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    VIBRATION DISTURBANCE ESTIMATION AND CONTROL
    5.
    发明公开
    VIBRATION DISTURBANCE ESTIMATION AND CONTROL 审中-公开
    振动故障测量和调节

    公开(公告)号：EP2862170A1

    公开(公告)日：2015-04-22

    申请号：EP13806537.0

    申请日：2013-06-18

    申请人： International Business Machines Corporation

    发明人： PANTAZI, Angeliki ,  BUI, Nhan Xuan ,  JELITTO, Jens

    IPC分类号： G11B5/584 ,  G11B5/008

    CPC分类号： G11B5/584

    摘要： A tape drive configured to accurately position a head actuator in the presence of physical disturbances is disclosed. The tape drive includes a track-follow controller to position a head actuator over data tracks on magnetic tape. The tape drive further includes a disturbance observer configured to estimate a vibration disturbance and output a compensation signal to assist the track- follow controller to accurately position the head actuator over the data tracks in the presence of vibration. When estimating the vibration disturbance, the disturbance observer takes into account vibration frequency characteristics, such as frequency characteristics derived from a vibration specification associated with the tape drive, or frequency characteristics derived from known vibration disturbances experienced by the tape drive. A corresponding method is also disclosed.

    POSITIONING COARSE SERVO ACTUATOR OF TAPE SERVO SYSTEM TO ALLOW FINE SERVO ACTUATOR TO FOLLOW TAPE SHIFT EXCURSIONS
    7.
    发明公开
    POSITIONING COARSE SERVO ACTUATOR OF TAPE SERVO SYSTEM TO ALLOW FINE SERVO ACTUATOR TO FOLLOW TAPE SHIFT EXCURSIONS 有权
    定位伺服系统的伺服执行机构，使精密伺服执行机构能够遵循带式换档机构

    公开(公告)号：EP2433281A1

    公开(公告)日：2012-03-28

    申请号：EP10755120.2

    申请日：2010-08-31

    申请人： International Business Machines Corporation

    发明人： HANCOCK, Reed, Alan ,  BUI, Nhan, Xuan ,  PANTAZI, Angeliki ,  ARGUMENDO, Armando, Jesus ,  JUSTO, Roger, Javier

    IPC分类号： G11B5/584

    CPC分类号： G11B5/584

    摘要： Methods, servo systems, and data storage drives follow the lateral shift excursions of longitudinal tape, for example, from flangeless tape guides. A servo sensor is configured to sense lateral position of a tape head with respect to longitudinal servo tracks of the tape, a fine actuator is configured to translate the head laterally, and a coarse actuator is configured to translate the fine actuator laterally. Position error is determined between the head and a desired position related to the servo track, and the fine actuator operated to translate the head laterally to reduce the position error. In the embodiment, lateral shift excursion is sensed from the position error, and the coarse actuator is positioned substantially at a midpoint of the lateral shift excursion. Thus, the fine actuator follows the lateral shift excursions, while the coarse actuator remains at the midpoint.

    摘要翻译： 方法，伺服系统和数据存储驱动器遵循纵向磁带的横向移动偏移，例如，来自无法兰磁带导向器的横向偏移。 伺服传感器被配置为感测带头相对于带的纵向伺服轨道的横向位置，精致致动器被配置为横向平移头，并且粗致动器被配置为横向平移精致致动器。 位置误差在磁头和与伺服磁道相关的所需位置之间确定，并且微调执行器用于横向平移磁头以减小位置误差。 在该实施例中，从位置误差感测横向偏移偏移，并且粗略致动器大体上定位在横向偏移偏移的中点。 因此，精调致动器遵循侧移偏移，而粗调致动器保持在中点。