公开(公告)号：US08970980B1

公开(公告)日：2015-03-03

申请号：US13169938

申请日：2011-06-27

申请人： Abhishek Dhanda ,  Wei Guo ,  Russ A. Quisenberry ,  Guoxiao Guo ,  Jie Yu

发明人： Abhishek Dhanda ,  Wei Guo ,  Russ A. Quisenberry ,  Guoxiao Guo ,  Jie Yu

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： A disk drive is disclosed comprising a disk and a head actuated over the disk. A burst metric is generated in response to a burst read signal. The burst metric comprises at least one of an alpha metric comprising a ratio of a first burst amplitude of a first phased based servo burst measured at a first radial offset to a second burst amplitude of a second phased based servo burst measured at a second radial offset, a harmonic metric comprising a ratio of a first harmonic of the burst read signal as the head is moved radially over the disk to a higher harmonic of the burst read signal as the head is moved radially over the disk, and a spiral track crossing metric comprising a first and second interval each representing a partial duration of the read element crossing a spiral track.

摘要翻译： 公开了一种磁盘驱动器，其包括盘和在盘上致动的磁头。 响应于突发读取信号产生突发度量。 突发度量包括以下中的至少一个：α度量，其包括在第一径向偏移处测量的第一基于相位的猝发脉冲的第一脉冲串幅度与在第二径向偏移量测量的基于第二相位的伺服脉冲串的第二脉冲串幅度的比率 当磁头径向移动到磁盘上时，当磁头在磁盘上径向移动到脉冲串读取信号的高次谐波时，包括突发读取信号的第一谐波的比率的谐波度量，以及螺旋轨迹交叉度量 包括第一和第二间隔，每个间隔代表穿过螺旋轨道的读取元件的部分持续时间。

公开(公告)号：US06534936B2

公开(公告)日：2003-03-18

申请号：US09560918

申请日：2000-04-28

申请人： Carl R. Messenger ,  Russ A. Quisenberry

发明人： Carl R. Messenger ,  Russ A. Quisenberry

IPC分类号： H02P602

CPC分类号： G11B19/20

摘要： A disk drive is connectable to a power supply voltage and includes a spindle motor, a spindle motor driver, a spindle motor controller, and a detector. The spindle motor has windings and a rotatable rotor. The spindle motor driver is connected to the windings and connectable to the voltage. The spindle motor controller commands the spindle motor driver to apply the voltage across at least one of the windings to cause the rotor to rotate, which induces a BEMF having a polarity across each of the windings. The spindle motor controller subsequently commands the spindle motor driver to remove the applied voltage across the windings, and the detector monitors the BEMF in each of the windings to detect the polarity of the BEMF in each of the windings to generate a previous multi-bit sequence representing a previous phase position ({circumflex over (&thgr;)}n) of the rotor and subsequently detect a change in the polarity of the BEMF in one of the windings to generate a present multi-bit sequence representing a present position (&thgr;n) of the rotor. The spindle motor controller is responsive to the previous phase position ({circumflex over (&thgr;)}n) and the present phase position (&thgr;n) of the rotor for selecting an initial commutation state for commanding the spindle motor driver to initiate a spin-up commutation sequence starting from the selected initial commutation state such that the voltage is sequentially applied across a selected combination of the windings in order to spin-up the spindle motor to an operating spin-rate.

摘要翻译： 磁盘驱动器可连接到电源电压，包括主轴电机，主轴电机驱动器，主轴电机控制器和检测器。 主轴电机具有绕组和可转动的转子。 主轴电机驱动器连接到绕组并连接到电压。 主轴电动机控制器命令主轴电动机驱动器将电压施加到至少一个绕组上，以使转子旋转，这引起一个绕每个绕组具有极性的BEMF。 主轴电动机控制器随后命令主轴电动机驱动器去除绕组上施加的电压，并且检测器监测每个绕组中的BEMF以检测每个绕组中的BEMF的极性，以产生先前的多位序列 代表转子的先前相位位置（thetan），随后检测绕组中的一个绕组中的BEMF的极性的变化，以产生表示转子的当前位置（thetan）的当前多位序列。 主轴电动机控制器响应于转子的先前相位位置（thetan）和当前相位位置（thetan），用于选择初始换向状态，用于指令主轴电动机驱动器从所选择的初始位置开始启动升压换向序列 换向状态，使得电压顺序地施加在选定的绕组组合上，以便将主轴电机旋转到操作旋转速率。

公开(公告)号：US07184230B1

公开(公告)日：2007-02-27

申请号：US10160954

申请日：2002-06-01

申请人： Jack M. Chue ,  Jai N. Subrahmanyam ,  Russ A. Quisenberry

发明人： Jack M. Chue ,  Jai N. Subrahmanyam ,  Russ A. Quisenberry

IPC分类号： G11B5/02

CPC分类号： G11B5/59605 ,  G11B5/5547

摘要： A system and method for processing track identifier errors to mitigate head instability in data storage devices is disclosed. The system and method includes computing a track id differential between an expected track id and a received track id, encoding the expected track id and the received track id, initiating a first action if the track id differential exceeds a pre-determined threshold and the encoded expected track id varies from the encoded received track id by a pre-configured number of bits, and initiating a second action if the track id differential does not exceed the pre-determined threshold or the encoded expected track id does not vary from the encoded received track id by a pre-configured number of bits.

摘要翻译： 公开了一种用于处理磁道标识符错误以减轻数据存储设备中的磁头不稳定性的系统和方法。 该系统和方法包括：计算预期轨迹id和接收轨迹id之间的轨道ID差分，编码预期轨道id和接收轨道id，如果轨道id差异超过预定阈值则启动第一动作， 预期轨迹id与编码的接收轨道id相差预先配置的比特数，并且如果轨道id差异不超过预定阈值或编码的预期轨道id不与编码的接收 轨道ID由预先配置的位数。

公开(公告)号：US06826006B1

公开(公告)日：2004-11-30

申请号：US10262482

申请日：2002-09-30

申请人： Hemant Melkote ,  Russ A. Quisenberry

发明人： Hemant Melkote ,  Russ A. Quisenberry

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A method is disclosed for recursively determining repeatable runout (RRO) cancellation values in a disk drive having a head disk assembly (HDA) and a sampled servo controller. The HDA includes a disk having distributed position information in servo wedges, a rotary actuator carrying a head that periodically reads the position information, and a voice coil motor circuit that responds to a control effort signal. The servo controller periodically adjusts the control effort signal during a track-following operation. In the method, resonant filter values for developing RRO cancellation values are iteratively learned and updated after each disk rotation during track following operations on a predetermined track until a threshold, such as a particular number of disk rotations, is obtained.

摘要翻译： 公开了一种用于递归地确定具有头盘组件（HDA）和采样伺服控制器的磁盘驱动器中的可重复跳动（RRO）消除值的方法。 HDA包括具有伺服楔形体中的分布位置信息的磁盘，承载周期性地读取位置信息的磁头的旋转致动器以及响应于控制力信号的音圈电机电路。 伺服控制器在跟踪跟踪操作期间周期性地调整控制功率信号。 在该方法中，用于开发RRO抵消值的谐振滤波器值在轨道跟踪操作之后的每个盘旋转之后在预定轨道上被迭代地学习和更新，直到获得诸如特定数量的盘旋转之类的阈值。