公开(公告)号：US06882487B2

公开(公告)日：2005-04-19

申请号：US10183680

申请日：2002-06-27

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

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

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

CPC classification number: G11B5/5534 ,  G11B5/59627

Abstract: 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.

Abstract translation: 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：US06744589B2

公开(公告)日：2004-06-01

申请号：US09847758

申请日：2001-05-02

Applicant: John C. Morris ,  Reed D. Hanson

Inventor： John C. Morris ,  Reed D. Hanson

IPC: G11B5596

CPC classification number: G11B5/5552

Abstract: A disc drive including a rotatable data track, a dual-stage actuator with a primary actuator motor supporting an actuator arm, a read/write head supported by the actuator arm and communicating with a secondary actuator motor, and steps for controlling range of motion of the secondary actuator motor. The controlling steps include supplying and sustaining a bias signal to a single-sided unipolar device driver that then apply a bias voltage the secondary actuator motor to induce the secondary actuator motor to expand substantially one half of its expansion capabilities. And, confining correction signals provided by a control circuit of the disc drive, used in correcting mechanical position of the secondary actuator motor, to a voltage ranging substantially between a positive “+” and negative “−” voltage substantially equal to the applied bias voltage.

Abstract translation: 包括可旋转数据轨道的磁盘驱动器，具有支持致动器臂的主执行器电动机的双级致动器，由致动器臂支撑并与辅助致动器电动机连通的读/写头以及用于控制运动范围的步骤 二次执行器电机。 控制步骤包括向单面单极器件驱动器提供和维持偏置信号，然后施加偏置电压次级致动器电动机以使二次致动器电动机基本上扩大其扩展能力的一半。 并且，将用于校正次级致动器电动机的机械位置的盘驱动器的控制电路提供的校正信号限制在基本上等于所施加的偏置电压的正“+”和“负”电压之间的电压 。

公开(公告)号：US5096219A

公开(公告)日：1992-03-17

申请号：US628035

申请日：1990-12-17

Applicant: Reed D. Hanson ,  Kamal N. Majeed

Inventor： Reed D. Hanson ,  Kamal N. Majeed

IPC: B60G17/018

CPC classification number: B60G17/018 ,  B60G2400/102 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/41 ,  B60G2500/10 ,  B60G2500/20 ,  B60G2600/16 ,  B60G2600/60 ,  B60G2600/604 ,  Y10S280/01

Abstract: A full vehicle suspension control for a wheeled vehicle includes a suspension actuator and an absolute accelerometer at each corner of the vehicle body. The actuators are controlled in response to vehicle body pitch and roll velocity signals which are derived from nominally vertical acceleration signals from the accelerometers by first deriving vehicle body pitch and roll acceleration signals and then integrating these signals into vehicle body roll and pitch velocity signals. The process of converting the body corner acceleration signals to pitch and roll acceleration signals reduces any non-vertical error of the signals before integration to reduce saturation of the integrator.

Abstract translation: 用于轮式车辆的全车悬架控制器包括在车身的每个角落处的悬架致动器和绝对加速度计。 响应于通过首先导出车体俯仰和侧倾加速度信号然后将这些信号集成到车体卷和俯仰速度信号中的来自加速度计的标称垂直加速度信号的车身俯仰和侧倾速度信号来控制致动器。 将车身拐角加速度信号转换为俯仰加速度信号和滚动加速度信号的过程减少了积分前的信号的任何非垂直误差，从而降低了积分器的饱和度。

公开(公告)号：US07589930B2

公开(公告)日：2009-09-15

申请号：US11724124

申请日：2007-03-14

Applicant: Reed D. Hanson ,  Thomas C. Zirps ,  Peng Yan ,  Samir Mittal ,  Timothy F. Ellis

Inventor： Reed D. Hanson ,  Thomas C. Zirps ,  Peng Yan ,  Samir Mittal ,  Timothy F. Ellis

IPC: G11B5/596

CPC classification number: G11B5/59627

Abstract: Compensation for repeated runout (RRO) error, such as in a data storage device servo circuit, is preferably carried out by obtaining a population distribution of RRO error values from at least selected ones of a subset of tracks. An RRO error compensation value is determined for each one of the subset of tracks when a variance characteristic of said population distribution meets a selected criterion. Preferably, a first track of a storage medium has a servo field at a first angular position on the medium, a repeated runout (RRO) error compensation field at a second angular position on the medium, and a user data field at a third angular position on the medium. An immediately adjacent second track preferably has a servo field at the first angular position and a user data field at the second angular position in lieu of an RRO error compensation field.

Abstract translation: 针对重复跳动（RRO）错误的补偿，例如在数据存储设备伺服电路中，优选地通过从轨道子集中的至少选定的RRO误差值获得RRO误差值的总体分布来执行。 当所述人口分布的方差特征满足所选择的标准时，对于轨道子集中的每一个确定RRO误差补偿值。 优选地，存储介质的第一轨道在介质上的第一角度位置处具有伺服磁场，在介质上的第二角位置处的重复跳动（RRO）误差补偿场，以及在第三角位置处的用户数据场 在媒体上 最近相邻的第二轨道优选地具有位于第一角位置处的伺服场，而在第二角位置具有用户数据场，而不是RRO误差补偿场。

公开(公告)号：US5235529A

公开(公告)日：1993-08-10

申请号：US695881

申请日：1991-05-06

Applicant: Reed D. Hanson ,  Kamal N. Majeed ,  Steven L. Tracht ,  John J. Westerkamp

Inventor： Reed D. Hanson ,  Kamal N. Majeed ,  Steven L. Tracht ,  John J. Westerkamp

IPC: B60G17/018 ,  B60G23/00

CPC classification number: B60G17/018 ,  B60G2400/10 ,  B60G2400/102 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/91 ,  B60G2600/02 ,  B60G2600/16 ,  B60G2600/60 ,  B60G2600/602 ,  B60G2600/76 ,  B60G2600/90 ,  B60G2800/012 ,  B60G2800/014 ,  B60G2800/22 ,  B60G2800/24

Abstract: In a vehicle suspension control in which the output of a vehicle body mounted absolute vertical acceleration sensor is integrated to provide an absolute vertical velocity signal, the sensor output is high pass filtered to remove DC components but pass components in the frequency range 1-2 Hz. The filter comprises a second order digital all-pass filter embodied recursively on a 16 bit, fixed point, digital signal processor (DSP). A first stage normalized lattice two-pair network reduces to a unity gain stage; and a second stage single multiplier two-pair lattice network minimizes computational time. The 32 bit internal accumulators of the 16 bit DSP are used advantageously to prevent errors due to internal overflow of the recursive variable.

公开(公告)号：US20080225654A1

公开(公告)日：2008-09-18

申请号：US11724124

申请日：2007-03-14

Applicant: Reed D. Hanson ,  Thomas C. Zirps ,  Peng Yan ,  Samir Mittal ,  Timothy F. Ellis

Inventor： Reed D. Hanson ,  Thomas C. Zirps ,  Peng Yan ,  Samir Mittal ,  Timothy F. Ellis

IPC: G11B7/00

CPC classification number: G11B5/59627

Abstract: Compensation for repeated runout (RRO) error, such as in a data storage device servo circuit, is preferably carried out by obtaining a population distribution of RRO error values from at least selected ones of a subset of tracks. An RRO error compensation value is determined for each one of the subset of tracks when a variance characteristic of said population distribution meets a selected criterion. Preferably, a first track of a storage medium has a servo field at a first angular position on the medium, a repeated runout (RRO) error compensation field at a second angular position on the medium, and a user data field at a third angular position on the medium. An immediately adjacent second track preferably has a servo field at the first angular position and a user data field at the second angular position in lieu of an RRO error compensation field.

Abstract translation: 针对重复跳动（RRO）错误的补偿，例如在数据存储设备伺服电路中，优选地通过从轨道子集中的至少选定的RRO误差值获得RRO误差值的总体分布来执行。 当所述人口分布的方差特征满足所选择的标准时，对于轨道子集中的每一个确定RRO误差补偿值。 优选地，存储介质的第一轨道在介质上的第一角度位置处具有伺服磁场，在介质上的第二角位置处的重复跳动（RRO）误差补偿场，以及在第三角位置处的用户数据场 在媒体上 最近相邻的第二轨道优选地具有位于第一角位置处的伺服场，而在第二角位置具有用户数据场，而不是RRO误差补偿场。

公开(公告)号：US07119981B2

公开(公告)日：2006-10-10

申请号：US10184702

申请日：2002-06-28

Applicant: Reed D. Hanson ,  Nathaniel B. Wilson ,  John C. Morris ,  Timothy F. Ellis

Inventor： Reed D. Hanson ,  Nathaniel B. Wilson ,  John C. Morris ,  Timothy F. Ellis

IPC: G11B5/596 ,  G11B5/55

CPC classification number: G11B5/5534 ,  G11B5/59627

Abstract: An apparatus and method for tracking radially-dependent repeatable run-out in a disc drive having a servo loop for positioning a head over a rotating disc is provided. The disc includes multiple tracks. Radially-dependent repeatable run-out control components for at least a subset of the multiple tracks are first determined. Data representative of the radially-dependent repeatable run-out control components for the subset of the multiple tracks is then stored. The stored data representative of the radially-dependent repeatable run-out control components is retrieved before settling on the target track, and subsequently used to follow the selected track.

公开(公告)号：US06952320B1

公开(公告)日：2005-10-04

申请号：US09733405

申请日：2000-12-08

Applicant: Brian Pollock ,  Alexei H. Sacks ,  Brian Sudman ,  James H. McGlennen ,  Reed D. Hanson

Inventor： Brian Pollock ,  Alexei H. Sacks ,  Brian Sudman ,  James H. McGlennen ,  Reed D. Hanson

IPC: G11B5/596 ,  G11B15/12

CPC classification number: G11B5/59627

Abstract: The present invention relates to repeatable runout (RRO) compensation of servo control systems that can be used in disc drives or spin-stands. The RRO relates to eccentricity between servo tracks, which were written onto a disc prior to the installation of the disc into the disc drive or spin-stand, and an axis of rotation of the disc. The present invention compensates the servo control loop by canceling the RRO and controlling a head to follow virtual tracks which are eccentric to the data tracks defined by the servo tracks and concentric with the axis of rotation of the disc.

Abstract translation: 本发明涉及可用于盘式驱动器或旋转架的伺服控制系统的可重复跳动（RRO）补偿。 RRO涉及在将盘安装到盘驱动器或旋转架之前写在盘上的伺服轨道之间的偏心度以及盘的旋转轴。 本发明通过取消RRO来补偿伺服控制回路，并且控制磁头跟随偏心于由伺服磁道限定的数据磁道并与磁盘的旋转轴线同心的虚拟磁道。

公开(公告)号：US5024460A

公开(公告)日：1991-06-18

申请号：US454309

申请日：1989-12-26

Applicant: Reed D. Hanson ,  Scott T. Radcliffe

Inventor： Reed D. Hanson ,  Scott T. Radcliffe

IPC: B60G17/015 ,  B60G17/018 ,  B60G17/08

CPC classification number: B60G17/018 ,  B60G2400/102 ,  B60G2400/106 ,  B60G2400/202 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2400/40 ,  B60G2500/102 ,  B60G2600/02 ,  B60G2600/12 ,  B60G2600/14 ,  B60G2600/16 ,  B60G2600/26 ,  B60G2600/604 ,  B60G2600/70 ,  B60G2600/74 ,  B60G2600/76 ,  B60G2600/90 ,  B60G2800/22

Abstract: In a suspension control comprising a damper having a valve switchable at frequencies within a desired activation frequency range between high and low damping modes, an unfiltered damper signal is repeatedly derived from vehicle suspension related variables at a range significantly greater than the desired activation frequency range. An output filter derives a filtered damper signal from each successive binary actuator force signal by (1) resetting a timer each time the unfiltered damper signal changes value, (2) causing the filtered damper signal to be the same value as the unfiltered damper signal while the timer is inactive, and (3) maintaining the filtered damper signal value unchanged while the timer is active. The damper is controlled in response to the filtered damper signal, whereby unnecessary high frequency switching of the valve is reduced but the damper responds without unnecessary delay to signals within the desired activation frequency range.