公开(公告)号：US06819065B1

公开(公告)日：2004-11-16

申请号：US10620232

申请日：2003-07-14

申请人： James J. Howarth ,  James M. Karp ,  John A. Koski ,  Randy C. Inch

发明人： James J. Howarth ,  James M. Karp ,  John A. Koski ,  Randy C. Inch

IPC分类号： B65H5938

CPC分类号： G11B15/48 ,  B65H2801/45

摘要： An apparatus and method for the controlled dynamic braking of a DC motor in a tape transport device are provided. A PWM state device includes a plurality of state transition paths, each path having an initial state, representative of a tape profile, including a predetermined range of tape velocities, relative amounts of tape on each reel and an initial tape tension, and at least one subsequent state. When a low power event is detected, one of the state transition paths is selected, based upon a current tape profile, and an associated PWM signal is transmitted to the motor. An energy storage device provides power to the PWM state device during the low power event. The PWM signals follow the selected transition path to modulate the current generated by the motion of the motor and thereby create a decelerating force while substantially maintaining the initial tape tension.

摘要翻译： 提供了一种用于磁带传送装置中的DC电动机的受控动态制动的装置和方法。 PWM状态设备包括多个状态转移路径，每个路径具有代表磁带轮廓的初始状态，包括磁带速度的预定范围，每个磁带上的磁带的相对量和初始磁带张力，以及至少一个 后续状态。 当检测到低功率事件时，基于当前磁带简档来选择状态转换路径之一，并且将相关联的PWM信号发送到电动机。 能量存储装置在低功率事件期间向PWM状态装置供电。 PWM信号遵循所选择的过渡路径以调制由电动机的运动产生的电流，从而产生减速力，同时基本保持初始带张力。

公开(公告)号：US20140029125A1

公开(公告)日：2014-01-30

申请号：US13562290

申请日：2012-07-30

申请人： Randy C. Inch ,  Kevin B. Judd

发明人： Randy C. Inch ,  Kevin B. Judd

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B20/10388 ,  G11B5/584 ,  G11B2220/956

摘要： A method for accurately adjusting skew in the presence of tape motion includes performing a calibration run of magnetic tape in a tape drive. During the calibration run, the method records skew readings at selected intervals. The method then finds a range associated with the skew readings, such as by finding a high and low skew reading. The method then finds a center point of the range, and a difference between the center point and a desired center point. The method applies the difference to each recorded skew reading to generate a target skew reading for each recorded skew reading. The method generates a skew error signal that reflects the difference between each recorded skew reading and each corresponding target skew reading. The skew error signal will generally be consistent even as the tape moves, thereby allowing a technician to easily adjust and optimize the skew.

摘要翻译： 在存在磁带运动的情况下精确地调整偏斜的方法包括在磁带驱动器中执行磁带的校准运行。 在校准运行期间，该方法以选定的间隔记录偏斜读数。 该方法然后找到与偏斜读数相关联的范围，例如通过找到高和低偏斜读数。 然后，该方法找到范围的中心点，以及中心点与期望中心点之间的差。 该方法将差异应用于每个记录的偏斜读数，以产生每个记录的倾斜读数的目标歪斜读数。 该方法产生反映每个记录的偏斜读数与每个相应的目标歪斜读数之间的差异的偏斜误差信号。 即使磁带移动，偏斜误差信号通常也是一致的，从而允许技术人员容易地调整和优化偏斜。

公开(公告)号：US08780484B2

公开(公告)日：2014-07-15

申请号：US13600094

申请日：2012-08-30

申请人： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

发明人： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

IPC分类号： G11B15/52 ,  G11B15/46

CPC分类号： G11B15/46 ,  G11B5/00813 ,  G11B5/0083 ,  G11B5/40 ,  G11B5/60 ,  G11B15/467 ,  G11B15/52 ,  G11B15/62

摘要： A method according to one embodiment includes setting a default friction value to a predetermined value, determining whether a primary velocity is valid, determining a velocity error, determining whether the velocity error is in a predetermined range, accumulating the velocity error when the velocity error is determined to be in the predetermined range, repeating, until a time period has elapsed, each of: the determining the velocity error, the determining whether the velocity error is in the predetermined range, and the accumulating the velocity error when the velocity error is determined to be in the predetermined range, and calculating a new friction value based on the accumulated velocity error.

摘要翻译： 根据一个实施例的方法包括将默认摩擦值设置为预定值，确定主速度是否有效，确定速度误差，确定速度误差是否在预定范围内，当速度误差为 确定为在预定范围内，重复，直到经过时间段为止：确定速度误差，确定速度误差是否在预定范围内，并且当确定速度误差时累积速度误差 处于预定范围内，并且基于累积的速度误差来计算新的摩擦值。

公开(公告)号：US08767335B2

公开(公告)日：2014-07-01

申请号：US13600069

申请日：2012-08-30

申请人： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

发明人： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

IPC分类号： G11B15/18 ,  G11B15/46 ,  B65H59/38

CPC分类号： G11B15/32 ,  G11B5/584 ,  G11B15/46

摘要： A method according to one embodiment includes selecting an initial radius value (Rfull) for an outgoing reel, where Rfull is the initial radius of a tape on the outgoing reel; unwinding the tape from the outgoing reel; computing a radius value of the tape on the outgoing reel during the unwinding; adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position; and outputting the adjusted computed radius. A method according to another embodiment includes selecting an initial radius value (R0) for an incoming reel, where R0 is the initial radius of the incoming reel; winding the tape onto the incoming reel; computing a radius value of the tape on the incoming reel during the winding; adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position; and outputting the adjusted computed radius.

摘要翻译： 根据一个实施例的方法包括为输出卷轴选择初始半径值（Rfull），其中Rfull是输出卷轴上的带的初始半径; 从出纸卷轴上取出胶带; 在展开期间计算输出卷轴上的胶带的半径值; 利用从带位置直接测量速度计算的偏移来调整计算出的半径; 并输出调整后的计算半径。 根据另一实施例的方法包括：对于输入卷轴选择初始半径值（R0），其中R0是输入卷轴的初始半径; 将胶带卷绕到进纸卷轴上; 在卷绕期间计算进纸卷轴上的胶带的半径值; 利用从带位置直接测量速度计算的偏移来调整计算出的半径; 并输出调整后的计算半径。

公开(公告)号：US08526134B2

公开(公告)日：2013-09-03

申请号：US13152238

申请日：2011-06-02

申请人： Nhan X. Bui ,  Reed A. Hancock ,  Randy C. Inch

发明人： Nhan X. Bui ,  Reed A. Hancock ,  Randy C. Inch

IPC分类号： G11B5/584

CPC分类号： G11B21/103 ,  G11B5/584

摘要： A servo system according to one embodiment includes at least one servo sensor for sensing a lateral position of a magnetic head with respect to at least one defined servo track of a longitudinal tape; a fine actuator configured to translate the magnetic head laterally with respect to the longitudinal tape; a coarse actuator configured to translate the fine actuator laterally with respect to the longitudinal tape; and a servo control. The servo control is configured to perform various operations that may be used to estimate a midpoint of lateral tape excursion of a flangeless tape path for calibrating a tape drive. Additional systems are also presented.

摘要翻译： 根据一个实施例的伺服系统包括至少一个伺服传感器，用于相对于纵向带的至少一个限定的伺服轨道感测磁头的横向位置; 精细致动器，被配置为相对于纵向带横向移动磁头; 粗致动器构造成相对于纵向带横向地平移细致致动器; 和伺服控制。 伺服控制被配置为执行可用于估计用于校准磁带驱动器的无法兰磁带路径的侧向磁带偏移的中点的各种操作。 还介绍了其他系统。

公开(公告)号：US20140063635A1

公开(公告)日：2014-03-06

申请号：US13597138

申请日：2012-08-28

申请人： Randy C. Inch ,  Kevin B. Judd

发明人： Randy C. Inch ,  Kevin B. Judd

IPC分类号： G11B15/04

CPC分类号： G11B20/025 ,  G11B5/00826 ,  G11B5/09 ,  G11B5/584 ,  G11B20/10388 ,  G11B20/10472 ,  G11B2220/90

摘要： A data storage system according to one embodiment includes a head; a drive mechanism for passing a medium over the head; and a controller electrically coupled to the head. The system calculates a kurtosis value, using the current position error signal sample or derivative thereof, and adjusts a threshold value using the kurtosis value. The standard deviation or variance is compared to the threshold value, and writing is enabled when the standard deviation or variance does not exceed the threshold value.

摘要翻译： 根据一个实施例的数据存储系统包括头部; 用于使介质通过头部的驱动机构; 以及电耦合到头部的控制器。 系统使用当前位置误差信号样本或其导数计算峰度值，并使用峰度值调整阈值。 将标准偏差或方差与阈值进行比较，并且当标准偏差或方差不超过阈值时启用写入。

公开(公告)号：US08810939B2

公开(公告)日：2014-08-19

申请号：US13597138

申请日：2012-08-28

申请人： Randy C. Inch ,  Kevin B. Judd

发明人： Randy C. Inch ,  Kevin B. Judd

IPC分类号： G11B27/36 ,  G11B21/02

CPC分类号： G11B20/025 ,  G11B5/00826 ,  G11B5/09 ,  G11B5/584 ,  G11B20/10388 ,  G11B20/10472 ,  G11B2220/90

摘要： A data storage system according to one embodiment includes a head; a drive mechanism for passing a medium over the head; and a controller electrically coupled to the head. The system calculates a kurtosis value, using the current position error signal sample or derivative thereof, and adjusts a threshold value using the kurtosis value. The standard deviation or variance is compared to the threshold value, and writing is enabled when the standard deviation or variance does not exceed the threshold value.

摘要翻译： 根据一个实施例的数据存储系统包括头部; 用于使介质通过头部的驱动机构; 以及电耦合到头部的控制器。 系统使用当前位置误差信号样本或其导数计算峰度值，并使用峰度值调整阈值。 将标准偏差或方差与阈值进行比较，并且当标准偏差或方差不超过阈值时启用写入。

公开(公告)号：US08687314B2

公开(公告)日：2014-04-01

申请号：US13484176

申请日：2012-05-30

申请人： Nhan X. Bui ,  Reed A. Hancock ,  Randy C. Inch

发明人： Nhan X. Bui ,  Reed A. Hancock ,  Randy C. Inch

IPC分类号： G11B5/584

CPC分类号： G11B21/103 ,  G11B5/584

摘要： According to one embodiment, a method includes sensing a first servo sensor while a longitudinal tape is moved in a first direction; determining position error between the magnetic head and a desired position related to the at least one defined servo track; providing signals to operate a fine actuator to translate the magnetic head laterally in a manner to reduce the determined position error; calculating a first average position of the magnetic head for at least one first run-out cycle while the longitudinal tape is moved in the first direction; calculating a first offset of the magnetic head while the longitudinal tape is moved in the first direction; operating a coarse actuator to position the coarse actuator substantially at a target position using the first offset and the first average position.

摘要翻译： 根据一个实施例，一种方法包括在纵向带沿第一方向移动时感测第一伺服传感器; 确定所述磁头与与所述至少一个限定的伺服磁道相关的期望位置之间的位置误差; 提供信号以操作精细致动器以以减少所确定的位置误差的方式横向地转动磁头; 当所述纵向带沿所述第一方向移动时，计算所述磁头的至少一个第一偏移周期的第一平均位置; 当所述纵向带沿所述第一方向移动时计算所述磁头的第一偏移; 操作粗略致动器以使用第一偏移和第一平均位置将粗调制器基本上定位在目标位置。

公开(公告)号：US20140063650A1

公开(公告)日：2014-03-06

申请号：US13600069

申请日：2012-08-30

申请人： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

发明人： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

IPC分类号： G11B15/32 ,  G11B5/584 ,  G11B15/46

CPC分类号： G11B15/32 ,  G11B5/584 ,  G11B15/46

摘要： A method according to one embodiment includes selecting an initial radius value (Rfull) for an outgoing reel, where Rfull is the initial radius of a tape on the outgoing reel; unwinding the tape from the outgoing reel; computing a radius value of the tape on the outgoing reel during the unwinding; adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position; and outputting the adjusted computed radius. A method according to another embodiment includes selecting an initial radius value (R0) for an incoming reel, where R0 is the initial radius of the incoming reel; winding the tape onto the incoming reel; computing a radius value of the tape on the incoming reel during the winding; adjusting the computed radius with an offset calculated from a direct measurement of velocity from the tape position; and outputting the adjusted computed radius.

摘要翻译： 根据一个实施例的方法包括为输出卷轴选择初始半径值（Rfull），其中Rfull是输出卷轴上的带的初始半径; 从出纸卷轴上取出胶带; 在展开期间计算输出卷轴上的胶带的半径值; 利用从带位置直接测量速度计算的偏移来调整计算出的半径; 并输出调整后的计算半径。 根据另一实施例的方法包括：对于输入卷轴选择初始半径值（R0），其中R0是输入卷轴的初始半径; 将胶带卷绕到进纸卷轴上; 在卷绕期间计算进纸卷轴上的胶带的半径值; 利用从带位置直接测量速度计算的偏移来调整计算出的半径; 并输出调整后的计算半径。

公开(公告)号：US20120307401A1

公开(公告)日：2012-12-06

申请号：US13152238

申请日：2011-06-02

申请人： Nhan X. Bui ,  Reed A. Hancock ,  Randy C. Inch

发明人： Nhan X. Bui ,  Reed A. Hancock ,  Randy C. Inch

IPC分类号： G11B5/584

CPC分类号： G11B21/103 ,  G11B5/584

摘要： A servo system according to one embodiment includes at least one servo sensor for sensing a lateral position of a magnetic head with respect to at least one defined servo track of a longitudinal tape; a fine actuator configured to translate the magnetic head laterally with respect to the longitudinal tape; a coarse actuator configured to translate the fine actuator laterally with respect to the longitudinal tape; and a servo control. The servo control is configured to perform various operations that may be used to estimate a midpoint of lateral tape excursion of a flangeless tape path for calibrating a tape drive. Additional systems are also presented.

摘要翻译： 根据一个实施例的伺服系统包括至少一个伺服传感器，用于相对于纵向带的至少一个限定的伺服轨道感测磁头的横向位置; 精细致动器，被配置为相对于纵向带横向移动磁头; 粗致动器构造成相对于纵向带横向地平移细致致动器; 和伺服控制。 伺服控制被配置为执行可用于估计用于校准磁带驱动器的无法兰磁带路径的侧向磁带偏移的中点的各种操作。 还介绍了其他系统。