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公开(公告)号：US08405926B2
公开(公告)日：2013-03-26
申请号：US12842938
申请日：2010-07-23
申请人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
摘要： In accordance with the present invention, a method of operating a magnetic tape drive, a magnetic tape drive and a servo control system are provided for obtaining and maintaining velocity control in a magnetic tape drive. In one embodiment, a method is provided for operating a magnetic tape drive. The tape drive includes a plurality of DC motors, and each DC motor has a plurality of Hall sensors. The DC motors are under the control of a servo system which is configured to read location information from the magnetic tape, and compute a primary tape velocity from the location information, and sense a secondary and tertiary velocity signal and compute a tape velocity based on one of the sensed secondary velocity signal and tertiary velocity. The method includes detecting if the primary velocity location information is available. In response to detecting that the primary velocity location information is available the primary velocity is employed to control the servo system. In response to detecting the primary velocity location information is unavailable then one of a secondary or a tertiary velocity signal is employed. The secondary velocity signal is employed when an absolute value of a term related to tape velocity is less than a predetermined value. The tertiary velocity signal is employed when the absolute value of the term related to tape velocity is greater than the predetermined value.
摘要翻译： 根据本发明，提供了一种操作磁带驱动器，磁带驱动器和伺服控制系统的方法，用于获得和维持磁带驱动器中的速度控制。 在一个实施例中，提供了一种用于操作磁带驱动器的方法。 磁带驱动器包括多个DC电动机，并且每个DC电动机具有多个霍尔传感器。 直流电动机处于伺服系统的控制之下，伺服系统被配置为从磁带读取位置信息，并从位置信息计算主带速度，并感测二次和三次速度信号，并基于一个速度信号计算磁带速度 的感测二次速度信号和三次速度。 该方法包括检测主速度位置信息是否可用。 响应于检测到主速度位置信息可用，主速度被用于控制伺服系统。 响应于检测到主速度位置信息不可用，则采用次速或三速信号中的一个。 当与磁带速度相关的项的绝对值小于预定值时，采用二次速度信号。 当与磁带速度相关的项的绝对值大于预定值时，采用三次速度信号。
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公开(公告)号：US20120019953A1
公开(公告)日：2012-01-26
申请号：US12842938
申请日：2010-07-23
申请人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
IPC分类号： G11B19/02
摘要： In accordance with the present invention, a method of operating a magnetic tape drive, a magnetic tape drive and a servo control system are provided for obtaining and maintaining velocity control in a magnetic tape drive. In one embodiment, a method is provided for operating a magnetic tape drive. The tape drive includes a plurality of DC motors, and each DC motor has a plurality of Hall sensors. The DC motors are under the control of a servo system which is configured to read location information from the magnetic tape, and compute a primary tape velocity from the location information, and sense a secondary and tertiary velocity signal and compute a tape velocity based on one of the sensed secondary velocity signal and tertiary velocity. The method includes detecting if the primary velocity location information is available. In response to detecting that the primary velocity location information is available the primary velocity is employed to control the servo system. In response to detecting the primary velocity location information is unavailable then one of a secondary or a tertiary velocity signal is employed. The secondary velocity signal is employed when an absolute value of a term related to tape velocity is less than a predetermined value. The tertiary velocity signal is employed when the absolute value of the term related to tape velocity is greater than the predetermined value.
摘要翻译： 根据本发明，提供了一种操作磁带驱动器，磁带驱动器和伺服控制系统的方法，用于获得和维持磁带驱动器中的速度控制。 在一个实施例中，提供了一种用于操作磁带驱动器的方法。 磁带驱动器包括多个DC电动机，并且每个DC电动机具有多个霍尔传感器。 直流电动机处于伺服系统的控制之下，伺服系统被配置为从磁带读取位置信息，并从位置信息计算主带速度，并感测二次和三次速度信号，并基于一个速度信号计算磁带速度 的感测二次速度信号和三次速度。 该方法包括检测主速度位置信息是否可用。 响应于检测到主速度位置信息可用，主速度被用于控制伺服系统。 响应于检测到主速度位置信息不可用，则采用次速或三速信号中的一个。 当与磁带速度相关的项的绝对值小于预定值时，采用二次速度信号。 当与磁带速度相关的项的绝对值大于预定值时，采用三次速度信号。
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33.发明授权Setting edge stress signal in magnetic tape data storage cartridge memory in response to servo detection error signals 有权响应于伺服检测错误信号，在磁带数据存储盒存储器中设置边沿应力信号公开(公告)号：US07929243B2
公开(公告)日：2011-04-19
申请号：US12367315
申请日：2009-02-06
IPC分类号： G11B5/584
CPC分类号： G11B5/584 , G11B5/00813
摘要： Methods, magnetic tape data storage drives, data storage systems, and magnetic tape data storage cartridges. A system having at least one magnetic tape data storage drive is configured to handle a magnetic tape cartridge comprising a magnetic tape data storage media and accompanying cartridge memory. The magnetic tape media comprises a plurality of longitudinal servo bands, the servo bands separated by data bands. Two servo bands, each at opposite sides of a data band are sensed. In response to at least one servo detection error signal of one of the two servo bands, an edge stress signal is set to the cartridge memory of the magnetic tape cartridge. Then, for example, after reloading the cartridge, the cartridge memory is inspected for a set edge stress signal; and, if the edge stress signal is set, only read operations are allowed with respect to the inspected magnetic tape data storage cartridge.
摘要翻译： 方法，磁带数据存储驱动器，数据存储系统和磁带数据存储盒。 具有至少一个磁带数据存储驱动器的系统被配置为处理包括磁带数据存储介质和附带的盒存储器的磁带盒。 磁带介质包括多个纵向伺服带，伺服带由数据带分隔开。 感测到两个伺服带，每个在数据带的相对侧。 响应于两个伺服带中的一个的至少一个伺服检测误差信号，将边缘应力信号设置到磁带盒的盒存储器。 然后，例如，在重新加载盒之后，检查盒存储器的设定边缘应力信号; 并且如果设置了边缘应力信号，则只能对被检查的磁带数据存储盒进行读取操作。
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34.发明授权Tape cartridge having tape media with longitudinally shifted servo pattern for increased sampling rate 有权磁带盒具有带有纵向移位伺服模式的磁带介质，以提高采样速率公开(公告)号：US07903368B2
公开(公告)日：2011-03-08
申请号：US12024127
申请日：2008-02-01
申请人： Nhan Xuan Bui , Reed Alan Hancock , Eiji Ogura , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Reed Alan Hancock , Eiji Ogura , Kazuhiro Tsuruta
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： A magnetic tape cartridge including magnetic tape with servo information is provided. The servo information comprises a plurality of parallel longitudinal servo bands that lie between a plurality of longitudinal data bands. The plurality of servo bands include odd servo bands and even servo bands, wherein each of the odd servo bands lie between each of the even servo bands. Each of the plurality servo bands include a plurality of frames, wherein each frame includes a plurality of bursts of transition stripes, and each burst having a first transition stripe. The first transition stripe of each burst of each the odd servo band is longitudinally shifted from the first transition stripe of each burst of each even servo band by a substantially equal distance, D, such that servo information of the odd servo bands is interleaved with the servo information from the even servo bands.
摘要翻译： 提供一种包括具有伺服信息的磁带的磁带盒。 伺服信息包括位于多个纵向数据带之间的多个并行纵向伺服带。 多个伺服频带包括奇数伺服频带和偶数伺服频带，其中奇数伺服频带中的每一个位于每个偶数伺服频带之间。 多个伺服频带中的每一个包括多个帧，其中每个帧包括多个过渡条纹脉冲串，并且每个脉冲串具有第一过渡条带。 每个奇数伺服频带的每个脉冲串的第一个转移条纹从每个偶数伺服频带的每个脉冲串的第一转移条带纵向偏移大致相等的距离D，使得奇数伺服带的伺服信息与 来自偶数伺服带的伺服信息。
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公开(公告)号：US07649710B2
公开(公告)日：2010-01-19
申请号：US12028676
申请日：2008-02-08
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： In one embodiment, a tape read/write head supported by a lever is biased in a first position, using magnetic attraction between a magnet supported by the lever, and a return path structure of magnetically permeable material. In the illustrated embodiment, the magnet centers itself, in the absence of a coil generated magnetic field, in the middle of a gap of the magnetic return path structure. In one aspect, the mass of the read/write head and one side of the lever may be balanced by the mass of the magnet and the other side of the lever. The lever and hence the tape read/write head carried by the lever, may be pivoted by conducting current through a coil to generate a magnetic field which is conducted by the return path structure to interact with the magnetic field of the magnet. As a consequence, the lever pivots on a pivot axis as a function of the magnitude and direction of the current through the coil. The face of the magnet may be divided into portions of opposite magnetic polarity to facilitate a relatively pure torque to be developed substantially without a net force. Other embodiments are described and claimed.
摘要翻译： 在一个实施例中，由杠杆支撑的磁带读/写磁头通过使用由杠杆支撑的磁体之间的磁吸引力和导磁材料的返回路径结构而被偏置在第一位置。 在所示的实施例中，磁体在没有线圈产生的磁场的情况下自身中心位于磁返回路径结构的间隙的中间。 在一个方面，读/写头的质量和杠杆的一侧可以由磁体的质量和杠杆的另一侧平衡。 由杠杆承载的杆和因此的带读/写头可以通过传导电流通过线圈来枢转，以产生由返回路径结构传导以与磁体的磁场相互作用的磁场。 因此，杠杆作为通过线圈的电流的大小和方向的作用在枢轴上枢转。 磁体的表面可以被分成相反磁极的部分，以促进基本上没有净力显着地发展相对纯的扭矩。 描述和要求保护其他实施例。
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公开(公告)号：US20090206190A1
公开(公告)日：2009-08-20
申请号：US12032420
申请日：2008-02-15
IPC分类号： B65H23/198
摘要： Dynamic calibration of a secondary velocity signal is provided in a tape drive. In one example, a reel motor is operated to drive a reel carrying a tape in a tape drive. The motion of the tape is measured to provide a measured primary velocity signal of the tape, and in addition, the operation of the reel motor is measured to provide an estimated secondary velocity signal of the tape as a function of motor parameters and the motor operation measurements. The estimated secondary velocity signal of the tape may be calibrated as the tape is driven, as a function of the tape motion measurements and the motor operation measurements. Other embodiments are described and claimed.
摘要翻译： 在磁带驱动器中提供二次速度信号的动态校准。 在一个示例中，操作卷轴马达以驱动在磁带驱动器中携带磁带的卷轴。 测量带的运动以提供带的测量的一次速度信号，此外，测量卷轴电动机的操作以根据电动机参数和电动机操作提供带的估计二次速度信号 测量。 根据磁带运动测量和电机运行测量，磁带的估计二次速度信号可以根据磁带的驱动进行校准。 描述和要求保护其他实施例。
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公开(公告)号：US09059658B2
公开(公告)日：2015-06-16
申请号：US12202854
申请日：2008-09-02
申请人： Allen Keith Bates , Nhan Xuan Bui , Reed Alan Hancock , Wayne Isami Imaino , Daniel James Winarski
发明人： Allen Keith Bates , Nhan Xuan Bui , Reed Alan Hancock , Wayne Isami Imaino , Daniel James Winarski
摘要： An apparatus for controlling an electric motor is provided. A plurality of switches is provided for controlling a direction of current through motor coils of the electric motor. A brushless motor control circuit is connected to each of the plurality of switches. Responsive to a request to adjust one of an angular velocity and an angular acceleration of the electric motor, the plurality of switches are activated to place the motor coils in a predetermined configuration to maximize torque or reduce a total back electromotive force (BEMF) from the motor coils.
摘要翻译： 提供一种用于控制电动机的装置。 提供多个开关，用于控制电动机的电动机线圈的电流方向。 无刷电机控制电路连接到多个开关中的每一个。 响应于调整电动机的角速度和角加速度之一的请求，多个开关被激活，以将电动机线圈放置在预定的配置中以使转矩最大化或者减小总反向电动势（BEMF） 电机线圈。
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38.发明授权公开(公告)号：US08988031B2
公开(公告)日：2015-03-24
申请号：US13614915
申请日：2012-09-13
CPC分类号： H02P25/18 , H02P23/20 , H02P25/188 , H02P27/08
摘要： A calculation function, which optimizes a dynamic reconfiguration-switching of motor windings between winding-configurations, is dynamically configured. Acceleration is traded off in favor of higher velocity upon detecting the electric motor is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity.
摘要翻译： 动态配置了优化绕组配置之间电动机绕组的动态重新配置切换的计算功能。 在检测到电动机处于最佳角速度以切换到最佳的较低转矩常数和电压常数时，加速度被偏离为有利于更高的速度。 总反向电动势（BEMF）被禁止禁止进一步加速到更高的角速度。
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39.发明授权Dynamic reconfiguration-switching of windings in an electric motor in an electric vehicle 有权在电动车辆中的电动机中的绕组的动态重新配置切换公开(公告)号：US08981696B2
公开(公告)日：2015-03-17
申请号：US13614925
申请日：2012-09-13
摘要： Dynamic reconfiguration-switching of motor windings in an electric motor in an electric vehicle is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting the electric motor in the electric vehicle is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity.
摘要翻译： 在电动车辆中的电动机中的电动机绕组的动态重新配置切换在绕组配置之间被优化。 在检测到电动车辆中的电动机处于最佳角速度以切换到最佳的较低转矩常数和电压常数的情况下，有利于较高速度的加速度被消除。 总反向电动势（BEMF）被禁止禁止进一步加速到更高的角速度。
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40.发明授权公开(公告)号：US08981695B2
公开(公告)日：2015-03-17
申请号：US13614905
申请日：2012-09-13
摘要： Dynamic reconfiguration-switching of motor windings is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting a brushless DC motor is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity.
摘要翻译： 电机绕组的动态重新配置切换在绕组配置之间进行了优化。 在检测到无刷直流电动机处于最佳角速度以切换到最佳的较低转矩常数和电压常数的情况下，加速度被偏移以支持更高的速度。 总反向电动势（BEMF）被禁止禁止进一步加速到更高的角速度。
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