公开(公告)号：US06324890B1

公开(公告)日：2001-12-04

申请号：US09584563

申请日：2000-05-31

申请人： Ricky Wei Watt Yeo ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  MingZhong Ding ,  YangQuan Chen ,  Beng Wee Quak

发明人： Ricky Wei Watt Yeo ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  MingZhong Ding ,  YangQuan Chen ,  Beng Wee Quak

IPC分类号： G01N3312

CPC分类号： G01N19/02

摘要： A method of characterizing and screening a disc drive based on a voice coil motor pivot friction developed during a low velocity seek operation consists of determining estimated drive level bias values required by the voice coil motor to move an actuator arm assembly during a fast seek, then determining a low velocity drive level bias values required by the voice coil motor to move an actuator arm assembly during a slow seek, then computing a difference between the estimate drive level bias values and the low velocity drive level bias values, then determining a hit counter value based on comparing the computed difference with a predetermined threshold value, and then characterizing the disc drive based on the hit counter value.

摘要翻译： 基于在低速搜索操作期间产生的音圈电动机枢转摩擦来表征和筛选磁盘驱动器的方法包括确定音圈电机在快速寻找期间移动致动器臂组件所需的估计的驱动电平偏置值，然后 确定音速电动机在慢速寻找期间移动致动器臂组件所需的低速驱动电平偏置值，然后计算估计驱动电平偏置值和低速驱动电平偏置值之间的差，然后确定命中计数器 基于计算出的差异与预定阈值进行比较，然后基于命中计数器值表征盘驱动器的值。

公开(公告)号：US06636375B1

公开(公告)日：2003-10-21

申请号：US09584261

申请日：2000-05-31

申请人： MingZhong Ding ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  Ricky Wei Watt Yeo ,  YangQuan Chen

发明人： MingZhong Ding ,  KianKeong Ooi ,  Louis Seng Hong Pang ,  Ricky Wei Watt Yeo ,  YangQuan Chen

IPC分类号： G11B5596

CPC分类号： G11B5/5556

摘要： According to one embodiment of the present invention, a disc drive includes a disc and a transducer supported by an actuator assembly that is accelerated by controlling current in a voice coil. The disc drive controls a position of the transducer over a present track on the disc in a track-and-follow mode, generates an estimated bias current to be applied to the voice coil to balance a bias on the actuator assembly when the transducer is over the present track, starts a movement of the transducer toward a target track in a seek mode, enters the estimated bias current into a bias table if an immediately preceding movement of the transducer in the seek mode was longer than a seek length boundary such that nonlinear friction in a pivot in the actuator assembly is less substantial, and applies a bias current to the voice coil calculated based on a bias current entry in the bias table during the seek mode.

摘要翻译： 根据本发明的一个实施例，盘驱动器包括盘和由致动器组件支撑的换能器，其通过控制音圈中的电流来加速。 磁盘驱动器以跟踪和跟随模式控制盘上的当前磁道上的传感器的位置，产生要施加到音圈的估计偏置电流，以在传感器结束时平衡致动器组件上的偏置 当前轨道在寻道模式下开始朝向目标轨迹的移动，如果在寻找模式中的换能器的紧接在前的移动长于搜索长度边界，则将估计的偏置电流输入到偏置表中，使得非线性 在致动器组件中的枢轴中的摩擦较小，并且在寻道模式期间，基于偏置台中的偏置电流入口计算出的偏置电流到音圈。

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：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：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。