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1.发明授权Disk drive with feed-forward control path that receives a reference position signal to apply a feed-forward command effort at a rate greater than a servo sampling rate 有权具有前馈控制路径的磁盘驱动器，其接收参考位置信号以以大于伺服采样率的速率施加前馈命令工作公开(公告)号：US06614618B1
公开(公告)日：2003-09-02
申请号：US09538931
申请日：2000-03-31
申请人： Edgar D. Sheh , Thao P. Trieu , Ara W. Nazarian , Richard K. Wong
发明人： Edgar D. Sheh , Thao P. Trieu , Ara W. Nazarian , Richard K. Wong
IPC分类号： G11B5596
CPC分类号： G11B5/59633 , G11B5/5521
摘要： Disclosed is a disk drive having a plant with a moveable transducer and a servo controller that more precisely controls the transducer during short to medium seeks by producing a multi-rate feed-forward command effort signal. The servo controller includes a reference position generator that provides a reference position signal that varies as a function of time along a shaped position profile for moving the transducer from a start position to a target position in a smoothly controlled fashion, a feed-forward control path that receives the reference position signal and applies a feed-forward command effort signal at a feed-forward rate that is greater than the servo sampling rate to move the actuator more closely along the shaped position profile between servo samples; and a feedback control path that receives the reference position signal and the indicated position signal and applies a feedback command effort signal at the servo sampling rate based on a difference between the reference position signal and the indicated position signal to make minor corrections to error remaining after application of prior feed-forward command effort signals.
摘要翻译： 公开了具有具有可移动换能器和伺服控制器的设备的磁盘驱动器，其通过产生多速率前馈命令工作信号来在短到中等搜索期间更精确地控制换能器。 该伺服控制器包括一个参考位置发生器，该基准位置发生器提供一个参考位置信号，该基准位置信号沿着一个成形位置轮廓作为时间的函数变化，用于以平滑控制的方式将换能器从起始位置移动到目标位置;前馈控制路径 其接收参考位置信号并且以大于伺服采样速率的前馈速率施加前馈命令努力信号，以沿着伺服样本之间的成形位置分布更紧密地移动致动器; 以及反馈控制路径，其接收参考位置信号和所指示的位置信号，并且基于参考位置信号和指示位置信号之间的差以伺服采样率施加反馈命令努力信号，以对 应用先前的前馈命令工作信号。
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2.发明授权Compensating for repeatable phase error when servo writing a disk drive from spiral tracks 有权当从螺旋轨道写入磁盘驱动器时补偿可重复的相位误差公开(公告)号：US07391584B1
公开(公告)日：2008-06-24
申请号：US11593929
申请日：2006-11-07
申请人： Edgar D. Sheh , Yilin Cai
发明人： Edgar D. Sheh , Yilin Cai
CPC分类号： G11B5/59627 , G11B5/59644 , G11B5/59661 , G11B20/10037 , G11B20/10222 , G11B20/1403 , G11B2020/1282 , G11B2020/1287
摘要： A method of servo writing a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted periodically by a sync mark. A timing recovery measurement is generated in response to the sync marks, wherein the timing recovery measurement comprises a sinusoidal component. A timing compensation value is generated in response to the sync marks which estimates the sinusoidal component in the timing recovery measurement. A frequency control signal is generated in response to the timing recovery measurement and the timing compensation value, a servo write clock is generated in response to the frequency control signal, and the servo write clock and the head internal to the disk drive are used to write the product servo sectors to the disk.
摘要翻译： 公开了一种伺服写磁盘驱动器盘的方法。 盘包括多个螺旋轨道，其中每个螺旋轨道包括由同步标记周期性地中断的高频信号。 响应于同步标记产生定时恢复测量，其中定时恢复测量包括正弦分量。 响应于在定时恢复测量中估计正弦分量的同步标记产生定时补偿值。 响应于定时恢复测量和定时补偿值产生频率控制信号，响应于频率控制信号产生伺服写入时钟，并且使用伺服写入时钟和磁盘驱动器内部的磁头写入 产品伺服扇区到磁盘。
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公开(公告)号：US08634154B1
公开(公告)日：2014-01-21
申请号：US13204918
申请日：2011-08-08
IPC分类号： G11B5/09
CPC分类号： G11B5/59661 , G11B5/59666
摘要： A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. A bootstrap spiral track is written to the disk, wherein the bootstrap spiral track comprises a high frequency signal interrupted by sync marks. A first sync mark is written while writing a first part of the bootstrap spiral track, and a second sync mark is written while writing a second part of the bootstrap spiral track. A switch between writing the first sync mark and the second sync mark is made in response to a spindle BEMF voltage, thereby generating a sync mark seam in the bootstrap spiral track.
摘要翻译： 公开了一种磁盘驱动器，其包括在盘上致动的磁头，以及可操作以旋转磁盘的主轴电机。 引导螺旋轨迹被写入盘，其中自举螺旋轨道包括由同步标记中断的高频信号。 在写入自举螺旋轨道的第一部分时写入第一同步标记，并且在写入自举螺旋轨道的第二部分时写入第二同步标记。 响应于主轴BEMF电压进行写入第一同步标记和第二同步标记之间的切换，从而在自举螺旋轨道中产生同步标记接缝。
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4.发明授权Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks 失效当伺服从螺旋轨道写入磁盘驱动器时，通过改变PES算法来调整轨道密度公开(公告)号：US07068459B1
公开(公告)日：2006-06-27
申请号：US10946462
申请日：2004-09-20
CPC分类号： G11B5/59633 , G11B5/59638 , G11B5/59661
摘要： A method and apparatus is disclosed for writing product servo sectors to a disk of a disk drive to define a plurality of data tracks. The disk drive comprises the disk and a head actuated over the disk. The disk comprises a plurality of spiral tracks which are read using the head to synchronize a write clock and to generate a position error signal (PES) according to a PES algorithm used to maintain the head along a first servo track while writing product servo sectors along the first servo track. The PES algorithm is adjusted to seek the head to a second servo track, and the head is used to write product servo sectors along the second servo track.
摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘以定义多个数据轨道的方法和装置。 磁盘驱动器包括磁盘和在盘上启动的磁头。 磁盘包括多个螺旋磁道，它们使用磁头读取以同步写时钟，并根据用于沿着第一伺服磁道保持磁头的PES算法产生位置误差信号（PES），同时沿着 第一个伺服轨道。 调整PES算法以寻找头到第二伺服轨道，并且头用于沿着第二伺服轨道写入乘积伺服扇区。
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公开(公告)号：US08634283B1
公开(公告)日：2014-01-21
申请号：US13205034
申请日：2011-08-08
CPC分类号： G11B5/59661 , G11B5/59666
摘要： A disk drive is disclosed comprising a head actuated over a disk, wherein a bootstrap spiral track is written on the disk. While servoing on the bootstrap spiral track at least one circular reference track is written on the disk. A velocity profile is adjusted in response to the circular reference track, and a plurality of spiral tracks are written to the disk in response to the velocity profile.
摘要翻译： 公开了一种磁盘驱动器，其包括在磁盘上启动的磁头，其中自举螺旋磁道被写在磁盘上。 当在自举螺旋轨道上进行伺服时，至少一个圆形参考轨迹被写入磁盘。 响应于圆形参考轨迹调整速度分布，并且响应于速度分布将多个螺旋轨道写入盘。
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6.发明授权Fault tolerant sync mark detection while servo writing a disk drive from spiral tracks 有权伺服从螺旋轨道写入磁盘驱动器时的容错同步标记检测公开(公告)号：US07391583B1
公开(公告)日：2008-06-24
申请号：US11494240
申请日：2006-07-27
申请人： Edgar D. Sheh , Tehri S. Lee
发明人： Edgar D. Sheh , Tehri S. Lee
CPC分类号： G11B5/59616 , G11B5/59644 , G11B5/59661 , G11B20/10037 , G11B20/10222 , G11B20/1403 , G11B2020/1282 , G11B2020/1287
摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. The disk comprises a plurality of spiral tracks, wherein each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The read signal from the head is processed to detect a plurality of the sync marks in a spiral track crossing. A timing recovery measurement is generated in response to a selected one of the sync marks based on reliability metrics, wherein a servo write clock is synchronized in response to the timing recovery measurement. The read signal representing the high frequency signal in the spiral track crossing is processed to generate a position error signal (PES) used to maintain the head along a substantially circular target path while using the servo write clock to write product servo sectors along the circular target path.
摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 盘包括多个螺旋轨道，其中每个螺旋轨道包括以预定间隔被同步标记中断的高频信号。 来自头部的读取信号被处理以在螺旋轨迹交叉中检测多个同步标记。 基于可靠性度量响应于所选择的同步标记中的一个产生定时恢复测量，其中伺服写时钟响应于定时恢复测量而同步。 处理表示螺旋轨迹交叉中的高频信号的读取信号，以产生位置误差信号（PES），该位置误差信号（PES）用于沿着基本圆形的目标路径保持磁头，同时使用伺服写入时钟沿着圆形目标写入乘积伺服扇区 路径。
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7.发明授权Method for transparent switching and controlling optical signals using mirror designs 失效使用镜像设计透明切换和控制光信号的方法公开(公告)号：US06529654B1
公开(公告)日：2003-03-04
申请号：US09847868
申请日：2001-05-02
IPC分类号： G02B626
CPC分类号： G02B6/359 , G02B6/3518 , G02B6/357 , G02B2006/12104
摘要： A method for switching signals using one of a plurality of mirrors in an array structure. The method includes determining an optical path to be formed between an input fiber and an output fiber. The method also includes determining a set of mirrors to be used to form the optical path. The set of mirrors includes at least a first mirror. The first mirror is coupled to a mechanical spring assembly and an actuation assembly. The method captures an analog signal indicative of a spatial position of the first mirror using a position sensing device. The sensing device is coupled to the mirror. The method also converts the signal analog signal into a digital signal. The method processes the digital signal indicative of the spatial position of the mirror using the digital signal processing device to obtain a characteristic of the mirror. The method provides a control signal based upon the characteristic of the mirror. The converts the control signal into an analog control signal. The method uses the analog control signal with the actuation assembly to set a desired position of the first mirror.
摘要翻译： 一种使用阵列结构中的多个反射镜之一切换信号的方法。 该方法包括确定要在输入光纤和输出光纤之间形成的光路。 该方法还包括确定要用于形成光路的一组反射镜。 镜组包括至少第一镜。 第一反射镜联接到机械弹簧组件和致动组件。 该方法使用位置感测装置捕获指示第一反射镜的空间位置的模拟信号。 感测装置耦合到反射镜。 该方法还将信号模拟信号转换为数字信号。 该方法使用数字信号处理装置处理指示反射镜的空间位置的数字信号，以获得反射镜的特性。 该方法基于反射镜的特性提供控制信号。 将控制信号转换为模拟控制信号。 该方法使用具有致动组件的模拟控制信号来设置第一反射镜的期望位置。
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8.发明授权公开(公告)号：US08917474B1
公开(公告)日：2014-12-23
申请号：US13205072
申请日：2011-08-08
IPC分类号： G11B21/02
CPC分类号： G11B21/12
摘要： A disk drive is disclosed comprising a head actuated over a disk, and a ramp near an outer diameter of the disk, wherein the ramp for unloading the head off the disk. The head is positioned at an inner diameter of the disk and then moved toward the ramp in response to a velocity profile. An interval is measured from a beginning of the movement until the head begins unloading onto the ramp, and the velocity profile is adjusted in response to the measured interval.
摘要翻译： 公开了一种磁盘驱动器，包括在磁盘上致动的磁头和靠近磁盘外径的斜面，其中用于将磁头从磁盘上卸下的斜面。 头部位于盘的内径处，然后响应于速度分布移动到斜坡。 从运动的开始到头部开始卸载到斜坡上来测量间隔，并且响应于测量的间隔来调整速度分布。
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9.发明授权Disk drive adjusting gain and offset of BEMF velocity sensor during self writing of spiral tracks 失效磁盘驱动器在自写入螺旋轨道期间调节BEMF速度传感器的增益和偏移公开(公告)号：US08665551B1
公开(公告)日：2014-03-04
申请号：US13334955
申请日：2011-12-22
IPC分类号： G11B5/596
CPC分类号： G11B5/59666 , G11B5/59661
摘要： A disk drive is disclosed comprising a disk, a head, and a voice coil motor (VCM) operable to actuate the head over the disk, wherein the VCM generates a back electromotive force (BEMF) voltage. At least one reference track is written on the disk, and the head is positioned near a first diameter of the disk. While moving the head from the first diameter toward a second diameter of the disk, the reference track is read and a first estimated state error is measured. While moving the head from the second diameter of the disk toward the first diameter of the disk, the reference track is read and a second estimated state error is measured. A gain and an offset of a velocity sensor are adjusted in response to the first and second estimated state errors.
摘要翻译： 公开了一种磁盘驱动器，其包括盘，头和音圈电机（VCM），其可操作以使磁头在磁盘上致动，其中VCM产生反电动势（BEMF）电压。 至少一个参考轨道被写在盘上，头部位于盘的第一直径附近。 当将头从第一直径移动到盘的第二直径时，读取参考轨迹并测量第一估计状态误差。 当将磁头从磁盘的第二直径移动到磁盘的第一直径时，读取参考磁道并测量第二估计状态误差。 响应于第一和第二估计状态误差来调节速度传感器的增益和偏移。
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10.发明授权Method and disk drive for improving head position accuracy during track following through real-time identification of external vibration 有权方法和磁盘驱动器，用于通过实时识别外部振动来提高跟踪跟踪期间的头部位置精度公开(公告)号：US06693764B1
公开(公告)日：2004-02-17
申请号：US09775256
申请日：2001-01-31
申请人： Edgar D. Sheh , Hemant Melkote , Vinay K. Agarwal
发明人： Edgar D. Sheh , Hemant Melkote , Vinay K. Agarwal
IPC分类号： G11B5596
CPC分类号： G11B5/59627 , G11B5/59622 , G11B5/59694
摘要： The present invention may be embodied in a method and a disk drive for improving head position accuracy during track following through real-time identification of external vibration. A selected track is followed using a servo control loop having a nominal gain and being responsive to position error signal samples generated based on a difference between head position samples and a reference head position value. A spectral power value within a predetermined frequency band is determined from a sequence of the position error signal samples. If a property of the spectral power value exceeds a threshold, the gain of the servo control loop is increased within the predetermined frequency band to attenuate the effect of external vibration on the position of the head over the selected track during track following.
摘要翻译： 本发明可以体现在一种方法和磁盘驱动器中，用于通过实时识别外部振动来提高跟踪跟踪期间的头部位置精度。 使用具有额定增益的伺服控制回路来跟踪所选轨道，并响应于基于头位置采样和参考头位置值之间的差产生的位置误差信号样本。 根据位置误差信号样本的序列确定预定频带内的频谱功率值。 如果频谱功率值的属性超过阈值，则在预定频带内增加伺服控制环路的增益，以在跟踪期间衰减外部振动对所选择的轨道上的头部位置的影响。
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