D10/154

Abstract: A method and system to provide a command queue re-ordering method that can make the power save and reduction in acoustic noise. The command queue re-ordering method involves calculating the value of an evaluation function, Ev=A×T+(1−A)×Fun(L) (A is any number from 0 to 1, T is a latency required to execute a write command and/or read command, and Fun(L) is an evaluation function with a seek distance L) for the write command and/or read command, and selecting the write command and/or read command having the minimum value as a next command to be execute.

公开(公告)号：US06614613B1

公开(公告)日：2003-09-02

申请号：US09526261

申请日：2000-03-16

Applicant: Fu-Ying Huang ,  Naoyuki Kagami ,  Tetsuo Semba ,  Eiji Soga ,  Shingo Tsuda

Inventor： Fu-Ying Huang ,  Naoyuki Kagami ,  Tetsuo Semba ,  Eiji Soga ,  Shingo Tsuda

IPC: G11B2110

CPC classification number: G05D19/02 ,  G11B5/10 ,  G11B5/5582 ,  G11B5/59627

Abstract: An active control mechanism and method for stabilizing a servo-controlled actuator system such as an actuator system in a data recording disk drive by compensating the vibrational modes of the actuator's arm assembly. The control mechanism has a sensing arrangement which can include one or more individual sensors attached to the actuator at locations where they generate signals in phase with the vibrational modes, and especially with all the low-frequency major vibrational modes, of the arm assembly. A control mechanism derives from the signals an adjustment signal consisting of three corrective terms—a stiffening correction, an active damping correction, and an inertia correction by a phase correction. Furthermore, high-frequency out-of-phase modes can be stabilized by appropriately shifting the phase of the signals. The adjustment signal is used in the feedback control loop to stabilize the actuator system.

Abstract translation: 一种主动控制机构和方法，用于通过补偿致动器臂组件的振动模式来稳定伺服控制致动器系统，例如数据记录盘驱动器中的致动器系统。 控制机构具有感测装置，其可以包括一个或多个单独的传感器，其附接到致动器的位置，在那里它们与臂组件的振动模式，特别是与所有低频主要振动模式相同地产生信号。 控制机构从信号中获得由三个校正项组成的调整信号 - 加强校正，主动阻尼校正和通过相位校正的惯性校正。 此外，可以通过适当地移位信号的相位来稳定高频异相模式。 调节信号用于反馈控制回路以稳定执行器系统。

公开(公告)号：US06219196B1

公开(公告)日：2001-04-17

申请号：US09153199

申请日：1998-09-14

Applicant: Tetsuo Semba ,  Naoyuki Kagami ,  Akira Tokizono

Inventor： Tetsuo Semba ,  Naoyuki Kagami ,  Akira Tokizono

IPC: G11B2102

CPC classification number: G11B5/596

Abstract: The present invention teaches the realization of a stable feedback control by selecting an optimal notch filter in an apparatus, such as a hard disk drive, that employs a positioning apparatus, such as an actuator, for positioning an object. The present invention further teaches the derivation of a frequency characteristic of a control loop excluding a notch filter by employing a method that does not damage a positioning apparatus. The present invention further teaches the method of adjusting a notch filter in accordance with a change of the resonant frequency of an actuator caused by the temperature fluctuations to prevent any deterioration of a feedback control performance.

Abstract translation: 本发明教导了通过在诸如硬盘驱动器的装置中选择最佳陷波滤波器来实现稳定的反馈控制，该设备采用诸如致动器的定位装置来定位物体。 本发明还通过采用不损坏定位装置的方法来教导除了陷波滤波器之外的控制回路的频率特性的推导。 本发明进一步教导了根据由温度波动引起的致动器的谐振频率的变化来调整陷波滤波器的方法，以防止反馈控制性能的任何劣化。

公开(公告)号：US08953266B2

公开(公告)日：2015-02-10

申请号：US13593991

申请日：2012-08-24

Applicant: Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba

Inventor： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba

IPC: G11B5/54

CPC classification number: G11B20/1252 ,  G11B5/09 ,  G11B5/5543 ,  G11B5/56 ,  G11B5/59694 ,  G11B2020/1238

Abstract: A data storage device with improved data storage densities, coupled with lower hard error and write-inhibit events is described. A feed-forward write inhibit (FFWI) method enables data tracks to be written more densely. Alternatively, the FFWI method may reduce the hard error and write inhibit events to improve data storage performance. A concept of virtual tracks enables the FFWI method to be applied to the writing of circular data tracks with non-circular servo tracks, or to the writing of non-circular data tracks with PES data from circular servo tracks—in both cases, improvements to performance and/or storage densities are enabled. The FFWI method may also be applied to the case of both non-circular servo and data tracks.

Abstract translation: 描述了具有改进的数据存储密度以及更低的硬错误和禁止写入事件的数据存储设备。 前馈写禁止（FFWI）方法使数据轨道更加密集地写入。 或者，FFWI方法可以减少硬错误和写禁止事件以提高数据存储性能。 虚拟轨道的概念使得FFWI方法可以应用于用非圆形伺服轨迹写入圆形数据轨道，或者用于从圆形伺服轨迹写入具有PES数据的非圆形数据轨迹 - 在这两种情况下，改进 性能和/或存储密度启用。 FFWI方法也可以应用于非圆形伺服和数据轨道的情况。

公开(公告)号：US08699165B2

公开(公告)日：2014-04-15

申请号：US12827752

申请日：2010-06-30

Applicant: Lidu Huang ,  Fu-Ying Huang ,  Tetsuo Semba

Inventor： Lidu Huang ,  Fu-Ying Huang ,  Tetsuo Semba

IPC: G11B5/596

CPC classification number: G11B5/59627 ,  G11B5/5565 ,  G11B33/144

Abstract: A HDD comprising a temperature sensor disposed inside the HDD configured to periodically measure temperature inside of said hard disk drive; a magnetic disk; a read head; a write head; memory for storing RWO data. The RWO data is a function of a distance between the read head and the write head. The HDD also includes a RWO data adjustor configured to adjust the RWO data in response to a change in temperature of the HDD to compensate for a change in the distance between the read head and the write head based on the change in temperature.

Abstract translation: 一种HDD，包括设置在所述HDD内部的温度传感器，所述温度传感器被配置为周期性地测量所述硬盘驱动器 磁盘 读头; 写头; 用于存储RWO数据的存储器。 RWO数据是读取头和写入头之间的距离的函数。 HDD还包括RWO数据调整器，其被配置为响应于HDD的温度变化来调整RWO数据，以补偿基于温度变化的读取头和写入头之间的距离的变化。

公开(公告)号：US20130083420A1

公开(公告)日：2013-04-04

申请号：US13249041

申请日：2011-09-29

Applicant: Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

Inventor： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

IPC: G11B15/52 ,  G11B5/82

CPC classification number: G11B5/59688 ,  G11B5/59655

Abstract: A magnetic data storage system having a magnetic disk having burst patterns for providing a position error signal (PES) wherein each magnetic burst pattern is offset from an adjacent burst pattern by ¼ track pitch. All of the magnetic bits of the burst patterns can be unipolar magnetized, and the bits of each burst pattern can be aligned with one another in radial and circumferential direction. The magnetic media can be a bit patterned media wherein the magnetic bits of the burst patterns are magnetically isolated portions separated by non-magnetic spaces or non-magnetic material.

Abstract translation: 一种磁数据存储系统，具有具有用于提供位置误差信号（PES）的脉冲串模式的磁盘，其中每个磁脉冲串模式从相邻脉冲串模式偏移1/4声道间距。 突发图案的所有磁位可以是单极磁化的，并且每个突发图案的位可以在径向和圆周方向上彼此对准。 磁介质可以是位图形介质，其中突发图案的磁位是被非磁性空间或非磁性材料隔开的磁隔离部分。

公开(公告)号：US20100067342A1

公开(公告)日：2010-03-18

申请号：US12212781

申请日：2008-09-18

Applicant: Tetsuo SEMBA

Inventor： Tetsuo SEMBA

IPC: G11B20/18

CPC classification number: G11B5/5526 ,  G11B5/5547

Abstract: A hard disk drive control module has a feed-forward signal input port communicatively coupled with a reference model. The hard disk drive control module has a tracking error signal input port communicatively coupled with a magnetic transducer of the hard disk drive. The hard disk drive control module has an error calculator module configured for determining a difference between an estimated tracking error signal in response to a first feed-forward signal and an actual tracking error signal of the magnetic transducer in response to the first feed-forward signal. The hard disk drive control module has a feed-forward signal adjuster module configured for adjusting a gain and a phase for a second feed-forward signal based on the difference between the estimated tracking error signal in response to the first feed-forward signal and the actual tracking error signal of the magnetic transducer. The hard disk drive control module has a feed-forward signal adjustment output port communicatively coupled to the second feed-forward signal.

Abstract translation: 硬盘驱动器控制模块具有与参考模型通信耦合的前馈信号输入端口。 硬盘驱动器控制模块具有通信地与硬盘驱动器的磁换能器耦合的跟踪误差信号输入端口。 硬盘驱动器控制模块具有错误计算器模块，其被配置为响应于第一前馈信号确定响应于第一前馈信号的估计的跟踪误差信号和磁换能器的实际跟踪误差信号之间的差异 。 硬盘驱动器控制模块具有前馈信号调整器模块，其被配置为基于响应于第一前馈信号的估计跟踪误差信号与第一前馈信号之间的差异来调整用于第二前馈信号的增益和相位 磁传感器的实际跟踪误差信号。 硬盘驱动器控制模块具有通信地耦合到第二前馈信号的前馈信号调整输出端口。

公开(公告)号：US07499243B2

公开(公告)日：2009-03-03

申请号：US11835309

申请日：2007-08-07

Applicant: Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

Inventor： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

IPC: G11B33/14

CPC classification number: G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

Abstract: A data recording disk drive has one or more capacitive sensors for sensing out-of-plane vibration of the disk or disks. The sensors are attached to a support structure that is attached to the disk drive housing. Each sensor is associated with a disk and faces a surface of the disk near the outer perimeter of the disk and close to the recording head. The support structure can be made of a metal or a high-strength plastic and can be a separate structure mounted to the housing, or integrated as part of the single-piece housing casting. If it is metallic, as would be the case if it were integrated with the housing, then layers of insulating material separate the sensors from the support structure. A support structure that serves other functions in the disk drive, such as a support for air dams that extend between the disks, can also function as the support structure for the capacitive sensors.

Abstract translation: 数据记录磁盘驱动器具有用于感测盘或盘的平面外振动的一个或多个电容传感器。 传感器连接到附接到磁盘驱动器外壳的支撑结构。 每个传感器与磁盘相关联并且面对靠近盘的外周边的盘的表面并且靠近记录头。 支撑结构可以由金属或高强度塑料制成，并且可以是安装到壳体的单独结构，或者作为单件式外壳铸件的一部分集成。 如果是金属的，如果将其与外壳结合在一起，则绝缘材料层将传感器与支撑结构分开。 用于磁盘驱动器中的其他功能的支撑结构（例如在盘之间延伸的气坝的支撑）也可以用作电容式传感器的支撑结构。

公开(公告)号：US07486470B1

公开(公告)日：2009-02-03

申请号：US11982283

申请日：2007-10-31

Applicant: Tetsuo Semba

Inventor： Tetsuo Semba

IPC: G11B5/58

CPC classification number: G11B5/5565

Abstract: A method of reducing the effect of vibrations associated with seek operations is disclosed. A feedforward filter is adjusted. A cancellation signal is then generated utilizing an adjusted feedforward filter, wherein the cancellation signal models a resonance of a vibration mode. The cancellation signal is provided at an actuator control signal, thereby inducing a force applied to an actuator such that the force holds the actuator at a track center position while vibrations occur during hard disk drive operations.

Abstract translation: 公开了一种降低与寻道操作相关的振动效果的方法。 调整前馈滤镜。 然后使用经调整的前馈滤波器产生消除信号，其中消除信号模拟振动模式的谐振。 消除信号被设置在致动器控制信号处，从而引起施加到致动器的力，使得在硬盘驱动操作期间发生振动时，该力将致动器保持在轨道中心位置。

公开(公告)号：US07486469B1

公开(公告)日：2009-02-03

申请号：US11981929

申请日：2007-10-31

Applicant: Tetsuo Semba

Inventor： Tetsuo Semba

IPC: G11B21/02

CPC classification number: G11B5/5547

Abstract: A method of minimizing a mechanical mode excitation is disclosed. A seed position trajectory is generated utilizing a third order time polynomial, wherein the third order time polynomial is segmented for constant velocity, and deceleration. A reference position is generated by applying a first infinite impulse response filter to the seed position trajectory. A reference acceleration is then generated by applying a second infinite impulse response filter to the reference position. Then, the reference position and the reference acceleration are fed forward to a servo loop such that an actuator follows a desired seek trajectory, thereby reducing a position error signal at the seek settling.

Abstract translation: 公开了一种使机械模式激励最小化的方法。 使用三阶时间多项式生成种子位置轨迹，其中三阶时间多项式被分段为恒定速度和减速度。 通过将第一无限脉冲响应滤波器应用于种子位置轨迹来产生参考位置。 然后通过将第二无限脉冲响应滤波器应用于参考位置来产生参考加速度。 然后，将参考位置和参考加速度馈送到伺服回路，使得致动器遵循期望的寻道轨迹，从而减少寻道稳定时的位置误差信号。