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公开(公告)号：US08743492B2
公开(公告)日：2014-06-03
申请号：US13554966
申请日：2012-07-20
申请人： Nhan X. Bui , Kevin B. Judd , Tomoko Taketomi
发明人： Nhan X. Bui , Kevin B. Judd , Tomoko Taketomi
IPC分类号： G11B27/36
CPC分类号： G11B5/00817 , G11B5/0083 , G11B5/09 , G11B5/584 , G11B20/10388 , G11B27/36
摘要： In one embodiment, a data storage system includes a head; a drive mechanism for passing a medium over the head; a controller electrically coupled to the head; logic encoded in or available to the controller for: periodically determining a stopwrite threshold based on a standard deviation or a variance at a current position error signal sample, wherein a smoothing factor applied to a subsequent calculation of the standard deviation or variance is altered based at least in part on a current magnitude of the standard deviation or the variance; determining whether the current position error signal sample exceeds the stopwrite threshold; disabling writing when the current position error signal sample exceeds the stopwrite threshold; and enabling writing when the current position error signal sample does not exceed the stopwrite threshold. Other systems, methods, and computer program products are described according to more embodiments.
摘要翻译： 在一个实施例中，数据存储系统包括头部; 用于使介质通过头部的驱动机构; 控制器电耦合到头部; 编码在或可用于控制器的逻辑，用于：基于当前位置误差信号样本的标准偏差或方差周期性地确定停止写入阈值，其中应用于随后的标准偏差或方差的计算的平滑因子基于 至少部分地基于当前的标准偏差或方差的大小; 确定当前位置误差信号样本是否超过限制写入阈值; 当当前位置错误信号样本超过限制写入阈值时禁止写入; 并且当当前位置误差信号采样不超过限制写入阈值时使能写入。 根据更多实施例描述其它系统，方法和计算机程序产品。
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2.发明授权Tension transients suppression during acceleration and/or deceleration for storage tape drive 有权用于存储磁带机的加速和/或减速期间的张力瞬变抑制公开(公告)号：US08681448B1
公开(公告)日：2014-03-25
申请号：US13600104
申请日：2012-08-30
申请人： Nhan X. Bui , Eiji Ogura
发明人： Nhan X. Bui , Eiji Ogura
CPC分类号： G11B15/43 , B65H23/198 , G11B5/00821 , G11B5/584 , G11B15/46 , G11B15/52 , G11B15/54
摘要： In one embodiment, a system includes a controller configured to: determine a reference velocity at various intervals, receive or determine a secondary velocity based at least in part on a parameter associated with a drive mechanism motor, determine a value representative of a difference between the reference velocity and secondary velocity, adjust a speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and secondary velocity, receive/determine a primary velocity based on reading information encoded on a magnetic tape, at a switching point, make the reference velocity about equal to the primary velocity, after the switching point, determine the reference velocity at various intervals, after the switching point, determine a value representative of a difference between the reference velocity and primary velocity, and adjust the speed of the motor of the drive mechanism for minimizing the difference between the reference velocity and primary velocity.
摘要翻译： 在一个实施例中，系统包括控制器，其被配置为：至少部分地基于与驱动机构电动机相关联的参数来确定不同间隔的参考速度，接收或确定二次速度，确定代表 参考速度和二次速度，调整驱动机构的电机的速度，以最小化参考速度和次速之间的差异，基于读取在磁带上编码的信息，在切换点处接收/确定主速度，使 在切换点之后，参考速度约等于主速度，在切换点之后确定不同间隔的参考速度，确定代表参考速度和主速度之差的值，并调整电机的速度 用于最小化参考速度和初级之间的差的驱动机构 速度
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3.发明授权公开(公告)号：US08213105B2
公开(公告)日：2012-07-03
申请号：US12613409
申请日：2009-11-05
CPC分类号： G11B5/584 , G11B5/00813
摘要： Various embodiments for addressing time-varying periodic disturbances in a servo control system are provided. Each of a plurality of coefficients is updated based on an estimation of at least one disturbance frequency. The updated plurality of coefficients is provided to at least one peak filter modifying an input signal of the servo control system. The peak filter is operable in view of the updated plurality of coefficients to cancel at least one of the time-varying periodic disturbances.
摘要翻译： 提供了用于解决伺服控制系统中的时变周期性干扰的各种实施例。 基于至少一个干扰频率的估计来更新多个系数中的每一个。 将更新的多个系数提供给修改伺服控制系统的输入信号的至少一个峰值滤波器。 考虑到更新的多个系数，峰值滤波器可操作以消除时变周期性干扰中的至少一个。
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公开(公告)号：US08023223B2
公开(公告)日：2011-09-20
申请号：US12878722
申请日：2010-09-09
申请人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted parameter estimate and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. An offset computation module provides first and second offset terms which are summed with the unweighted parameter estimates. Multiplying nodes receive the unweighted parameter estimates and the weight signals and outputs offset weighted parameter estimates. A summing node receives the offset weighted parameter estimates and outputs a combined offset weighted parameter estimate to a servomechanism.
摘要翻译： 加权组合方案利用来自并行操作的两个伺服通道的信息。 基于定时的伺服模块包括分别耦合的两个同步伺服通道，以接收从数据磁带读取的两个数字伺服信号。 两个通道具有未加权参数估计的输出和通道可靠性的度量。 权重计算模块使用来自伺服信道的信道可靠性的测量来提供第一和第二加权信号。 偏移计算模块提供与未加权参数估计相加的第一和第二偏移项。 乘法节点接收未加权的参数估计和权重信号并输出偏移加权参数估计。 求和节点接收偏移加权参数估计，并将组合的偏移加权参数估计输出到伺服机构。
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公开(公告)号：US08000057B2
公开(公告)日：2011-08-16
申请号：US12878704
申请日：2010-09-09
申请人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted parameter estimate and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. An offset computation module provides first and second offset terms which are summed with the unweighted parameter estimates. Multiplying nodes receive the unweighted parameter estimates and the weight signals and outputs offset weighted parameter estimates. A summing node receives the offset weighted parameter estimates and outputs a combined offset weighted parameter estimate to a servomechanism.
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公开(公告)号：US07982988B2
公开(公告)日：2011-07-19
申请号：US12400369
申请日：2009-03-09
申请人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Giovanni Cherubini , Roy D. Cideciyan , Robert A. Hutchins , Jens Jelitto , Kazuhiro Tsuruta
CPC分类号： G11B5/584
摘要： A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module servo module comprises two servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted metric and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. A first multiplying node receives a first unweighted metric and a first weight signal and is operable to output a first weighted metric. A second multiplying node receives a second unweighted metric and a second weight signal and outputs a second weighted metric. A summing node receives the first and second weighted metrics and outputs a combined weighted metric to an LPOS word decoder.
摘要翻译： 加权组合方案利用来自并行操作的两个伺服通道的信息。 基于定时的伺服模块伺服模块包括分别耦合的两个伺服通道，以接收从数据磁带读取的两个数字伺服信号。 两个通道都具有未加权度量的输出和通道可靠性的度量。 权重计算模块使用来自伺服信道的信道可靠性的测量来提供第一和第二加权信号。 第一乘法节点接收第一未加权度量和第一加权信号，并且可操作以输出第一加权度量。 第二乘法节点接收第二未加权度量和第二加权信号并输出第二加权度量。 求和节点接收第一和第二加权度量，并将组合加权度量输出到LPOS字解码器。
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7.发明申请公开(公告)号：US20110170214A1
公开(公告)日：2011-07-14
申请号：US12686302
申请日：2010-01-12
CPC分类号： G11B15/62 , G11B15/43 , G11B15/602
摘要： Magnetic tape devices encounter read and/or write errors when the tape is not being passed across the head with the proper tension and/or skew angle. According to one embodiment, a system which corrects for these problems comprises a head having an array of at least one of readers and writers, a drive mechanism for passing a magnetic recording tape over the head, a skew-inducing mechanism coupled to the head for adjusting a skew angle of a longitudinal axis of the array relative to a direction normal to a direction of tape travel over the head, and a controller in communication with the head. The system also determines a tape dimensional stability state of the tape and adjust the skew angle away from normal to the direction of tape travel and lowers a tension of the tape across the head if the tape dimensional stability state is in a contracted state.
摘要翻译： 当磁带没有以适当的张力和/或倾斜角度穿过磁头时，磁带设备会遇到读取和/或写入错误。 根据一个实施例，校正这些问题的系统包括具有读取器和写入器中的至少一个的阵列的头部，用于将磁记录带通过头部的驱动机构，耦合到头部的偏斜引导机构 调整所述阵列的纵向轴线相对于垂直于所述头部上的带行进方向的方向的倾斜角度，以及与所述头部连通的控制器。 该系统还确定胶带的胶带尺寸稳定性状态，并且如果胶带尺寸稳定状态处于收缩状态，则将偏斜角度调整为离开行走方向远离纸张行进方向并降低胶带横过头部的张力。
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8.发明申请公开(公告)号：US20090213489A1
公开(公告)日：2009-08-27
申请号：US12036905
申请日：2008-02-25
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： A method and system for servo stripe width detection and compensation including moving a magnetic tape in a first direction across a magnetic tape head, the magnetic tape having a servo band including a first servo pattern and a second servo pattern, the magnetic tape head having a servo element; detecting a leading edge and a trailing edge of the first servo pattern with the servo element; detecting a leading edge and a trailing edge of the second servo pattern with the servo element; determining a first time from the leading edge of the first servo pattern to the leading edge of the second servo pattern; determining a second time from the trailing edge of the first servo pattern to the trailing edge of the second servo pattern; and determining a correction value from a difference between the first time and the second time.
摘要翻译： 一种用于伺服条宽检测和补偿的方法和系统，包括在磁带头上沿第一方向移动磁带，磁带具有包括第一伺服模式和第二伺服模式的伺服带，磁带头具有 伺服元件 用伺服元件检测第一伺服模式的前缘和后缘; 用伺服元件检测第二伺服模式的前缘和后缘; 确定从第一伺服模式的前沿到第二伺服模式的前沿的第一时间; 确定从第一伺服模式的后沿到第二伺服模式的后沿的第二时间; 以及从所述第一时间和所述第二时间之间的差确定校正值。
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9.发明授权公开(公告)号：US07391585B1
公开(公告)日：2008-06-24
申请号：US11619101
申请日：2007-01-02
CPC分类号： G11B15/64 , G11B15/1808 , G11B15/20 , G11B15/43
摘要： Disclosed is a method for reducing occurrences of stick conditions in tape, the method including stopping rotation of a supply reel and take-up reel of a drive that includes a length of tape, a portion of the tape extending between the reels and contacting a head between the reels, wherein the stopping creates a stop condition in the drive, determining if the tape is stuck to the head, dropping tension in the tape between the reels, freeing the tape for movement in a z-direction via the dropping tension, moving the head in y-directions, moving the tape in an x-direction via a rotation of the supply reel a fraction of a rotation, and causing the tape to break contact with the head via the dropping, moving of the tape in the z-direction, moving of the tape in the x-direction, and/or moving of the head in the y-directions.
摘要翻译： 公开了一种用于减少胶带中的条件的发生的方法，该方法包括停止包括一段胶带的驱动器的供带盘和卷取卷轴的旋转，所述带的一部分在卷轴之间延伸并接触头部 在所述卷轴之间，其中所述停止在所述驱动器中产生停止状态，确定所述带是否粘附到所述头部，在所述卷轴之间降低所述带中的张力，释放所述带以通过所述滴下张力沿z方向移动，移动 磁头在y方向上，通过供给卷轴的旋转沿x方向移动磁带的一小部分旋转，并且使磁带经由下落，磁带在z轴方向上移动而与头部断开接触， 方向，沿x方向移动胶带，和/或使头部沿y方向移动。
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10.发明授权公开(公告)号：US06963467B2
公开(公告)日：2005-11-08
申请号：US09907306
申请日：2001-07-17
CPC分类号： G11B5/584
摘要： A method and apparatus for compensating for media shift due to spiral groove roller tape guide is disclosed. The lateral tape shift is measured. Then the control of the coarse actuator is adjusted for the lateral tape shift so that the movement of the coarse actuator follows the tape shift.
摘要翻译： 公开了一种用于补偿由于螺旋槽辊带引导引起的介质偏移的方法和装置。 测量横向胶带位移。 然后调整粗调机构的控制，使其侧向带位移，使得粗执行器的移动跟随磁带位移。
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