公开(公告)号：US06721120B2

公开(公告)日：2004-04-13

申请号：US09844159

申请日：2001-04-27

申请人： Shuang Quan Min ,  Kian Keong Ooi ,  Ricky WeiWatt Yeo ,  Chiap Heok Ang ,  Ming Zhong Ding ,  Beng Wee Quak

发明人： Shuang Quan Min ,  Kian Keong Ooi ,  Ricky WeiWatt Yeo ,  Chiap Heok Ang ,  Ming Zhong Ding ,  Beng Wee Quak

IPC分类号： G11B2102

CPC分类号： G11B5/59633

摘要： A method for writing servo information to a disc rotatably mounted to a spindle motor. A measured cage frequency is obtained from a written reference track, from which an actual cage frequency is predicted. The predicted cage frequency is then used to derive compensated position commands. During a servo write interval, the compensated position commands are used to control the head such that the head follows the disc movements caused by the cage frequency.

摘要翻译： 一种将伺服信息写入可旋转地安装在主轴电动机上的盘的方法。 测量的笼式频率从预测实际笼频率的书写参考轨迹获得。 然后使用预测的笼式频率来导出补偿位置命令。 在伺服写入间隔期间，补偿位置命令用于控制磁头，使得磁头跟随由磁盘笼频率引起的磁盘运动。

公开(公告)号：US06587293B1

公开(公告)日：2003-07-01

申请号：US09516010

申请日：2000-02-29

申请人： Ming Zhong Ding ,  Kian Keong Ooi ,  Wei Wei Sun ,  Chiap Heok Ang ,  Beng Wee Quak

发明人： Ming Zhong Ding ,  Kian Keong Ooi ,  Wei Wei Sun ,  Chiap Heok Ang ,  Beng Wee Quak

IPC分类号： G11B509

CPC分类号： G11B5/59644

摘要： A servo writer writes servo information to at least one disc of a head disc assembly. The servo writer includes a clock head that writes a clock track to the at least one disc and generates a clock signal when the clock head reads the clock track on the at least one disc. A servo pattern generator writes servo patterns to the at least one disc in response to the clock signal generated by the clock head reading the clock track on the at least one disc. The servo track writer also includes a phase lock loop clock generator which synchronizes to the clock track and produces the clock signal for the servo pattern generator.

摘要翻译： 伺服写入器将伺服信息写入头盘组件的至少一个盘。 伺服写入器包括时钟磁头，其将时钟磁道写入至少一个磁盘，并在时钟磁头读取至少一个磁盘上的时钟磁道时产生时钟信号。 伺服模式发生器响应于读取时钟磁道在至少一个盘上读取时钟磁头产生的时钟信号将伺服模式写入至少一个盘。 伺服磁道写入器还包括锁相环时钟发生器，与时钟磁道同步并产生用于伺服模式发生器的时钟信号。

公开(公告)号：US06831804B2

公开(公告)日：2004-12-14

申请号：US09810435

申请日：2001-03-16

申请人： Kian Keong Ooi ,  Ming Zhong Ding ,  Lee Ling Tan ,  Wing Kong Chiang ,  Beng Wee Quak ,  Yang Quan Chen

发明人： Kian Keong Ooi ,  Ming Zhong Ding ,  Lee Ling Tan ,  Wing Kong Chiang ,  Beng Wee Quak ,  Yang Quan Chen

IPC分类号： G11B5596

CPC分类号： G11B5/59627 ,  G11B5/5582

摘要： A method of handling resonance effects on disc drives includes the steps of monitoring a position error signal (PES) for an actuator arm of a disc drive, generating a feedforward compensation signal from the PES using a bandpass filter, and applying the compensation signal to a servo control signal. The bandpass filter has a center frequency set to a known resonance frequency. A disc drive includes an actuator assembly including an arm for carrying a head in a transducing relation with respect to a disc in response to a control signal, and a controller that monitors a PES for the arm and generates the control signal. The controller includes a servo controller that generates a servo control signal from the PES, and a feedforward compensation element which bandpass filters the PES to generate a compensation signal which is combined with the servo control signal to generate the control signal.

摘要翻译： 一种处理对磁盘驱动器的共振效应的方法包括以下步骤：监视磁盘驱动器的致动器臂的位置误差信号（PES），使用带通滤波器从PES生成前馈补偿信号，并将补偿信号施加到 伺服控制信号。 带通滤波器具有设置为已知谐振频率的中心频率。 盘驱动器包括致动器组件，该致动器组件包括用于响应于控制信号而携带相对于盘的转换关系的头的臂，以及监控臂的PES并产生控制信号的控制器。 控制器包括产生来自PES的伺服控制信号的伺服控制器，以及前馈补偿元件，其通过对PES进行滤波以产生与伺服控制信号组合以产生控制信号的补偿信号。

公开(公告)号：US06757127B1

公开(公告)日：2004-06-29

申请号：US09648869

申请日：2000-08-25

申请人： Jack Ming Teng ,  Kian Keong Ooi ,  Ming Zhong Ding ,  Wing Kong Chiang ,  Louis Seng Hong Pang ,  Beng Wee Quak

发明人： Jack Ming Teng ,  Kian Keong Ooi ,  Ming Zhong Ding ,  Wing Kong Chiang ,  Louis Seng Hong Pang ,  Beng Wee Quak

IPC分类号： G11B5596

CPC分类号： G11B5/54

摘要： An information handling system, such as a disc drive, includes a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. A region of the disc stack is identified as a parking band, and when power is not provided to the disc drive, the actuator assembly is held in a parked position within the parking band by an actuator latch. The actuator latch and actuator assembly have different resonant frequencies based on several environmental elements near the actuator assembly, including the temperature of the environment in the disc enclosure. The actuator assembly is unlatched by measuring the environmental element near the actuator assembly and applying an alternating current to a voice coil coupled to the actuator. The frequency of the alternating current applied to the actuator assembly during the unlatching procedure is near the resonant frequency of the actuator assembly in the measured environment.

摘要翻译： 诸如盘驱动器的信息处理系统包括基座，可旋转地附接到基座的盘叠和可移动地附接到基座的致动器组件。 盘片堆叠的区域被识别为停车带，并且当没有向盘驱动器提供动力时，致动器组件通过致动器闩锁保持在停车带内的停放位置。 致动器闩锁和致动器组件基于致动器组件附近的几个环境元件具有不同的谐振频率，包括盘盒中的环境温度。 致动器组件通过测量致动器组件附近的环境元件并将交流电流施加到耦合到致动器的音圈来解锁。 在解锁过程中施加到致动器组件的交流电的频率接近测量环境中的致动器组件的谐振频率。

公开(公告)号：US06606213B1

公开(公告)日：2003-08-12

申请号：US09332351

申请日：1999-06-11

申请人： Kian Keong Ooi ,  Jack Ming Teng ,  Soon Wah Leow ,  Ming Zhong Ding

发明人： Kian Keong Ooi ,  Jack Ming Teng ,  Soon Wah Leow ,  Ming Zhong Ding

IPC分类号： G11B2102

CPC分类号： G11B5/59633

摘要： A disc drive system and method of screening an actuator resonance includes a servo controller providing a multi-servo zone architecture. The servo controller partitions the disc into a plurality of servo zones. Each of the servo zones has a corresponding servo gain. When an actuator resonance is detected in one of the servo zones, the servo controller reduces the corresponding servo gain of the detected servo zone such that a drive with very low resonance at a certain zone does not affect the servo bandwidth of the other good zones. Accordingly, a drive with very low resonance is prevented from being scrapped. Further, the screening technique allows a drive to have an adequate servo margin for its normal operation after going through a resonance detection test.

摘要翻译： 盘驱动系统和筛选致动器谐振的方法包括提供多伺服区结构的伺服控制器。 伺服控制器将盘划分成多个伺服区。 每个伺服区具有相应的伺服增益。 当在其中一个伺服区域中检测到致动器谐振时，伺服控制器减小检测到的伺服区域的相应伺服增益，使得在某一区域具有非常低的共振的驱动器不影响其它良好区域的伺服带宽。 因此，防止具有非常低谐振的驱动器被报废。 此外，筛选技术允许驱动器在进行共振检测测试之后具有用于其正常操作的足够的伺服余量。

公开(公告)号：US06597528B1

公开(公告)日：2003-07-22

申请号：US09558265

申请日：2000-04-25

申请人： Louis Seng Hong Pang ,  Kian Keong Ooi ,  Jack Ming Teng ,  Ming Zhong Ding

发明人： Louis Seng Hong Pang ,  Kian Keong Ooi ,  Jack Ming Teng ,  Ming Zhong Ding

IPC分类号： G11B5596

CPC分类号： G11B5/5556

摘要： A disc drive includes a base and a disc rotatably attached to the base. The disc drive also includes an actuator assembly rotatably attached to said base and a device for moving the actuator assembly. The actuator assembly includes a transducer head in a transducing relationship with respect to the disc. The disc drive includes a disc drive controller for controlling movement of the actuator during track follow and track seek operations. The disc drive controller monitors the actuator during seek operations. The disc drive controller further computes a maximum average settle time from the monitored settle times. The dis drive controller further compares the maximum average settle time to a predetermined threshold value, and issues a command signal to adjust seek profile parameters of the disc drive to eliminate resonance in the actuator arm during a seek operation.

摘要翻译： 盘驱动器包括基座和可旋转地附接到基座的盘。 盘驱动器还包括可旋转地附接到所述基座的致动器组件和用于移动致动器组件的装置。 致动器组件包括相对于盘的换能关系的换能器头。 磁盘驱动器包括一个磁盘驱动器控制器，用于在轨道跟踪跟踪寻道操作期间控制致动器的运动。 磁盘驱动器控制器在寻道操作期间监视执行器。 磁盘驱动器控制器还从监视的安置时间计算最大平均安置时间。 驱动控制器进一步将最大平均安定时间与预定阈值进行比较，并且发出命令信号以调整盘驱动器的寻找轮廓参数，以消除在寻道操作期间致动器臂中的共振。

公开(公告)号：US06661599B1

公开(公告)日：2003-12-09

申请号：US09641113

申请日：2000-08-17

申请人： YangQuan Chen ,  Ming Zhong Ding ,  Kian Keong Ooi ,  Ricky Wei Watt Yeo ,  Louis Seng Hong Pang

发明人： YangQuan Chen ,  Ming Zhong Ding ,  Kian Keong Ooi ,  Ricky Wei Watt Yeo ,  Louis Seng Hong Pang

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： A method of producing a modified control signal to an actuator arm assembly of a disc drive to reduce RRO includes the step of generating a correction signal corresponding to a position error signal of a current track. Then to determine a high pass filter transfer function of a high pass filter to decrease a gain of an unwanted frequency generated when increasing a learning gain of the correction signal to achieve a faster convergence without any loss of performance in the disc drive. Then to determine filter parameters from the high pass filter transfer function, and to filter the correction signal by passing the correction signal through the high pass filter to generate a modified control signal to the actuator arm assembly of the disc drive using the filtered correction signal to remove the RRO on a next track.

摘要翻译： 将修正的控制信号产生到盘驱动器的致动器臂组件以减少RRO的方法包括产生对应于当前轨道的位置误差信号的校正信号的步骤。 然后确定高通滤波器的高通滤波器传递函数，以减小在增加校正信号的学习增益时产生的不想要的频率的增益，以实现更快的收敛而不会在盘驱动器中的任何性能损失。 然后从高通滤波器传递函数确定滤波器参数，并通过使校正信号通过高通滤波器来对校正信号进行滤波，以使用滤波校正信号将修正的控制信号产生到盘驱动器的致动器臂组件 在下一个轨道上删除RRO。

公开(公告)号：US08631198B2

公开(公告)日：2014-01-14

申请号：US12852153

申请日：2010-08-06

申请人： Choon Wei Ng ,  Chee Meng Leong ,  Poh Guat Bay ,  June Christian Ang ,  Kian Keong Ooi ,  Wei Kin Wan

发明人： Choon Wei Ng ,  Chee Meng Leong ,  Poh Guat Bay ,  June Christian Ang ,  Kian Keong Ooi ,  Wei Kin Wan

IPC分类号： G06F12/00

CPC分类号： G06F12/0893

摘要： An interface controller of a storage device configured to manage a write cache of the storage device responsive to changes in a voltage supply provided to the storage device. In one implementation, the interface controller reduces the size of the write cache responsive to the voltage supply dropping at or below a first threshold. The interface controller further disables write permissions to the write cache responsive the voltage supply dropping at or below a second threshold, wherein the second threshold is lower in magnitude that the first threshold. The interface controller periodically receives the voltage supply responsive to transmitting sequential requests to a servo firmware of the storage device.

摘要翻译： 一种存储设备的接口控制器，被配置为响应于提供给存储设备的电压供应的变化来管理存储设备的写入高速缓存。 在一个实现中，接口控制器响应于等于或低于第一阈值的电压供应来减小写高速缓存的大小。 接口控制器进一步禁用对写入高速缓存的写入权限，响应于等于或低于第二阈值的电压供应，其中第二阈值的幅度低于第一阈值。 接口控制器响应于向存储设备的伺服固件发送顺序请求而周期性地接收电压供应。

公开(公告)号：US06654198B2

公开(公告)日：2003-11-25

申请号：US09885008

申请日：2001-06-19

申请人： Xiong Liu ,  Kian Keong Ooi ,  ChoonKiat Lim ,  Yangquan Chen ,  Qiang Bi ,  Mingzhong Ding ,  ShuangQuan Min ,  WeiSung Lee

发明人： Xiong Liu ,  Kian Keong Ooi ,  ChoonKiat Lim ,  Yangquan Chen ,  Qiang Bi ,  Mingzhong Ding ,  ShuangQuan Min ,  WeiSung Lee

IPC分类号： G11B5596

CPC分类号： G11B5/59627

摘要： Steps for isolating and correcting total written-in repeatable run-out error written into servo sectors of a disc drive include, determining a total repeatable run-out error value for each servo sector, isolating a repeatable error value component of the total written-in repeatable run-out error value for each servo sector, removing the repeatable error value component from total written-in repeatable run-out error value to provide a non-repeatable error value component of the total written-in repeatable run-out error value for each servo sector, providing both the repeatable and non-repeatable error value components to a processor for generation of compensation signals, and applying the compensation signals into a servo control circuit of control loop of the disc drive using compensation circuits to compensate for each component of the total written-in repeatable run-out error.

公开(公告)号：US20120036328A1

公开(公告)日：2012-02-09

申请号：US12852153

申请日：2010-08-06

申请人： Poh Guat Bay ,  Chee Meng Leong ,  Choon Wei Ng ,  June Christian Ang ,  Kian Keong Ooi ,  Wei Kin Wan

发明人： Poh Guat Bay ,  Chee Meng Leong ,  Choon Wei Ng ,  June Christian Ang ,  Kian Keong Ooi ,  Wei Kin Wan

IPC分类号： G06F12/08

CPC分类号： G06F12/0893

摘要： An interface controller of a storage device configured to manage a write cache of the storage device responsive to changes in a voltage supply provided to the storage device. In one implementation, the interface controller reduces the size of the write cache responsive to the voltage supply dropping at or below a first threshold. The interface controller further disables write permissions to the write cache responsive the voltage supply dropping at or below a second threshold, wherein the second threshold is lower in magnitude that the first threshold. The interface controller periodically receives the voltage supply responsive to transmitting sequential requests to a servo firmware of the storage device.

摘要翻译： 一种存储设备的接口控制器，被配置为响应于提供给存储设备的电压供应的变化来管理存储设备的写入高速缓存。 在一个实现中，接口控制器响应于等于或低于第一阈值的电压供应来减小写高速缓存的大小。 接口控制器进一步禁用对写入高速缓存的写入权限，响应于等于或低于第二阈值的电压供应，其中第二阈值的幅度低于第一阈值。 接口控制器响应于向存储设备的伺服固件发送顺序请求而周期性地接收电压供应。