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：US07580217B2

公开(公告)日：2009-08-25

申请号：US11619176

申请日：2007-01-02

申请人： Jirou Abe ,  Gaku Ikedo ,  Tetsuo Semba

发明人： Jirou Abe ,  Gaku Ikedo ,  Tetsuo Semba

IPC分类号： G11B5/596 ,  G11B21/02

CPC分类号： G11B5/59622

摘要： A disk drive uses a hybrid analog-digital acceleration feedforward control system and method for cancellation of rotational disturbances. A rotational vibration (RV) sensor is used with an analog circuit to generate an analog feedforward signal that is summed with the analog actuator control signal from the servo control processor. The analog feedforward signal is also converted to a digital feedforward signal and input to the processor. When the actuator gain deviates from its design value, the processor retrieves the appropriate actuator gain value from a lookup table. The processor uses the actuator gain value and the digital feedforward signal to calculate a modified feedforward signal, which is a fraction of the digital feedforward signal. The processor also calculates a feedback control value from the servo positioning information and a feedback controller. The modified feedforward signal is then summed with the feedback control value to generate the digital actuator control signal, which is converted to the analog actuator control signal. If the actuator gain is at its design value, the calculated modified feedforward signal is zero so the digital feedforward signal is not used.

摘要翻译： 磁盘驱动器使用混合模拟数字加速前馈控制系统和方法来消除旋转干扰。 旋转振动（RV）传感器与模拟电路一起使用，以产生与来自伺服控制处理器的模拟致动器控制信号相加的模拟前馈信号。 模拟前馈信号也转换为数字前馈信号并输入到处理器。 当执行器增益偏离其设计值时，处理器从查找表中检索适当的执行器增益值。 处理器使用执行器增益值和数字前馈信号来计算修改的前馈信号，这是数字前馈信号的一小部分。 处理器还从伺服定位信息和反馈控制器计算反馈控制值。 然后将修改的前馈信号与反馈控制值相加以产生数字致动器控制信号，其被转换为模拟致动器控制信号。 如果执行器增益处于其设计值，则计算的修改前馈信号为零，因此不使用数字前馈信号。

公开(公告)号：US07457076B2

公开(公告)日：2008-11-25

申请号：US11335849

申请日：2006-01-18

申请人： Tetsuo Semba ,  Hiroshi Uchida

发明人： Tetsuo Semba ,  Hiroshi Uchida

IPC分类号： G11B5/596

CPC分类号： G11B5/5547 ,  G11B5/5586

摘要： In seek control for a head of a rotary recorder/reproducer, the seek time is reduced with noise reduced while utilizing a driving force of an actuator effectively. In one embodiment, when a microprocessor generates a control signal for a drive current given to an actuator for head seek, a signal generator generates a prespecified acceleration allowing for the allowable maximum acceleration when the actuator is accelerated, a prespecified deceleration signal allowing for the allowable maximum deceleration when the actuator is decelerated, and a zero level signal when the actuator is settled. Switching from deceleration to settling is performed at a point of time computed by the microprocessor as a time point when settling is to be started so that the head may reach a target position within the shortest period of time.

摘要翻译： 在用于旋转记录器/再现器的头部的寻道控制中，在有效地利用致动器的驱动力的同时，寻求时间减少，噪声降低。 在一个实施例中，当微处理器产生用于头部寻道的致动器的驱动电流的控制信号时，信号发生器产生预先指定的加速度，允许执行器被加速时允许的最大加速度，预定的减速信号允许允许 执行器减速时的最大减速度，执行机构稳定时为零电平信号。 从减速到稳定的切换是在由微处理器计算的时间点作为开始建立的时间点执行的，以便头部可以在最短时间内到达目标位置。

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：US07206162B2

公开(公告)日：2007-04-17

申请号：US11000680

申请日：2004-11-30

申请人： Tetsuo Semba ,  Matthew White ,  Hiroshi Uchida

发明人： Tetsuo Semba ,  Matthew White ,  Hiroshi Uchida

IPC分类号： G11B5/596 ,  G11B5/58 ,  G11B5/55

CPC分类号： G11B5/5547

摘要： Embodiments of the present invention provide a method and a system for generating optimal feedforward signal for the seek control to suppress the RTV (Random Transient Vibrations) and the seek acoustic noise. One aspect is directed to a method of providing a revised feedforward signal using an adaptive filter in a feedforward control system for controlling an actuator to move a head to seek a track and settle on the track of a disk in a disk drive apparatus. The method comprises performing a seek operation of the head using an initial feedforward signal; obtaining an error signal at settling after performing the seek operation; determining filter characteristics of the adaptive filter to minimize the error signal; and implementing the adaptive filter having the determined filter characteristics in the feedforward control system to produce a revised feedforward signal for controlling the actuator for moving the head in the disk drive apparatus.

摘要翻译： 本发明的实施例提供了一种用于产生用于搜索控制以抑制RTV（随机瞬态振荡）和寻呼声学噪声的最佳前馈信号的方法和系统。 一个方面涉及一种在前馈控制系统中使用自适应滤波器来提供修正的前馈信号的方法，用于控制致动器移动磁头以寻找磁道并将其稳定在盘驱动装置中的盘的轨道上。 该方法包括使用初始前馈信号来执行头的寻道操作; 在执行寻道操作之后获得沉降中的误差信号; 确定自适应滤波器的滤波器特性以最小化误差信号; 并且在前馈控制系统中实现具有确定的滤波器特性的自适应滤波器，以产生用于控制用于在盘驱动装置中移动磁头的致动器的修正前馈信号。

公开(公告)号：US07177113B1

公开(公告)日：2007-02-13

申请号：US11196874

申请日：2005-08-03

申请人： Tetsuo Semba ,  Matthew T. White ,  Kevin I. Tzou

发明人： Tetsuo Semba ,  Matthew T. White ,  Kevin I. Tzou

IPC分类号： G11B5/596

CPC分类号： G11B5/5582

摘要： A magnetic recording disk drive with rotational vibration (RV) cancellation uses the position error signal (PES) and the signal from a RV sensor to determine when to enable and disable RV cancellation. An RV feedforward compensation signal to be summed with the VCM control signal is “switchable”, meaning that it can be enabled or disabled by the disk drive servo control processor. The determination to enable or disable is made from a comparison of the PES with a threshold PES, which may be an estimate of the off-track position of the head calculated from the RV sensor signal. The estimated off-track is compared to the absolute value of the actual or measured PES. If the estimated off-track is smaller than the actual PES, then the state of the RV cancellation is switched, i.e., if it is enabled it is disabled and if it is disabled it is enabled.

摘要翻译： 具有旋转振动（RV）消除的磁记录盘驱动器使用位置误差信号（PES）和来自RV传感器的信号来确定何时启用和禁用RV取消。 与VCM控制信号相加的RV前馈补偿信号是“可切换的”，这意味着它可以由磁盘驱动器伺服控制处理器启用或禁用。 通过PES与阈值PES的比较来确定启用或禁用，阈值PES可以是从RV传感器信号计算出的头部的偏离轨迹位置的估计。 将估计的偏离轨道与实际或测量的PES的绝对值进行比较。 如果估计的偏离轨迹小于实际的PES，则RV切换的状态被切换，即如果启用，则它被禁用，并且如果被禁用，则其被使能。

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。