公开(公告)号：US6151183A

公开(公告)日：2000-11-21

申请号：US79876

申请日：1998-05-15

申请人： Kenja Ogasawara ,  Fuminori Sai ,  Shinji Ueno ,  Isao Yoneda

发明人： Kenja Ogasawara ,  Fuminori Sai ,  Shinji Ueno ,  Isao Yoneda

IPC分类号： G11B5/02 ,  G11B5/60 ,  G11B21/08 ,  G11B21/12 ,  G11B21/21 ,  G11B23/50 ,  G11B21/02

CPC分类号： G11B21/21 ,  G11B21/083 ,  G11B5/6011

摘要： The invention relates to a magnetic recording device which can be used at a reduced atmospheric pressure without having the head/slider assembly stick to the disk. A method of the present invention for controlling the operation of a disk drive device in reduced atmospheric pressure where a read/write head mounted on a head support arm flies above the surface of a rotating recording disk. The head support arm is moved along a radial direction of the recording disk to position the read/write head to one of cylinder positions of the recording disk. The method comprises steps of (i) detecting a value of the reduced atmospheric pressure during a power on reset period before a read/write period, (ii) storing information indicating whether the detected value of atmospheric pressure is lower than a threshold value, and (iii) accessing, during the read/write period, the stored information to determine whether an operation for lowering a flying height of the read/write head to a height which is lower than a height for the read/write operation should be inhibited.

摘要翻译： 本发明涉及一种磁记录装置，其可以在降低大气压的情况下使用，而不会使磁头/滑块组件粘到磁盘上。 本发明的方法用于控制磁盘驱动装置在降低的大气压下的操作，其中安装在头部支撑臂上的读/写头在旋转记录盘的表面上方飞行。 头支撑臂沿着记录盘的径向方向移动，以将读/写头定位到记录盘的圆柱体位置之一。 该方法包括以下步骤：（i）在读/写周期之前的上电复位期间检测降低的大气压值，（ii）存储指示检测到的大气压值是否低于阈值的信息，以及 （iii）在读/写周期期间访问所存储的信息，以确定是否应禁止将读/写头的飞行高度降低到低于读/写操作的高度的高度。

公开(公告)号：US06236527B1

公开(公告)日：2001-05-22

申请号：US09103758

申请日：1998-06-24

申请人： Hiroshi Uchiike ,  Kenji Ogasawara ,  Yoshiro Amano ,  Masahiro Shimizu ,  Shusuke Kurihara ,  Kazunari Tsuchimto ,  Nobuyuki Kitazaki ,  Shinji Ueno ,  Isao Yoneda ,  Yuji Yokoe ,  Fuminori Sai

发明人： Hiroshi Uchiike ,  Kenji Ogasawara ,  Yoshiro Amano ,  Masahiro Shimizu ,  Shusuke Kurihara ,  Kazunari Tsuchimto ,  Nobuyuki Kitazaki ,  Shinji Ueno ,  Isao Yoneda ,  Yuji Yokoe ,  Fuminori Sai

IPC分类号： G11B2102

CPC分类号： G11B19/04 ,  G11B5/54 ,  G11B21/12

摘要： A disk drive with means to prevent accidental landing of a head/slider on the disk surface is described. In one embodiment a shock sensor is provided to sense external shocks received by the mechanism. During loading (positioning) of the actuator bearing the head/slider over the disk, if a shock is sensed, loading is stopped and an immediate unloading is performed to return the actuator to the withdrawn position. In another embodiment the unload operation is performed when the rotational speed of the disk is changed. In another embodiment the unload operation is performed when the rotational speed of the disk drops below a threshold. A circuit and method for detecting when the rotational speed of the disk drops below a threshold is also provided. The unloading in the various embodiments may be performed using velocity control or without velocity control.

摘要翻译： 描述了具有防止头/滑块在盘表面上意外着落的装置的磁盘驱动器。 在一个实施例中，提供了一种震动传感器来感测由机构接收的外部冲击。 在将头/滑块轴承到盘上的执行器的装载（定位）期间，如果感测到冲击，则停止加载，并立即执行卸载以将执行器返回到撤回位置。 在另一个实施例中，当盘的旋转速度改变时执行卸载操作。 在另一个实施例中，当盘的转速下降到阈值以下时，执行卸载操作。 还提供了一种用于检测盘的转速何时下降到阈值以下的电路和方法。 各种实施例中的卸载可以使用速度控制或无速度控制来执行。

公开(公告)号：US06229663B1

公开(公告)日：2001-05-08

申请号：US09102971

申请日：1998-06-22

申请人： Isao Yoneda ,  Hiroshi Uchiike ,  Shinji Ueno ,  Kenji Ogasawara ,  Yoshihiko Aoki ,  Fuminori Sai

发明人： Isao Yoneda ,  Hiroshi Uchiike ,  Shinji Ueno ,  Kenji Ogasawara ,  Yoshihiko Aoki ,  Fuminori Sai

IPC分类号： G11B2112

CPC分类号： G11B19/28 ,  G11B5/54 ,  G11B19/04 ,  G11B21/12

摘要： The present invention provides a disk drive, a loading/unloading apparatus, and a method for controlling the apparatus, capable of improving the reliability of data by performing stable speed control. A disk drive comprises a VCM spindle driver for rotating a disk, a magnetic head, an actuator mechanism for moving a head slider having the magnetic head to a position above the surface of the magnetic disk and an unloaded position, a ramp block, and a CPU/HDC for performing the speed control of an actuator and the calibration control for detecting the offset and dynamic range of an AD converter before the speed control and controlling the operation for reading or writing data from or into the disk, which increases a rectangular current value to be applied to a voice coil while successively changing codes, measures an offset in accordance with the AD converter value for each current value, and moreover measures a dynamic range by deciding a nonlinear area when the difference between the expected value and measured value of the AD converter becomes a predetermined value or more.

摘要翻译： 本发明提供一种磁盘驱动器，装载/卸载装置以及用于控制装置的方法，能够通过执行稳定的速度控制来提高数据的可靠性。 磁盘驱动器包括用于旋转磁盘的VCM主轴驱动器，磁头，用于将具有磁头的磁头滑块移动到磁盘表面上方的位置的致动机构，以及卸载位置，斜坡块和 用于执行致动器的速度控制的CPU / HDC和用于在速度控制之前检测AD转换器的偏移和动态范围的校准控制，并且控制用于从盘读取或写入数据的操作，这增加了矩形电流 在连续更改代码的同时应用于音圈的值，根据每个当前值的AD转换器值测量偏移量，并且当预期值和测量值之间的差值决定非线性区域时，测量动态范围 AD转换器变为预定值以上。

公开(公告)号：US6108157A

公开(公告)日：2000-08-22

申请号：US105901

申请日：1998-06-26

申请人： Isao Yoneda ,  Hiroshi Uchiike ,  Shinji Ueno ,  Kenji Ogasawara

发明人： Isao Yoneda ,  Hiroshi Uchiike ,  Shinji Ueno ,  Kenji Ogasawara

IPC分类号： G11B21/02 ,  G11B5/40 ,  G11B5/54 ,  G11B19/04 ,  G11B21/12

CPC分类号： G11B5/54 ,  G11B21/12 ,  G11B19/04 ,  G11B5/40

摘要： The invention relates to a head mechanism control apparatus for magnetic recording device which ensures that the transducer head has been unloaded in a head unloading operation. A head slider having a transducer head is mounted on a head arm and is unloaded from the disk by the swinging of the head arm. The retract position is at the limit portion of the swingable range of the head arm. When the head slider is successfully unloaded to the retract position, a drive force applied to the head arm in the unload direction causes little movement of the head arm. After an unloading is performed, a position check drive force is applied to the head arm and the moving speed of the head slider is detected. Based on the moving speed, it is judged whether the head slider has been unloaded to the retract position. If the head slider has not been unloaded to the retract position, re-unloading is performed for moving the head slider to the retract position.

摘要翻译： 本发明涉及一种用于磁记录装置的磁头机构控制装置，其确保在磁头卸载操作中已经卸载了传感器头。 具有换能器头的头部滑块安装在头臂上，并通过头臂的摆动从盘上卸载。 缩回位置在头臂的摆动范围的极限部分。 当头滑块成功地卸载到缩回位置时，在卸载方向上施加到头臂的驱动力导致头臂几乎没有移动。 在执行卸载之后，向头臂施加位置检查驱动力，并且检测磁头滑块的移动速度。 基于移动速度，判断磁头滑块是否卸载到缩回位置。 如果磁头滑块未卸载到缩回位置，则执行重新卸载以将磁头滑块移动到缩回位置。

公开(公告)号：US20100142082A1

公开(公告)日：2010-06-10

申请号：US12631729

申请日：2009-12-04

申请人： Chikako Sakagami ,  Kazuhisa Shishida ,  Isao Yoneda ,  Kazuaki Usui ,  Hiroshi Uchida ,  Takeshi Saito ,  Kenji Tomida

发明人： Chikako Sakagami ,  Kazuhisa Shishida ,  Isao Yoneda ,  Kazuaki Usui ,  Hiroshi Uchida ,  Takeshi Saito ,  Kenji Tomida

IPC分类号： G11B21/02

CPC分类号： G11B5/5582 ,  G11B5/596 ,  G11B5/59622

摘要： A disk drive. The disk drive includes a head, a moving mechanism, a first peak filter, an adaptive peak filter, and a filter controller. The head is configured to read servo data on a disk at sampling frequency. The moving mechanism is configured to move the head in proximity with a recording surface of the disk. The first peak filter has a fixed peak frequency and a variable gain, and is configured to be inserted into a servo loop. The servo loop is configured to position the head with position error signals between servo data read by the head and a target position. The adaptive peak filter has a variable peak frequency and a variable gain, and is configured to be inserted into the servo loop. The filter controller is configured to control the gain of the adaptive peak filter according to the gain of the first peak filter.

摘要翻译： 磁盘驱动器 磁盘驱动器包括磁头，移动机构，第一峰值滤波器，自适应峰值滤波器和滤波器控制器。 磁头被配置为以采样频率读取磁盘上的伺服数据。 移动机构被配置为使磁头靠近磁盘的记录表面移动。 第一峰值滤波器具有固定的峰值频率和可变增益，并被配置为插入到伺服环路中。 伺服回路被配置为在头部读取的伺服数据与目标位置之间定位头部位置误差信号。 自适应峰值滤波器具有可变的峰值频率和可变增益，并被配置为插入到伺服环路中。 滤波器控制器被配置为根据第一峰值滤波器的增益来控制自适应峰值滤波器的增益。

公开(公告)号：US07724457B2

公开(公告)日：2010-05-25

申请号：US11201673

申请日：2005-08-10

申请人： Hien Dang ,  Isao Yoneda ,  Tetsuo Ueda ,  Yuzo Nakagawa ,  Sri M. Sri-Jayantha

发明人： Hien Dang ,  Isao Yoneda ,  Tetsuo Ueda ,  Yuzo Nakagawa ,  Sri M. Sri-Jayantha

IPC分类号： G11B5/09

CPC分类号： G11B5/59627 ,  G11B5/5582 ,  G11B5/596 ,  G11B25/043

摘要： A method (and structure) senses a rotational vibration of a disk drive. The disk drive includes a rotating disk. The disk includes a plurality of reference bits across a surface thereof. The method (and structure) includes detecting the reference bits across a pattern on the rotating disk, and analyzing a time interval between adjacent ones of the reference bits.

摘要翻译： 方法（和结构）感测磁盘驱动器的旋转振动。 磁盘驱动器包括旋转盘。 盘包括跨越其表面的多个参考位。 方法（和结构）包括检测旋转盘上的图案上的参考位，以及分析相邻参考位之间的时间间隔。

公开(公告)号：US07619849B2

公开(公告)日：2009-11-17

申请号：US11796228

申请日：2007-04-26

申请人： Hiroshi Uchida ,  Isao Yoneda ,  Hideki Ohzeki

发明人： Hiroshi Uchida ,  Isao Yoneda ,  Hideki Ohzeki

IPC分类号： G11B5/596

CPC分类号： G11B5/5526

摘要： Embodiments in accordance with the present invention provide a magnetic disk drive with reduced noise during seek operation without causing any delay in control response. According to one embodiment of the present invention, a control circuit of a magnetic disk drive controls the drive power supplied to a voice coil motor during a seek operation adapted to move a magnetic head over a target track formed on a magnetic disk so as to bring the travel speed of the magnetic head close to a predetermined target speed. The control circuit determines a provisional current according to the difference between the predetermined target speed and an actual travel speed in an acceleration zone adapted to accelerate the magnetic head to the predetermined target speed. If the provisional current exceeds a limit specified in relation to an elapsed time from the start of acceleration, the control circuit sets the limit as the current of the drive power supplied to the voice coil motor to control the motor.

摘要翻译： 根据本发明的实施例提供一种在寻道操作期间具有降低的噪声的磁盘驱动器，而不会导致控制响应的任何延迟。 根据本发明的一个实施例，磁盘驱动器的控制电路在搜索操作期间控制提供给音圈电机的驱动电力，以便将磁头移动到形成在磁盘上的目标磁道上，以便带动 磁头的行进速度接近预定的目标速度。 控制电路根据预定目标速度与适于将磁头加速到预定目标速度的加速区域中的实际行驶速度之间的差异来确定临时电流。 如果临时电流超过关于从加速开始起的经过时间规定的限制，则控制电路将限制设定为作为提供给音圈电动机的驱动电力的电流以控制电动机。

公开(公告)号：US20050185320A1

公开(公告)日：2005-08-25

申请号：US11063487

申请日：2005-02-22

申请人： Tetsuo Ueda ,  Isao Yoneda ,  Hideki Ohzeki ,  Naoyuki Minami

发明人： Tetsuo Ueda ,  Isao Yoneda ,  Hideki Ohzeki ,  Naoyuki Minami

IPC分类号： G11B20/10 ,  G11B5/596 ,  G11B21/08

CPC分类号： G11B5/596

摘要： Embodiments of the invention provide control of a disk data storage device to prevent off-track writing. In one embodiment, the SA acquires the CYLIDs and ADC Values generated from the SERVO SIGNALs acquired previously, and generates DACOUT which defines a driving current of the VCM driver. The SA monitors the DACOUT generated and determines whether the DACOUT is within a predefined range. If the DACOUT is outside the predefined range, data writing is inhibited. By monitoring the DACOUT, it is possible for the VCM driver to detect supply of an overcurrent to the VCM driver 210 beforehand, and off-track writing can thus be prevented.

摘要翻译： 本发明的实施例提供了一种磁盘数据存储设备的控制以防止偏离写入。 在一个实施例中，SA获取从先前获得的SERVO信号产生的CYLID和ADC值，并产生定义VCM驱动器的驱动电流的DACOUT。 SA监视生成的DACOUT，并确定DACOUT是否在预定义的范围内。 如果DACOUT超出预定范围，则禁止数据写入。 通过监视DACOUT，VCM驱动器可以预先检测到VCM驱动器210的过电流供应，从而可以防止偏离写入。

公开(公告)号：US06898046B2

公开(公告)日：2005-05-24

申请号：US10153684

申请日：2002-05-24

申请人： Sri M. Sri-Jayantha ,  Hien Dang ,  Arun Sharma ,  Isao Yoneda

发明人： Sri M. Sri-Jayantha ,  Hien Dang ,  Arun Sharma ,  Isao Yoneda

IPC分类号： G11B21/10 ,  G11B5/55 ,  G11B5/596 ,  G11B25/04

CPC分类号： G11B5/5582 ,  G11B5/596 ,  G11B5/59627 ,  G11B25/043

摘要： A disk drive (HDD) (and method) subject to linear and rotational vibration, includes an independent sensing unit for sensing a rotational velocity component of the rotational vibration in a predetermined frequency range, and an optimal filter combination for receiving an output from the sensing unit.

摘要翻译： 受到线性和旋转振动的磁盘驱动器（和方法）包括用于感测预定频率范围内的旋转振动的旋转速度分量的独立感测单元，以及用于接收来自感测的输出的最佳滤波器组合 单元。

公开(公告)号：US06567230B1

公开(公告)日：2003-05-20

申请号：US09429696

申请日：1999-10-28

申请人： Naoyuki Kagami ,  Akira Tokizono ,  Sri M. Sri-Jayantha ,  Tatsuya Sakai ,  Isao Yoneda ,  Hien Phu Dang ,  Arun Sharma

发明人： Naoyuki Kagami ,  Akira Tokizono ,  Sri M. Sri-Jayantha ,  Tatsuya Sakai ,  Isao Yoneda ,  Hien Phu Dang ,  Arun Sharma

IPC分类号： G11B2102

CPC分类号： H03H17/0294 ,  G11B5/5521 ,  G11B5/56

摘要： A method and system for utilizing a digital filter for actuator positioning control in a disk device. In accordance with the method and system of the present invention multiple selectable filter modules are provided. Each of the multiple selectable filter modules functions in a serial or parallel filtering mode when selected. Multiple configurable registers are also provided wherein the configuration of each of the multiple configurable registers determines a selection of at least one of the multiple selectable filter modules. Particular ones of the multiple configurable registers are selected, such that a configuration of the digital filter is dynamically selectable in order to achieve a predetermined filter output.

摘要翻译： 一种利用数字滤波器在盘装置中执行器定位控制的方法和系统。 根据本发明的方法和系统，提供了多个可选择的过滤器模块。 多个可选滤波器模块中的每一个在选择时以串行或并行滤波模式运行。 还提供了多个可配置寄存器，其中多个可配置寄存器中的每一个的配置确定多个可选择滤波器模块中的至少一个的选择。 选择多个可配置寄存器中的特定的寄存器，使得可以动态地选择数字滤波器的配置以便实现预定的滤波器输出。