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1. 发明授权

US06236527B1 Disk drive with actuator load/unload controller 失效
标题翻译：带执行器负载/卸载控制器的磁盘驱动器
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disk, if a shock is sensed, loading is stopped and an immediate unloading is performed to return the actuator to the withdrawn position.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。

2. 发明授权

US06229663B1 Disk drive loading/unloading apparatus and method for controlling the apparatus 失效
标题翻译：磁盘驱动装载装置及控制装置的方法
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。

3. 发明授权

US6108157A Head mechanism control apparatus, disk drive, and head unload control method 失效
标题翻译：头机构控制装置，磁盘驱动器和磁头卸载控制方法
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。

4. 发明授权

US5923491A Disk drive servo control system with selectable filtering for reduction of repeatable runout 失效
标题翻译：磁盘驱动器伺服控制系统，具有可选择的过滤功能，可减少可重复的跳动
公开(公告)号：US5923491A
公开(公告)日：1999-07-13
申请号：US681411
申请日：1996-07-22
申请人： Masashi Kisaka , Nobuyuki Kitazaki , Takashi Nakamura , Yuji Yokoe , Isao Yoneda
发明人： Masashi Kisaka , Nobuyuki Kitazaki , Takashi Nakamura , Yuji Yokoe , Isao Yoneda
IPC分类号： G11B5/596 , G11B21/10
CPC分类号： G11B21/106 , G11B5/59627 , G11B5/59633
摘要： The present invention determines whether a filter is used for reading and writing on a disk to correct repeatable runout. The invention estimates the magnitude of repeatable runout for each disk by measuring the maximum absolute value of a state variable of a filter when the disk is turned on or when the disk returns from a sleep mode, and compares the measured value to a predetermined criterion such as the track width. If the magnitude of the repeatable runout is less than or equal to the predetermined criterion, the filter is not used. If the magnitude of the repeatable runout exceeds the predetermined criterion, the invention reads and writes data using the filter.
摘要翻译：本发明确定滤波器是否用于读取和写入磁盘以校正可重复的跳动。本发明通过测量当盘被打开时或当盘从睡眠模式返回时的过滤器的状态变量的最大绝对值，来估计每个盘的可重复跳动的幅度，并将测量值与预定标准作为轨道宽度。如果可重复跳动的幅度小于或等于预定标准，则不使用滤波器。如果可重复跳动的幅度超过预定标准，本发明使用滤波器读取和写入数据。

5. 发明授权

US06515813B2 Method for controlling servo information detection timing and rotational speed of disk, and disk drive 失效
标题翻译：伺服信息检测定时和磁盘转速以及磁盘驱动器的控制方法
公开(公告)号：US06515813B2
公开(公告)日：2003-02-04
申请号：US09764538
申请日：2001-01-17
申请人： Nobuyuki Kitazaki , Kenji Ogasawara , Yutaka Ozawa , Isao Yoneda
发明人： Nobuyuki Kitazaki , Kenji Ogasawara , Yutaka Ozawa , Isao Yoneda
IPC分类号： G11B509
CPC分类号： G11B5/59611 , G11B19/28 , G11B20/14
摘要： A method to enable servo information to be detected surely and stably even when a time interval between servo sectors is changed due to disk shifting. A time interval TS(i) is calculated according to an internal variable value, which is in proportion to a displacement &Dgr;r(i) of a servo area SF(i) in a radial direction of a subject disk (step S6). The displacement &Dgr;r(i) is calculated from already detected servo information[, thereby]. Thereby, a time interval for detecting servo information is adjusted according to the above described time interval TS(i) (steps S7 and S4). The time interval TS(i) is the time interval between passing of a servo sector in the servo area SF(i) under the head H and passing of a servo sector in the servo area SF(i+1) under the head H.
摘要翻译：即使伺服扇区之间的时间间隔由于盘移动而改变，也能够确保和稳定地检测伺服信息。时间间隔TS（i）根据内部变量值计算，该内部变量值与目标盘的径向方向上的伺服区域SF（i）的位移量DELTAr（i）成比例（步骤S6）。从已经检测的伺服信息[由此]计算位移ΔTATA（i）。由此，根据上述时间间隔TS（i）来调整用于检测伺服信息的时间间隔（步骤S7和S4）。时间间隔TS（i）是在头部H下的伺服区域SF（i）中的伺服扇区通过之间的时间间隔，并且在头部H下的伺服区域SF（i + 1）中伺服扇区通过之间的时间间隔。

6. 发明授权

US5754355A Disk drive apparatus and read error recovery method in a disk drive apparatus 失效
标题翻译：磁盘驱动装置中的磁盘驱动装置和读取错误恢复方法
公开(公告)号：US5754355A
公开(公告)日：1998-05-19
申请号：US633596
申请日：1996-04-17
申请人： Takashi Nakamura , Isao Yoneda , Yuji Yokoe , Kazushi Tsuwako , Fujio Harako , Katsumi Suda , Michio Nakajima , Kenji Ogasawara
发明人： Takashi Nakamura , Isao Yoneda , Yuji Yokoe , Kazushi Tsuwako , Fujio Harako , Katsumi Suda , Michio Nakajima , Kenji Ogasawara
IPC分类号： G11B5/00 , G11B5/60 , G11B19/04 , G11B19/20 , G11B23/50 , G11B15/46
CPC分类号： G11B5/6005 , G11B19/04 , G11B19/20 , G11B23/505 , G11B2005/0016
摘要： A disk drive apparatus and read error recovery method in a disk drive apparatus removes thermal asperities on disk surfaces. A projection, such as a thermal asperity, on the recording surfaces of disks is detected when a signal transducer head contacts the projection. The flying height of the signal transducer head is lowered, e.g., by changing the disk rotation speed from the normal rotation speed in read/write operations or by heating a suspension having a bimetal element, while the signal transducer head is positioned over the detected projection on the track. The signal transducer head strikes the projection to break the projection. This avoids a subsequent error from being caused by the thermal asperity.
摘要翻译：磁盘驱动装置中的磁盘驱动装置和读取错误恢复方法去除磁盘表面上的热凹凸。当信号传感器头接触投影时，检测到盘的记录表面上的诸如热不均匀性的投影。信号传感器头的飞行高度例如通过在读/写操作中通过将盘旋转速度从正常旋转速度改变或通过加热具有双金属元件的悬架而降低，同时信号传感器头位于检测到的投影上方在轨道上。信号传感器头撞击突起以断开突起。这避免了由于热不平坦造成的后续错误。

7. 发明授权

US6151183A Disk drive device and method for controlling the same 失效
标题翻译：磁盘驱动装置及其控制方法
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。

8. 发明授权

US6075671A Method for unsticking a head/slider assembly from a surface of a magnetic recording disk and a disk drive device 失效
标题翻译：用于从磁记录盘和盘驱动装置的表面分离头/滑块组件的方法
公开(公告)号：US6075671A
公开(公告)日：2000-06-13
申请号：US99709
申请日：1998-06-19
申请人： Isao Yoneda , Shusuke Kurihara
发明人： Isao Yoneda , Shusuke Kurihara
IPC分类号： G11B21/21 , G11B5/60 , G11B21/02
CPC分类号： G11B5/6005
摘要： The invention relates to magnetic recording devices and a method for unsticking a head/slider assembly stuck on the surface of a magnetic recording disk. The method includes a first step which determines a resonant frequency of a mechanical system containing a magnetic recording disk, a head/slider assembly and a flexible support arm in which the resonant frequency of the mechanical system varies depending upon a position of the head/slider assembly on the surface of the magnetic recording disk, and a second step which oscillates the spindle motor and/or the voice coil motor at the resonant frequency to unstick the head/slider assembly from the surface of the magnetic recording disk.
摘要翻译：本发明涉及磁记录装置和一种粘贴在磁记录盘表面上的头/滑块组件的脱色方法。该方法包括第一步骤，其确定包含磁记录盘的机械系统的共振频率，头/滑块组件和柔性支撑臂，其中机械系统的谐振频率根据头/滑块的位置而变化组装在磁记录盘的表面上，第二步骤使主轴电动机和/或音圈电动机以共振频率摆动，以使磁头/滑块组件脱离磁记录盘的表面。

9. 发明授权

US06181507B2 Increased and randomized output sampling to reduce positioning noise in a data storage system 失效
标题翻译：增加和随机输出采样，以减少数据存储系统中的定位噪声
公开(公告)号：US06181507B2
公开(公告)日：2001-01-30
申请号：US08692164
申请日：1996-08-05
申请人： Nobuyuki Kitazaki , Kiyoshi Satoh , Arun Sharma , Sri Muthuthamby Sri-Jayantha , Isao Yoneda
发明人： Nobuyuki Kitazaki , Kiyoshi Satoh , Arun Sharma , Sri Muthuthamby Sri-Jayantha , Isao Yoneda
IPC分类号： G11B5596
CPC分类号： G11B5/59605 , G11B5/59627 , G11B5/5965
摘要： A method and system for reducing positioning noise in a data storage system are provided. An access device is positioned over a data storage medium using a stream of bursts stored on the medium. The bursts are sensed at a frequency determined by the rate at which the medium is moved relative to a sensing device. Output positioning values are provided to position the access device at a frequency higher than the frequency at which the positioning bursts are sensed, and/or at random times. The random times may be calculated as random advances or delays from time points occurring at a fixed frequency.
摘要翻译：提供了一种用于降低数据存储系统中的定位噪声的方法和系统。访问设备使用存储在介质上的突发流来定位在数据存储介质上。以由介质相对于感测装置移动的速率确定的频率感测脉冲串。提供输出定位值以将访问设备定位在高于感测定位脉冲串的频率的频率处和/或随机时间。随机时间可以被计算为在固定频率发生的时间点的随机前进或延迟。

10. 发明授权

US06532129B1 Method and apparatus for sustaining feedback filter state having periodic output 失效
标题翻译：用于维持具有周期性输出的反馈滤波器状态的方法和装置
公开(公告)号：US06532129B1
公开(公告)日：2003-03-11
申请号：US09330180
申请日：1999-06-11
申请人： Sri Muthuthamby Sri-Jayantha , Hien P. Dang , Arun Sharma , Isao Yoneda , Nobuyuki Kitazaki
发明人： Sri Muthuthamby Sri-Jayantha , Hien P. Dang , Arun Sharma , Isao Yoneda , Nobuyuki Kitazaki
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： A disk drive system, includes a head, a controller for controlling an operation of the head, at least one feedback filter coupled in relation to the controller, and a mechanism for keeping a function of the at least one of the feedback filter active during any of an absence of a valid position error signal (PES) and a position error signal being unavailable due to a defect during an operation of the head.
摘要翻译：磁盘驱动器系统包括磁头，用于控制磁头的操作的控制器，相对于控制器耦合的至少一个反馈滤波器，以及用于保持反馈滤波器中的至少一个功能在任何没有有效位置误差信号（PES）和位置误差信号由于在头部的操作期间的缺陷而不可用。

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