公开(公告)号：US20140055883A1

公开(公告)日：2014-02-27

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: G11B5/596

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方法能够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：US08363348B2

公开(公告)日：2013-01-29

申请号：US12924880

申请日：2010-10-07

Applicant: Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

Inventor： Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

IPC: G11B5/09 ,  G11B5/596

CPC classification number: G11B5/59655

Abstract: Patterned magnetic media are described in which the servo sectors include at least two PES offset segments that can be used for the position error signal (PES) and identification of local track position. The two PES offset segments deviate from the track centerline in opposite directions. The lengths of the offset PES offset segments are systematically varied in a repeating pattern to provide a unique servo signal pattern for each track in a local group of adjacent tracks. The locally unique servo sector pattern allows the servo system to use the pattern of the signals generated from the offset and non-offset segments to determine the local track position, which is similar to information provided by the low order Gray code bits in prior art designs. Therefore, the number of bits in the track ID code can be reduced.

Abstract translation: 描述了图形磁介质，其中伺服扇区包括可用于位置误差信号（PES）和识别本地轨道位置的至少两个PES偏移段。 两个PES偏移片段在相反方向偏离轨道中心线。 偏移PES偏移段的长度以重复模式系统地改变，以为本地相邻轨道组中的每个轨道提供唯一的伺服信号模式。 本地唯一的伺服扇区模式允许伺服系统使用从偏移和非偏移段产生的信号的模式来确定本地轨道位置，其类似于现有技术设计中的低阶格雷码位提供的信息 。 因此，可以减少轨道ID码中的比特数。

公开(公告)号：US20120087037A1

公开(公告)日：2012-04-12

申请号：US12924880

申请日：2010-10-07

Applicant: Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

Inventor： Toshiki Hirano ,  Jeffrey S. Lille ,  Tetsuo Semba

IPC: G11B5/596

CPC classification number: G11B5/59655

Abstract: Patterned magnetic media are described in which the servo sectors include at least two PES offset segments that can be used for the position error signal (PES) and identification of local track position. The two PES offset segments deviate from the track centerline in opposite directions. The lengths of the offset PES offset segments are systematically varied in a repeating pattern to provide a unique servo signal pattern for each track in a local group of adjacent tracks. The locally unique servo sector pattern allows the servo system to use the pattern of the signals generated from the offset and non-offset segments to determine the local track position, which is similar to information provided by the low order Gray code bits in prior art designs. Therefore, the number of bits in the track ID code can be reduced.

Abstract translation: 描述了图形磁介质，其中伺服扇区包括可用于位置误差信号（PES）和识别本地轨道位置的至少两个PES偏移段。 两个PES偏移片段在相反方向偏离轨道中心线。 偏移PES偏移段的长度以重复模式系统地改变，以为本地相邻轨道组中的每个轨道提供唯一的伺服信号模式。 本地唯一的伺服扇区模式允许伺服系统使用从偏移和非偏移段产生的信号的模式来确定本地轨道位置，其类似于现有技术设计中的低阶格雷码位提供的信息 。 因此，可以减少轨道ID码中的比特数。

公开(公告)号：US20120002314A1

公开(公告)日：2012-01-05

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: G11B27/36 ,  G11B33/14

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内部的温度; 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：US07826170B2

公开(公告)日：2010-11-02

申请号：US12212781

申请日：2008-09-18

Applicant: Tetsuo Semba

Inventor： Tetsuo Semba

IPC: G11B5/584 ,  G11B21/02 ,  G11B5/58

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：US07345841B2

公开(公告)日：2008-03-18

申请号：US11349774

申请日：2006-02-07

Applicant: Eric Gordon Baugh ,  Tetsuo Semba ,  Matthew T. White

Inventor： Eric Gordon Baugh ,  Tetsuo Semba ,  Matthew T. White

IPC: G11B21/02

CPC classification number: G11B5/5582 ,  G11B5/59622

Abstract: A magnetic recording disk drive has a disturbance sensor and a disturbance frequency identifier that are used to adjust the frequency of a peak filter as the disturbance frequency changes. The sensor and the frequency identifier are separate from the servo control loop and thus do not rely on the head position error signal (PES) to predict the disturbance frequency. The adjustable peak filter is coupled in parallel with the servo feedback controller. The peak filter modifies the open loop transfer function and the error rejection function of the servo control loop to provide a higher rejection at the identified frequency. The peak filter may be switched out of or uncoupled from the servo feedback controller during track-seeking or as desired, depending on the amplitude of the sensor signal or the amplitude of the PES.

Abstract translation: 磁记录盘驱动器具有干扰传感器和干扰频率标识符，用于随着扰动频率的变化来调整峰值滤波器的频率。 传感器和频率标识符与伺服控制环分开，因此不依赖于头位置误差信号（PES）来预测扰动频率。 可调峰值滤波器与伺服反馈控制器并联耦合。 峰值滤波器修改开环传递函数和伺服控制回路的误差抑制功能，以在识别的频率提供更高的抑制。 根据传感器信号的幅度或PES的振幅，峰值滤波器可以在跟踪寻找期间或根据需要从伺服反馈控制器切换或分离。

公开(公告)号：US20080037162A1

公开(公告)日：2008-02-14

申请号：US11835309

申请日：2007-08-07

Applicant: Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

Inventor： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

IPC: G11B5/09

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：US20070183076A1

公开(公告)日：2007-08-09

申请号：US11349774

申请日：2006-02-07

Applicant: Eric Baugh ,  Tetsuo Semba ,  Matthew White

Inventor： Eric Baugh ,  Tetsuo Semba ,  Matthew White

IPC: G11B21/02 ,  G11B5/596

CPC classification number: G11B5/5582 ,  G11B5/59622

Abstract: A magnetic recording disk drive has a disturbance sensor and a disturbance frequency identifier that are used to adjust the frequency of a peak filter as the disturbance frequency changes. The sensor and the frequency identifier are separate from the servo control loop and thus do not rely on the head position error signal (PES) to predict the disturbance frequency. The adjustable peak filter is coupled in parallel with the servo feedback controller. The peak filter modifies the open loop transfer function and the error rejection function of the servo control loop to provide a higher rejection at the identified frequency. The peak filter may be switched out of or uncoupled from the servo feedback controller during track-seeking or as desired, depending on the amplitude of the sensor signal or the amplitude of the PES.

Abstract translation: 磁记录盘驱动器具有干扰传感器和干扰频率标识符，用于随着扰动频率的变化来调整峰值滤波器的频率。 传感器和频率标识符与伺服控制环分开，因此不依赖于头位置误差信号（PES）来预测扰动频率。 可调峰值滤波器与伺服反馈控制器并联耦合。 峰值滤波器修改开环传递函数和伺服控制回路的误差抑制功能，以在识别的频率提供更高的抑制。 根据传感器信号的幅度或PES的振幅，峰值滤波器可以在跟踪寻找期间或根据需要从伺服反馈控制器切换或分离。

公开(公告)号：US20060066991A1

公开(公告)日：2006-03-30

申请号：US10956919

申请日：2004-09-30

Applicant: Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

Inventor： Toshiki Hirano ,  Tetsuo Semba ,  Matthew 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 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也可以用作电容式传感器的支撑结构。

公开(公告)号：US07012777B1

公开(公告)日：2006-03-14

申请号：US10956908

申请日：2004-09-30

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

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

IPC: G11B5/596

CPC classification number: G11B5/00 ,  G11B5/59627

Abstract: A data recording disk drive has a plurality of capacitive sensors, each sensor facing a surface of an associated disk, a capacitance sensing circuit for converting the sensed capacitance to a voltage representative of the distance between the sensor and the disk surface, and a feedforward controller that receives the voltage signal. The feedforward controller has a transfer function with gain and phase characteristics designed to match the transfer function from the out-of-plane disk vibration to the position of the read/write head while accounting for the effects of the sensor dynamics and the dynamics of the actuator. The output from the feedforward controller is combined with the output from the disk drive's servo feedback controller so that the effects of disk vibration on track misregistration of the head are removed from the control signal to the actuator.

Abstract translation: 数据记录盘驱动器具有多个电容传感器，每个传感器面对相关盘的表面，用于将检测到的电容转换为表示传感器和盘表面之间的距离的电压的电容感测电路，以及前馈控制器 接收电压信号。 前馈控制器具有传递函数，其增益和相位特性被设计成将传播函数从平面外盘振动到读/写头的位置相匹配，同时考虑到传感器动力学和动力学的影响 执行器。 来自前馈控制器的输出与磁盘驱动器的伺服反馈控制器的输出相结合，使得磁盘振动对磁头的磁道重合失调的影响从控制信号中移除到执行机构。