公开(公告)号：US20130135764A1

公开(公告)日：2013-05-30

申请号：US13306736

申请日：2011-11-29

申请人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba ,  Zvonimir Z. Bandic

发明人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba ,  Zvonimir Z. Bandic

IPC分类号： G11B27/36

CPC分类号： G11B5/59627 ,  G11B5/59694 ,  G11B20/1217 ,  G11B2020/1228 ,  G11B2020/1238 ,  G11B2220/2516

摘要： A method, apparatus and a data storage device are provided for implementing data track pitch adjustment for data written on a recordable surface of a storage device under operational vibration conditions. An operational vibration disturbance spectrum is detected during a write operation and the data track pitch is selectively adjusted based on the detected operational vibration disturbance spectrum. The adjusted track pitch information is saved and used during a read operation.

摘要翻译： 提供了一种方法，装置和数据存储装置，用于在操作的振动条件下为存储装置的可记录表面上写入的数据实现数据轨道间距调整。 在写入操作期间检测到操作的振动干扰频谱，并且基于检测到的操作振动干扰谱选择性地调整数据轨道间距。 调整后的音高信息在读取操作期间被保存和使用。

公开(公告)号：US07450339B2

公开(公告)日：2008-11-11

申请号：US11835276

申请日：2007-08-07

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B33/14

CPC分类号： G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

摘要： 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 support for disk damping plates, can also function as the support structure for the capacitive sensors.

摘要翻译： 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，例如对磁盘阻尼板的支持，也可以用作电容式传感器的支撑结构。

公开(公告)号：US20080037161A1

公开(公告)日：2008-02-14

申请号：US11835276

申请日：2007-08-07

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

IPC分类号： G11B33/14

CPC分类号： G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

摘要： 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 support for disk damping plates, can also function as the support structure for the capacitive sensors.

摘要翻译： 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，例如对磁盘阻尼板的支持，也可以用作电容式传感器的支撑结构。

公开(公告)号：US20080037155A1

公开(公告)日：2008-02-14

申请号：US11502069

申请日：2006-08-09

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B21/02 ,  G11B19/02

CPC分类号： G11B5/59627 ,  G11B5/6017

摘要： Methods and systems for reducing read/write head track misregistration are described. According to one embodiment, a first signal is received from a first capacitive sensor that faces a surface of a disk associated with a disk drive. A second signal is received from a second capacitive sensor that faces the surface of the disk. A determination is made as to whether the disk is being moved along its axis of rotation or whether the disk is tilting. Read/write head track misregistration is reduced based on the determination of whether the disk drive is being moved along an axis of rotation or whether the disk is tilting.

摘要翻译： 描述了用于减少读/写磁头轨迹重合失调的方法和系统。 根据一个实施例，从面对与磁盘驱动器相关联的盘的表面的第一电容传感器接收第一信号。 从面向盘表面的第二电容传感器接收第二信号。 确定盘是否沿其旋转轴线移动或盘是否倾斜。 基于确定磁盘驱动器是沿着旋转轴移动还是旋转的磁盘是否被读取/写入磁头轨迹重合不足。

公开(公告)号：US07292407B2

公开(公告)日：2007-11-06

申请号：US10956919

申请日：2004-09-30

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew T. White

IPC分类号： G11B33/14 ,  G11B5/012 ,  G11B17/00

CPC分类号： G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

摘要： 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.

摘要翻译： 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：US07145746B1

公开(公告)日：2006-12-05

申请号：US11279763

申请日：2006-04-14

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Tetsuo Semba

IPC分类号： G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/5582 ,  G11B5/59622

摘要： A disk drive, such as a magnetic recording hard disk drive, has a head positioning servo control system that includes an improved repetitive controller included with the conventional feedback controller for suppressing periodic disturbances. The repetitive controller includes a low-pass filter (LPF) and a time-delay memory with a time delay matched to the period of the periodic disturbance. In a digital implementation, where the head position error signal (PES) is sampled, the time delay is the time for N samples. A subsequent PES sample is summed with the time-delay input sample from N samples earlier and this summed value is input to the LPF. The output of the LPF is added to the subsequent PES sample and the added value is input to the feedback controller. The value of N is adjustable, so the repetitive controller is adaptable to changes in frequency of the periodic disturbance.

摘要翻译： 诸如磁记录硬盘驱动器的磁盘驱动器具有头定位伺服控制系统，其包括用于抑制周期性干扰的常规反馈控制器所包括的改进的重复控制器。 重复控制器包括低通滤波器（LPF）和具有与周期性干扰周期匹配的时间延迟的时间延迟存储器。 在头位置误差信号（PES）被采样的数字实现中，时间延迟是N个采样的时间。 随后的PES样本与来自N个样本的时间延迟输入样本相加，并将该求和值输入到LPF。 将LPF的输出添加到随后的PES样本中，并将附加值输入到反馈控制器。 N值可调，因此重复控制器适应周期性扰动频率的变化。

公开(公告)号：US20060066985A1

公开(公告)日：2006-03-30

申请号：US10956908

申请日：2004-09-30

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

IPC分类号： G11B5/596

CPC分类号： G11B5/00 ,  G11B5/59627

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20140055883A1

公开(公告)日：2014-02-27

申请号：US13593991

申请日：2012-08-24

申请人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba

发明人： Abhishek Dhanda ,  Toshiki Hirano ,  Tetsuo Semba

IPC分类号： G11B5/596

CPC分类号： G11B20/1252 ,  G11B5/09 ,  G11B5/5543 ,  G11B5/56 ,  G11B5/59694 ,  G11B2020/1238

摘要： 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.

摘要翻译： 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：US20080037162A1

公开(公告)日：2008-02-14

申请号：US11835309

申请日：2007-08-07

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

IPC分类号： G11B5/09

CPC分类号： G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

摘要： 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.

摘要翻译： 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：US20060066991A1

公开(公告)日：2006-03-30

申请号：US10956919

申请日：2004-09-30

申请人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

发明人： Toshiki Hirano ,  Tetsuo Semba ,  Matthew White

IPC分类号： G11B33/14

CPC分类号： G11B5/58 ,  G11B5/5582 ,  G11B5/596 ,  G11B33/08

摘要： 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.

摘要翻译： 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。