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1. 发明授权

US06937423B1 Reducing effects of rotational vibration in disk drive 失效
标题翻译：减少磁盘驱动器中旋转振动的影响
公开(公告)号：US06937423B1
公开(公告)日：2005-08-30
申请号：US10773526
申请日：2004-02-06
申请人： Lan V. Ngo , Raffi Codilian
发明人： Lan V. Ngo , Raffi Codilian
IPC分类号： G11B5/55 , G11B5/596 , G11B33/08
CPC分类号： G11B5/5582 , G11B5/59694 , G11B33/08
摘要： A method of reducing rotational vibration effects in a disk drive by sensing vibration in a sensor and generating corresponding sensor data; deriving a statistical sensor (SS) value based on the sensor data; deriving a statistical position error signal (SPES) value from servo sectors read by the head; comparing the SS value to a SS-threshold value; comparing SPES value to a SPES-threshold value; and generating a feed-forward command effort signal for reducing rotational vibration effects if the SS value exceeds the SS-threshold value and if SPES value exceeds the SPES-threshold value.
摘要翻译：通过感测传感器中的振动并产生相应的传感器数据来减少磁盘驱动器中的旋转振动效应的方法; 基于传感器数据得出统计传感器（SS）值; 从头部读取的伺服扇区得到统计位置误差信号（SPES）值; 将SS值与SS阈值进行比较; 将SPES值与SPES阈值进行比较; 并且如果SS值超过SS阈值并且SPES值超过SPES阈值，则产生用于减少旋转振动效应的前馈命令努力信号。

2. 发明授权

US06952318B1 Scaling linear vibration sensor data in disk drive 失效
标题翻译：在磁盘驱动器中缩放线性振动传感器数据
公开(公告)号：US06952318B1
公开(公告)日：2005-10-04
申请号：US10769444
申请日：2004-01-30
申请人： Lan V. Ngo
发明人： Lan V. Ngo
IPC分类号： G11B5/55 , G11B5/596 , G11B19/02
CPC分类号： G11B5/5534 , G11B5/596
摘要： A method for reducing the effects of rotational vibration in a disk drive comprising generating a self-induced vibration in the disk drive, and sensing the self-induced vibration in the first and second sensors and generating a corresponding first and second sensor data. The method further comprises comparing the first and second sensor data to determine a gain-differential, and scaling at least one of the first and second sensor data to reduce the gain-differential between the first and second sensors.
摘要翻译：一种用于减小磁盘驱动器中旋转振动的影响的方法，包括在磁盘驱动器中产生自身引起的振动，并且感测第一和第二传感器中的自身引起的振动并产生相应的第一和第二传感器数据。该方法还包括比较第一和第二传感器数据以确定增益差分，以及缩放第一和第二传感器数据中的至少一个，以减小第一和第二传感器之间的增益差。

3. 发明授权

US06710966B1 Method for reducing an effect of vibration on a disk drive during a track following operation by adjusting an adaptive-filter gain applied to an acceleration sensor signal 有权
标题翻译：用于通过调整施加于加速度传感器信号的自适应滤波器增益来减小轨道跟随操作期间振动对磁盘驱动器的影响的方法
公开(公告)号：US06710966B1
公开(公告)日：2004-03-23
申请号：US10003943
申请日：2001-10-23
申请人： Raffi Codilian , Aswartha Narayana , Lan V. Ngo
发明人： Raffi Codilian , Aswartha Narayana , Lan V. Ngo
IPC分类号： G11B5596
CPC分类号： G11B5/59627 , G11B5/59694
摘要： The present invention may be embodied in a method, implemented in a disk drive, for adaptively reducing an effect of vibration during a track following operation. The disk drive includes a disk and a rotary actuator. The disk includes distributed position information in a plurality of servo wedges. The actuator carries a transducer and pivots on a base of the disk drive. The actuator may exhibit an imbalance that may be affected by a linear vibration. In the method, a sensor signal is generated that is responsive to a vibration to the disk drive. The sensor value is modified based on an adaptive-filter gain to generate a position error adjustment signal for modifying a nominal position error signal. The adaptive-filter gain is then altered based on an adjusted position error signal and the sensor value associated with the current servo wedge for use during a next servo wedge.
摘要翻译：本发明可以以在磁盘驱动器中实施的方法来实现，用于在跟踪操作期间自适应地减小振动的影响。磁盘驱动器包括盘和旋转致动器。盘包括多个伺服楔中的分布位置信息。执行器承载一个传感器并在磁盘驱动器的基座上枢转。致动器可能表现出可能受到线性振动影响的不平衡。在该方法中，产生响应于磁盘驱动器的振动的传感器信号。基于自适应滤波器增益修改传感器值，以产生用于修改标称位置误差信号的位置误差调整信号。然后基于调整的位置误差信号和与当前伺服楔形件相关联的传感器值来改变自适应滤波器增益，以在下一个伺服楔形中使用。

4. 发明授权

US06914743B1 Vibration cancellation in a disk drive by using an acceleration sensor and adaptively adjusting its gain to minimize external acceleration effects 失效
标题翻译：通过使用加速度传感器对磁盘驱动器进行振动消除，并自适应调整其增益以最小化外部加速度效应
公开(公告)号：US06914743B1
公开(公告)日：2005-07-05
申请号：US09728626
申请日：2000-11-30
申请人： Aswartha Narayana , Raffi Codilian , Lan V. Ngo
发明人： Aswartha Narayana , Raffi Codilian , Lan V. Ngo
IPC分类号： G11B5/55 , G11B5/596
CPC分类号： G11B5/5582 , G11B5/59694
摘要： Disclosed is a disk drive using an accelerometer to sense linear vibration and cancel its effects with an adaptive algorithm during track following. The accelerometer is oriented to detect acceleration associated with torque that tends to cause the actuator to move off-track notwithstanding the efforts of the servo control system. The accelerometer's filtered output is used to modify the control effort. The disk drive uses the position error signal to adaptively filter the accelerometer's output in an effort to mathematically converge on a set of optimal filter coefficients and thereby reduce the effect of vibration that may otherwise impose a torque on the actuator.
摘要翻译：公开了一种磁盘驱动器，其使用加速度计来感测线性振动并且在跟踪期间利用自适应算法来消除其影响。加速度计被定向以检测与扭矩相关联的加速度，尽管伺服控制系统的努力，倾向于使致动器移动离开轨道。加速度计的滤波输出用于修改控制功能。磁盘驱动器使用位置误差信号来自适应地过滤加速度计的输出，以便在数学上收敛于一组最佳滤波器系数，从而减少否则在致动器上施加扭矩的振动的影响。

5. 发明授权

US07023640B1 Acceleration disturbance detection subsystem for use with disk drives 有权
标题翻译：用于磁盘驱动器的加速度干扰检测子系统
公开(公告)号：US07023640B1
公开(公告)日：2006-04-04
申请号：US10856400
申请日：2004-05-27
申请人： Raffi Codilian , Lan V. Ngo , Norman D. Gardner
发明人： Raffi Codilian , Lan V. Ngo , Norman D. Gardner
IPC分类号： G11B19/04 , G11B21/02 , G11B19/02
CPC分类号： G11B19/04 , G11B5/5582 , G11B5/596
摘要： A disk drive comprising a first sensor mounted on a nominally stationary portion of the disk drive and adapted to detect acceleration disturbances of the disk drive. The disk drive further comprising: a dual-function subsystem having a first circuit adapted to provide a write-inhibit signal and a second circuit adapted to provide a feed-forward basis signal, the dual-function subsystem adapted to receive a first sensor signal from the first sensor and to provide (a) the write-inhibit signal based on the received first sensor signal and a first threshold value, and (b) the feed-forward basis signal based on the received first sensor signal.
摘要翻译：一种磁盘驱动器，包括安装在磁盘驱动器的标称静止部分上并适于检测磁盘驱动器的加速度干扰的第一传感器。所述磁盘驱动器还包括：双功能子系统，具有适于提供写禁止信号的第一电路和适于提供前馈基准信号的第二电路，所述双功能子系统适于从并且基于所接收的第一传感器信号和第一阈值提供（a）禁止写入信号，以及（b）基于所接收的第一传感器信号的前馈基准信号。

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