公开(公告)号：US06580579B1

公开(公告)日：2003-06-17

申请号：US09621163

申请日：2000-07-21

申请人： Yi-Ping Hsin ,  John C. Morris ,  Dustin M. Cvancara

发明人： Yi-Ping Hsin ,  John C. Morris ,  Dustin M. Cvancara

IPC分类号： G11B5596

CPC分类号： G11B5/59627 ,  G11B5/5582

摘要： A system and method for attenuating the effect of rotational vibration on the positioning of the read/write head in a disc drive. The rotational acceleration of the disc drive body is sensed and applied to an adaptive filter that produces a feedforward signal designed to offset the effects of the rotational vibration. The adaptive filter adjusts its parameters based on the rotational acceleration signal, the position error signal of the servo system, and a transfer function relating the actual position signal to the feedforward signal. The plant estimate of the transfer function relating the actual position signal to the feedforward signal is determined off-line and stored for use by the adaptive filter in adjusting its parameters during operation.

摘要翻译： 一种用于衰减旋转振动对读/写头在盘驱动器中的定位的影响的系统和方法。 磁盘驱动器体的旋转加速度被感测并施加到自适应滤波器，该自适应滤波器产生被设计为抵消旋转振动的影响的前馈信号。 自适应滤波器基于旋转加速度信号，伺服系统的位置误差信号和与实际位置信号与前馈信号相关联的传递函数来调整其参数。 关于实际位置信号与前馈信号的传递函数的工厂估计被离线地确定并存储供自适应滤波器在操作期间调节其参数。

公开(公告)号：US06341048B1

公开(公告)日：2002-01-22

申请号：US09488377

申请日：2000-01-20

申请人： John C. Morris ,  Dustin M. Cvancara

发明人： John C. Morris ,  Dustin M. Cvancara

IPC分类号： G11B2110

CPC分类号： G11B5/5965 ,  G11B5/59611

摘要： A method and apparatus are provided for positioning a head based on a control signal and a cancellation signal. In the method and apparatus, a sensor located in the disc drive is capable of generating sensor data samples at a sensor data rate that is different from a servo data rate. A data enlarger inserts additional data samples between the sensor data samples to produce enlarged data that is filtered to produce filtered data, which is decimated to form decimated sensor data at the servo data rate. A cancellation component converts the decimated sensor data into a cancellation signal that may be combined with a control signal to control the actuator. A sensor chip is also provided that includes a sensing element and a sigma-delta circuit that cooperate to generate sensor samples at a sensor data rate and a buffer that stores sensor samples at the sensor data rate.

摘要翻译： 提供了一种基于控制信号和消除信号来定位头的方法和装置。 在该方法和装置中，位于盘驱动器中的传感器能​​够以不同于伺服数据速率的传感器数据速率生成传感器数据采样。 数据放大器在传感器数据样本之间插入附加数据样本，以产生被过滤以产生滤波数据的放大数据，其被抽取以以伺服数据速率形成抽取的传感器数据。 取消组件将抽取的传感器数据转换成可与控制信号组合的消除信号，以控制致动器。 还提供了一种传感器芯片，其包括感测元件和Σ-Δ电路，其协作以传感器数据速率生成传感器样本，以及以传感器数据速率存储传感器样本的缓冲器。

公开(公告)号：US06311140B1

公开(公告)日：2001-10-30

申请号：US09723358

申请日：2000-11-27

申请人： John C. Morris ,  Dustin M. Cvancara

发明人： John C. Morris ,  Dustin M. Cvancara

IPC分类号： G01P1508

CPC分类号： G11B5/5965 ,  G11B5/59611

摘要： A sensor chip is provided that includes a sensing element and a sigma-delta circuit that cooperate to generate sensor samples at a sensor data rate and a buffer that stores sensor samples at the sensor data rate. Although the buffer stores the samples at the sensor data rate, it is capable of providing the samples to an external circuit at a higher data rate. In one embodiment, the sensor chip is able to provide the stored sensor samples to an off-chip component at a rate set by the off-chip component.

摘要翻译： 提供了一种传感器芯片，其包括感测元件和Σ-Δ电路，其协作以传感器数据速率生成传感器样本，并且缓冲器以传感器数据速率存储传感器样本。 虽然缓冲器以传感器数据速率存储样本，但是能够以更高的数据速率将样本提供给外部电路。 在一个实施例中，传感器芯片能够以由片外部件设置的速率将存储的传感器样本提供给片外部件。

公开(公告)号：US06414813B2

公开(公告)日：2002-07-02

申请号：US09770422

申请日：2001-01-26

申请人： Dustin M. Cvancara

发明人： Dustin M. Cvancara

IPC分类号： G11B5596

CPC分类号： G11B5/5582 ,  G11B5/59627 ,  G11B21/106

摘要： A disc drive controller corrects for rotational vibration disturbances of a head position. The controller includes multiple sets of adjustable controller gains. The controller compares an accelerometer output to an acceleration threshold and generates conditional branches as a function of the comparison. The controller updates one set of the adjustable controller gains within a computational time limit after a first conditional branching. The controller updates a second set of the adjustable controller gains within the computational time limit after a second conditional branching.

摘要翻译： 磁盘驱动器控制器校正磁头位置的旋转振动干扰。 控制器包括多组可调控制器增益。 控制器将加速度计输出与加速度阈值进行比较，并根据比较产生条件分支。 在第一条件分支之后，控制器在计算时限内更新一组可调控制器增益。 在第二条件分支之后，控制器在计算时限内更新第二组可调控制器增益。

公开(公告)号：US06882487B2

公开(公告)日：2005-04-19

申请号：US10183680

申请日：2002-06-27

申请人： Reed D. Hanson ,  Timothy F. Ellis ,  Dustin M. Cvancara ,  Nathaniel B. Wilson

发明人： Reed D. Hanson ,  Timothy F. Ellis ,  Dustin M. Cvancara ,  Nathaniel B. Wilson

IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B27/30 ,  G11B19/247

CPC分类号： G11B5/5534 ,  G11B5/59627

摘要： An apparatus and method for compensating for variation in sample rate in a disc drive having a rotating disc and a head that is positioned over the rotating disc is provided. The disc includes at least one track that has multiple consecutive sectors. A sample rate value between timing marks of each pair of consecutive sectors of the multiple consecutive sectors is computed to obtain a sequence of sample rate values. A sequence of timing error values is computed as a function of the sequence of sample rate values and a nominal sample rate value. Data related to the sequence of timing error values is utilized to compensate for variation in sample rate values.

摘要翻译： 提供了一种用于补偿具有旋转盘和位于旋转盘上的头的盘驱动器中的采样率变化的装置和方法。 盘包括具有多个连续扇区的至少一个轨道。 计算多个连续扇区的每对连续扇区的定时标记之间的采样率值，以获得采样率值序列。 根据采样率值和标称采样率值的顺序计算定时误差值序列。 利用与定时误差值序列有关的数据来补偿采样率值的变化。

公开(公告)号：US06629448B1

公开(公告)日：2003-10-07

申请号：US09766285

申请日：2001-01-19

申请人： Dustin M. Cvancara

发明人： Dustin M. Cvancara

IPC分类号： G01P1508

CPC分类号： G01P21/00 ,  G01P15/08

摘要： A disc storage system performing an in-situ test on a MEMS accelerometer, in a disc drive. The circuit includes a control circuit that establishes a desired self test condition conducive to the in-situ test during a self test interval. The circuit includes a stored reference representing at least one characteristic limit of an integrity output of the, MEMS accelerometer. The circuit includes a test circuit that receives the integrity output value and the stored reference during the in-situ test interval and that generates an in-situ test output representative of integrity of the MEMS accelerometer. Damaged or degraded MEMS accelerometers can be diagnosed in-situ.

摘要翻译： 盘式存储系统，其在盘式驱动器中对MEMS加速度计进行原位测试。 该电路包括一个控制电路，该控制电路在自检间隔期间建立有利于原位测试的期望的自检条件。 该电路包括表示MEMS加速度计的完整性输出的至少一个特征极限的存储的参考。 电路包括测试电路，其在原位测试间隔期间接收完整性输出值和存储的参考，并产生代表MEMS加速度计完整性的原位测试输出。 可以原位诊断损坏或降级的MEMS加速度计。