公开(公告)号：US06580574B1

公开(公告)日：2003-06-17

申请号：US09866001

申请日：2001-05-25

申请人： Raffi Codilian

发明人： Raffi Codilian

IPC分类号： G11B1904

CPC分类号： G11B21/12 ,  G11B19/04

摘要： A mobile device is disclosed comprising a disk storage system comprising a disk and a head actuated over the disk, the disk comprising a data area. The mobile device further comprises a pressure-sensitive detector for detecting a pressure on the mobile device, and for detecting a decrease in the pressure on the mobile device indicating the mobile device may have been dropped. When the pressure-sensitive detector detects the decrease in the pressure, retracting circuitry within the mobile device retracts the head to a retracted position away from the data area of the disk.

摘要翻译： 公开了一种移动设备，其包括磁盘存储系统，该磁盘存储系统包括磁盘和在磁盘上启动的磁头，磁盘包括数据区域。 移动设备还包括用于检测移动设备上的压力的压敏检测器，并且用于检测指示移动设备可能已经丢弃的移动设备上的压力的降低。 当压敏检测器检测到压力的降低时，移动装置内的回缩电路将头部缩回到远离盘的数据区的缩回位置。

公开(公告)号：US06204988B1

公开(公告)日：2001-03-20

申请号：US09138841

申请日：1998-08-24

申请人： Raffi Codilian ,  Edgar De-Jia Sheh ,  Jie Yu

发明人： Raffi Codilian ,  Edgar De-Jia Sheh ,  Jie Yu

IPC分类号： G11B2102

CPC分类号： G11B5/59622 ,  G11B5/59616

摘要： The invention is a method of characterizing the frequency response of the servo control system in a disk drive having a sampled servo system having a sampling rate and a nominal bandwidth, wherein the sampled servo system comprises a plant and a servo controller that controls the plant using a compensator and a gain element with a nominal open loop gain. The invention is, in more detail, a method for adaptively modifying the servo controller to compensate for plant variations which are incompatible with the nominal gain and bandwidth, including the steps of implementing a self-generated bode plot to determine a gain margin and a phase margin, and if the gain margin is not greater than a predetermined minimum, adjusting the open loop gain of the servo controller to provide a gain margin which is greater than the predetermined minimum at a bandwidth which is different than the nominal bandwidth; and adjusting the compensator to provide a phase margin which is greater than a predetermined minimum.

摘要翻译： 本发明是一种在具有采样率和标称带宽的采样伺服系统的磁盘驱动器中表征伺服控制系统的频率响应的方法，其中采样伺服系统包括工厂和伺服控制器，其控制工厂使用 补偿器和具有标称开环增益的增益元件。 本发明更详细地涉及一种用于自适应地修改伺服控制器以补偿与标称增益和带宽不兼容的工厂变化的方法，包括实施自生成波特图以确定增益裕度和相位的步骤 并且如果所述增益裕度不大于预定最小值，则调整所述伺服控制器的开环增益以在不同于所述标称带宽的带宽上提供大于所述预定最小值的增益裕度; 并且调整补偿器以提供大于预定最小值的相位裕量。

公开(公告)号：US06198584B1

公开(公告)日：2001-03-06

申请号：US09070945

申请日：1998-04-30

申请人： Raffi Codilian ,  Ara W. Nazarian ,  Brian Tanner

发明人： Raffi Codilian ,  Ara W. Nazarian ,  Brian Tanner

IPC分类号： G11B509

CPC分类号： G11B5/5534 ,  G11B5/59655 ,  G11B5/59683

摘要： A disk drive with a disk having a servo pattern including a special “calibration track” wherein a plurality of staggered calibration burst pairs define null points that are radially shifted from a burst pair centerline by precise, predefined, fractional track amounts to collectively provide accurate information about servo signal values generated as a function of real displacement. The staggered calibration bursts beneficially allows for calibrating the PES signal after the drive is removed from the servowriter during a manufacturing phase called Intelligent Burn-In. The staggered calibration bursts are preferably written in data regions so that they are disposable and may be selectively written over with data to maximize storage space. Some or all of the calibration bursts may alternatively be retained for a subsequent recalibration.

摘要翻译： 具有盘的盘驱动器具有包括特殊的“校准轨迹”的伺服模式，其中多个交错的校准脉冲串对定义从脉冲串对中心线径向移位精确的，预定义的分数轨迹量的空点，以共同提供准确的信息 关于作为实际位移的函数产生的伺服信号值。 交错的校准脉冲串有利地允许在称为智能老化的制造阶段从伺服驱动器移除驱动器之后校准PES信号。 交错的校准突发优选地写入数据区域，使得它们是一次性的，并且可以选择性地写入数据以最大化存储空间。 备选地，可以保留部分或全部校准脉冲串用于随后的重新校准。

公开(公告)号：US6091564A

公开(公告)日：2000-07-18

申请号：US71390

申请日：1998-04-30

申请人： Raffi Codilian ,  Timothy Elliott

发明人： Raffi Codilian ,  Timothy Elliott

IPC分类号： G11B5/55 ,  G11B21/02

CPC分类号： G11B5/59661 ,  G11B5/5534

摘要： A disk drive with a disk having a servo pattern including a special "calibration track" wherein a plurality of calibration burst pairs are recorded on a spiral centerline to define null points that are radially shifted from a burst pair centerline by precise, predefined or subsequently measured, fractional track amounts to collectively provide accurate information about servo signal values generated as a function of real displacement. The calibration burst pairs beneficially allow for calibrating the PES signal after the drive is removed from the servowriter during a manufacturing phase called Intelligent Burn-In. The calibration bursts are recorded on a spiral to reduce the recording time and are preferably written in data regions so that they are disposable and may be selectively written over with data to maximize storage space. Some or all of the calibration burst pairs may be retained for a subsequent recalibration.

摘要翻译： 具有盘的盘驱动器具有包括特殊的“校准轨迹”的伺服模式，其中多个校准脉冲串对被记录在螺旋中心线上以限定从脉冲串对中心线径向偏移的空点，由精确，预定义或随后测量 ，分数轨迹总计提供关于作为实际位移的函数产生的伺服信号值的精确信息。 在称为智能老化的制造阶段，驱动器从伺服驱动器中取出后，校准脉冲串有利地允许校准PES信号。 校准脉冲串被记录在螺旋上以减少记录时间，并且优选地写入数据区域，使得它们是一次性的，并且可以选择性地写入数据以最大化存储空间。 可以保留部分或全部校准突发对以用于随后的重新校准。

公开(公告)号：US6014283A

公开(公告)日：2000-01-11

申请号：US856670

申请日：1997-05-15

申请人： Raffi Codilian ,  Ara W. Nazarian ,  David Dung Tien Nguyen

发明人： Raffi Codilian ,  Ara W. Nazarian ,  David Dung Tien Nguyen

IPC分类号： G11B5/00 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B2005/0016 ,  G11B5/59655 ,  G11B5/59683

摘要： A magnetic storage disk drive having a servo burst pattern which asymmetrically increases the linear region in which a read head may be micro-jogged from a burst pair center line to align the read head with a data track. The innovative servo pattern comprises a first pair of servo bursts that define a first burst pair centerline for writing a particular data track to a data track side of the first centerline, and a second pair of servo bursts collectively define a second burst pair centerline that is positioned to the data track side of the first burst pair centerline and is sufficiently close to the first burst pair center line so that the read head "sees" the second pair of servo bursts before "losing" the first pair of servo bursts when micro-jogged to the data track side for reading. The second burst pair centerline should be no farther from the first burst pair centerline than the linear read width of the read head. The preferred servo bursts span a full track pitch are arranged in a uniformly repeating pattern of A/B and C/D burst pairs. The first burst pair centerline may be defined by the A/B pairs in one annular disk region and by the C/D burst pairs in another annular disk region in order to asymmetrically expand the linear region in the direction needed for micro-jogging the read head in different directions within the respective annular regions.

摘要翻译： 具有伺服突发图案的磁存储盘驱动器，其不对称地增加读取头可以从脉冲串对中心线微点击以将读取头与数据轨道对准的线性区域。 创新的伺服模式包括第一对伺服突发，其定义用于将特定数据轨迹写入第一中心线的数据轨道侧的第一突发对中心线，第二对伺服脉冲串共同定义第二突发对中心线， 位于第一突发对中心线的数据轨道侧并且足够接近第一突发对中心线，使得读取头在“丢失”第一对伺服脉冲串之前“看到”第二对伺服脉冲串， 慢跑到数据轨道侧进行阅读。 第二个突发对中心线应该不比第一个突发对中心线远离读取头的线性读取宽度。 以A / B和C / D突发对的均匀重复模式布置跨越全轨道间距的优选伺服突发。 第一突发对中心线可以由一个环形盘区域中的A / B对和另一个环形盘区域中的C / D突发对来限定，以便在读取微步数所需的方向上不对称地扩展线性区域 在各个环形区域内以不同的方向头部。

公开(公告)号：US5946157A

公开(公告)日：1999-08-31

申请号：US895248

申请日：1997-07-21

申请人： Raffi Codilian ,  Timothy Elliott ,  Ara W. Nazarian ,  Brian Tanner

发明人： Raffi Codilian ,  Timothy Elliott ,  Ara W. Nazarian ,  Brian Tanner

IPC分类号： G11B5/596 ,  G11B5/02

CPC分类号： G11B5/59633 ,  G11B5/59655 ,  G11B5/59683

摘要： The invention relates generally to rotating magnetic storage disk drive and, more particularly, to a method of seamlessly recording circumferentially overlapping servo bursts on a magnetic disk with successive passes of a write head that is guided by a servo track writer wherein the servo bursts are contained in at least two servo burst groups that each have at least one circumferential burst position which may contain a servo burst. The method comprises the steps of turning a write current ON while passing the write head over a current ramp region that does not contain servo data and is located in front of an "active" servo burst group that will be modified on this pass, modifying a servo burst in at least one circumferential position of the active servo burst group with the write current ON; turning the write current OFF while passing the write head over a current ramp region that does not contain servo data and is located in front of a "passive" servo burst group that will not be modified on this pass; and skipping over at least one circumferential burst position of the passive servo burst group with the write current OFF.

摘要翻译： 本发明一般涉及旋转磁存储盘驱动器，更具体地，涉及一种在磁盘上无缝地记录周向重叠的伺服脉冲串的方法，其中连续通过由伺服磁道写入器引导的写入头，其中包含伺服脉冲串 在至少两个伺服脉冲串组中，每个具有可包含伺服脉冲串的至少一个周期脉冲串位置。 该方法包括以下步骤：在写入头通过不包含伺服数据的电流斜坡区域并且位于将在该通路上被修改的“主动”伺服脉冲串组的前面时转动写入电流， 伺服脉冲串在有效伺服脉冲串组的至少一个圆周位置上写入电流ON; 在写入头通过不包含伺服数据的电流斜坡区域并且位于在该通过时将不被修改的“被动”伺服脉冲串组的前面时，转动写入电流OFF; 并且在写入电流OFF的情况下跳过被动伺服脉冲串组的至少一个圆周脉冲串位置。