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公开(公告)号：US06318176B1
公开(公告)日：2001-11-20
申请号：US09535026
申请日：2000-03-24
IPC分类号： G01P1511
CPC分类号： G01P15/11 , G01P15/0888
摘要： An inductive rotational accelerometer for assisting in servo control of a hard disc drive using a torsional mass-spring system in combination with an inductance sensitive circuit to detect and measure the rotational vibrations imposed on a hard disc drive. The inductive rotational accelerometer includes a frame member coupled to the disc drive, the frame member supporting a pin on which is disposed a rotational mass. The rotational mass supports conductive blocks which with the rotational mass and the frame member provide a path for inductance.
摘要翻译： 一种感应旋转加速度计，用于使用扭转质量弹簧系统与电感敏感电路组合来辅助硬盘驱动器的伺服控制，以检测和测量施加在硬盘驱动器上的旋转振动。 感应旋转加速度计包括耦合到盘驱动器的框架构件，框架构件支撑在其上设置有旋转块的销。 旋转质量支撑导电块，其随着旋转质量和框架构件提供电感路径。
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2.发明授权
公开(公告)号：US5835300A
公开(公告)日：1998-11-10
申请号：US791349
申请日：1997-01-30
CPC分类号： G11B21/106 , G11B21/083 , G11B5/5526 , G11B5/59627 , G11B5/59688
摘要： Method and apparatus for compensating for errors in the location of servo frames in a disc drive, the servo frames providing control inputs to a servo loop of the disc drive. Each servo frame includes an additional compensation field to which a compensation term is written, the compensation term indicative of the average radial error in the location of the servo frame. The compensation term is determined by measuring the radial distance between adjacent servo frames over a plurality of revolutions of the disc and averaging these measured radial distances. The compensation terms are thereafter used in conjunction with position information from the servo frames to control the position of the head. The compensation term facilitates the elimination of repeatable, random errors in the locations of the servo frames, causing the head to nominally follow a circular path about the disc, regardless of the errors in the locations of the servo frames.
摘要翻译： 用于补偿磁盘驱动器中的伺服帧的位置中的错误的方法和装置，所述伺服帧向盘驱动器的伺服环提供控制输入。 每个伺服帧包括写入补偿项的附加补偿场，表示伺服帧位置的平均径向误差的补偿项。 补偿项是通过在盘的多圈中测量相邻伺服帧之间的径向距离来确定的，并平均这些测量的径向距离。 补偿项随后与来自伺服帧的位置信息一起使用，以控制头部的位置。 补偿项有助于在伺服帧的位置消除可重复的随机误差，导致磁头名义上遵循围绕磁盘的圆形路径，而不管伺服帧的位置中的错误。
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3.发明申请公开(公告)号：US20080278841A1
公开(公告)日：2008-11-13
申请号：US11931623
申请日：2007-10-31
IPC分类号： G11B15/46
CPC分类号： G11B5/5526
摘要： Various embodiments relate to selectively inhibiting output from a transducer in response to the rate of change of acceleration that is experienced by the transducer. The rate of change of an acceleration signal, which is indicative of transducer's acceleration, is detected. Output of a signal through the transducer is selectively inhibited in response to the detected rate of change of the acceleration signal.A related apparatus can include a circuit that detects the rate of change of an acceleration signal and generates a transducer output inhibit signal in response to the detected rate of change of the acceleration signal. Another related apparatus can include a transducer, an accelerometer, and a circuit. The transducer writes data on a recordable media. The accelerometer generates an acceleration signal that is indicative of transducer vibration. The circuit selectively inhibits writing of data through the transducer in response to a rate of change of the acceleration signal.
摘要翻译： 各种实施例涉及响应于换能器经历的加速度的变化率来选择性地抑制来自换能器的输出。 检测表示换能器加速度的加速度信号的变化率。 响应于检测到的加速度信号的变化率，选择性地禁止通过换能器的信号的输出。 相关装置可以包括检测加速度信号的变化率的电路，并且响应于检测到的加速度信号的变化率而产生换能器输出禁止信号。 另一相关设备可以包括换能器，加速度计和电路。 传感器将数据写入可记录介质。 加速度计产生一个表示换能器振动的加速度信号。 该电路响应于加速度信号的变化率选择性地抑制通过换能器的数据写入。
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4.发明授权公开(公告)号：US06570733B1
公开(公告)日：2003-05-27
申请号：US09070580
申请日：1998-04-30
IPC分类号： G11B5596
CPC分类号： G11B5/5556
摘要： A method and apparatus are disclosed for improving seek performance of a disc drive through adaptive servo gain adjustment. The disc drive comprises a head adjacent a rotatable disc and a servo circuit which controllably positions the head adjacent tracks defined on the disc. During a seek operation in which the servo circuit moves the head from an initial track to a destination track, the servo circuit accumulates a velocity error as a sum of a series of velocity errors each obtained as a difference between an actual velocity of the head and a corresponding desired velocity over a selected radial distance of the disc. The servo circuit additionally measures an elapsed time for the head to pass over a second selected radial distance of the disc as the head is decelerated toward the destination track. Thereafter, the servo circuit adjusts a gain of the servo circuit in relation to the accumulated velocity error and the measured elapsed time.
摘要翻译： 公开了一种通过自适应伺服增益调整改善磁盘驱动器的寻道性能的方法和装置。 盘驱动器包括与可旋转盘相邻的头部和可控地将头部定位在盘上限定的轨迹的伺服电路。 在伺服电路将磁头从初始轨道移动到目的地轨道的寻道操作期间，伺服电路将速度误差累积为一系列速度误差的和，每个速度误差各自作为头部的实际速度和 在盘的选定的径向距离上的相应的期望速度。 伺服电路另外测量当磁头向目的磁道减速时磁头经过盘的第二选定径向距离的经过时间。 此后，伺服电路相对于累积的速度误差和测量的经过时间来调节伺服电路的增益。
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公开(公告)号：US07936532B2
公开(公告)日：2011-05-03
申请号：US11931623
申请日：2007-10-31
IPC分类号： G11B15/46
CPC分类号： G11B5/5526
摘要： Various embodiments relate to selectively inhibiting output from a transducer in response to the rate of change of acceleration that is experienced by the transducer. The rate of change of an acceleration signal, which is indicative of transducer's acceleration, is detected. Output of a signal through the transducer is selectively inhibited in response to the detected rate of change of the acceleration signal. A related apparatus can include a circuit that detects the rate of change of an acceleration signal and generates a transducer output inhibit signal in response to the detected rate of change of the acceleration signal. The transducer writes data on a recordable media. The accelerometer generates an acceleration signal that is indicative of transducer vibration. The circuit selectively inhibits writing of data through the transducer in response to a rate of change of the acceleration signal.
摘要翻译： 各种实施例涉及响应于换能器经历的加速度的变化率来选择性地抑制来自换能器的输出。 检测表示换能器加速度的加速度信号的变化率。 响应于检测到的加速度信号的变化率，选择性地禁止通过换能器的信号的输出。 相关装置可以包括检测加速度信号的变化率的电路，并且响应于检测到的加速度信号的变化率而产生换能器输出禁止信号。 传感器将数据写入可记录介质。 加速度计产生一个表示换能器振动的加速度信号。 该电路响应于加速度信号的变化率选择性地抑制通过换能器的数据写入。
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公开(公告)号：US06643080B1
公开(公告)日：2003-11-04
申请号：US09626029
申请日：2000-07-27
IPC分类号： G11B2736
CPC分类号： G11B21/02 , G11B25/043 , G11B33/08
摘要： Method and apparatus for identifying a resonance by changing a spindle speed, which has the effect of changing a corresponding sampling rate and Nyquist frequency. The invention discriminates (1) between plausible frequencies of true resonance and/or (2) aliased resonance from non-aliased resonances. This is accomplished by monitoring whether and/or how a resonance shifts during this speed change. Methods of the present invention monitor resonances by deriving a resonance indicator such as an apparent frequency (below the Nyquist frequency), a gain or error magnitude (compared to a derived threshold at a calculated frequency of interest), or similar criteria tested by values conventionally illustrated on a Bode plot. The present invention further includes steps or structural features for configuring a controller to attenuate or similarly limit an unwanted frequency component of an actuator control signal. In this way, resonances in the actuator can be reduced, and servo speed and accuracy thereby enhanced.
摘要翻译： 通过改变主轴转速来识别共振的方法和装置，其具有改变对应采样率和奈奎斯特频率的效果。 本发明鉴别（1）真正谐振的合理频率和/或（2）来自非锯齿波共振的混叠谐振。 这是通过监测在此速度变化期间谐振是否变化和/或如何发生变化来实现的。 本发明的方法通过导出诸如表观频率（低于奈奎斯特频率）的谐振指示器，增益或误差幅度（与感兴趣的计算频率下的导出阈值相比较）或通过常规值测试的类似标准来监测共振 在波德图上说明。 本发明还包括用于配置控制器以衰减或类似地限制致动器控制信号的不期望频率分量的步骤或结构特征。 以这种方式，可以降低致动器中的谐振，从而提高伺服速度和精度。
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