公开(公告)号：US07158325B1

公开(公告)日：2007-01-02

申请号：US10984559

申请日：2004-11-08

申请人： Xiaoping Hu ,  Yu Sun ,  Lin Guo ,  Don Brunnett

发明人： Xiaoping Hu ,  Yu Sun ,  Lin Guo ,  Don Brunnett

IPC分类号： G11B15/18

CPC分类号： G11B5/59627 ,  G11B5/6076

摘要： A disk drive detects head touchdown based on a magnitude of a position error signal at a discrete frequency. The discrete frequency is one-half the disk rotation frequency or an integral multiple of the disk rotation frequency. The head is heated by turning on a heater at the discrete frequency, thereby injecting bias into a servo system that increases the PES magnitude. In addition, the servo system has a first transfer function for tracking the head during read and write operations and a second transfer function for tracking the head during head touchdown detection. The second transfer function has smaller vibration rejection than the first transfer function so that the disk drive is less sensitive to vibration during read and write operations than during head touchdown detection.

摘要翻译： 磁盘驱动器基于离散频率处的位置误差信号的大小来检测磁头触地。 离散频率是磁盘旋转频率的一半或磁盘旋转频率的整数倍。 通过以离散频率打开加热器来加热头部，从而将偏压注入到增加PES量值的伺服系统中。 此外，伺服系统具有用于在读取和写入操作期间跟踪头部的第一传递功能，以及用于在头部触地检测期间跟踪头部的第二传递功能。 第二传递函数具有比第一传递函数更小的振动抑制，使得磁盘驱动器在读取和写入操作期间比在头部触地检测期间对振动较不敏感。

公开(公告)号：US07145745B1

公开(公告)日：2006-12-05

申请号：US10932717

申请日：2004-09-02

申请人： Stan Shepherd ,  Jason Adler ,  Lin Guo ,  Xiaoping Hu ,  Yu Sun

发明人： Stan Shepherd ,  Jason Adler ,  Lin Guo ,  Xiaoping Hu ,  Yu Sun

IPC分类号： G11B5/596

CPC分类号： G11B5/5552

摘要： Methods of compensating for repeatable runout in a disk drive are provided. The disk drive includes a data storage disk, a transducer adjacent to the disk, a primary actuator for positioning the transducer over a first range of movement, and a secondary actuator for positioning the transducer over a second range of movement that is less than the first range of movement. Estimates are made of the position of the secondary actuator in the second range of movement. Data is read from the disk via the transducer. A position error signal is determined based on the read data. Positioning of the transducer by the primary actuator is controlled based on the estimated position of the secondary actuator in the second range of movement and based on the position error signal to compensate for repeatable runout.

摘要翻译： 提供补偿磁盘驱动器中可重复跳动的方法。 磁盘驱动器包括数据存储盘，与盘相邻的换能器，用于在第一移动范围上定位换能器的主致动器，以及辅助致动器，用于将传感器定位在比第一移动范围小的第二移动范围 运动范围 在第二运动范围内由次级致动器的位置进行估计。 通过传感器从磁盘读取数据。 基于读取的数据确定位置误差信号。 基于在第二移动范围内的辅助致动器的估计位置并且基于位置误差信号来控制由主致动器定位换能器，以补偿可重复的跳动。

公开(公告)号：US07643239B2

公开(公告)日：2010-01-05

申请号：US11789680

申请日：2007-04-25

申请人： Yu Sun ,  Xiaoping Hu

发明人： Yu Sun ,  Xiaoping Hu

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59627 ,  G11B5/59633 ,  G11B5/59666

摘要： Embodiments of the present invention reduce the written-in run-out in servo data written to a storage medium. A set of servo controllers are evaluated and the controller having the best expected performance among the set is selected and employed. One embodiment of the present invention is a servo controller configured to select and employ a controller having a least amount of expected written-in run-out among a set of controllers. Another embodiment of the present invention is a method comprising a step for applying a set of controllers; and selecting a controller from the set of controllers with a least expected amount of written-in run out. Another embodiment of the present invention is a system comprising a servo controller for employing and selecting a disk controller that has a least expected amount of written-in run-out among a set of controllers.

摘要翻译： 本发明的实施例减少写入存储介质的伺服数据的写入跳动。 评估一组伺服控制器，并选择并采用具有最佳预期性能的控制器。 本发明的一个实施例是一种伺服控制器，被配置为在一组控制器中选择和使用具有最少量的预期写入跳动的控制器。 本发明的另一实施例是一种方法，包括：应用一组控制器的步骤; 以及从所述一组控制器中选择具有最少预期的写入用完量的控制器。 本发明的另一实施例是一种包括伺服控制器的系统，该伺服控制器用于采用和选择在一组控制器中具有最少预期的写入跳动量的磁盘控制器。

公开(公告)号：US07215499B1

公开(公告)日：2007-05-08

申请号：US11180283

申请日：2005-07-13

申请人： Yunfeng Li ,  Yu Sun ,  Lin Guo ,  Xiaoping Hu

发明人： Yunfeng Li ,  Yu Sun ,  Lin Guo ,  Xiaoping Hu

IPC分类号： G11B21/02

CPC分类号： G11B5/5547 ,  G11B5/5552

摘要： A disk drive and method are provided for controlling seeking of a transducer that is adjacent to a rotatable data storage disk in a disk drive. The disk drive includes an actuator for positioning the transducer relative to the disk, the method comprising. The actuator is controlled to move the transducer toward a target track on the disk during an initial phase of a seek mode during which the transducer is primarily accelerated toward the target track. During a settle phase of the seek mode which follows the initial phase the actuator is controlled to settle the transducer onto the target track. An initial position, an initial velocity, and an initial acceleration of the transducer are determined at a phase switch time at about when control of the actuator switches from the initial phase to the settle phase of the seek mode. Feed-forward control information is generated based on the determined initial position, initial velocity, and initial acceleration of the transducer. The actuator is controlled responsive to the feed-forward control information to settle the transducer onto the target track during the settle phase of the seek mode.

摘要翻译： 提供了一种磁盘驱动器和方法，用于控制寻找与磁盘驱动器中的可旋转数据存储盘相邻的换能器。 磁盘驱动器包括用于相对于盘定位换能器的致动器，该方法包括。 在寻像模式的初始阶段期间，致动器被控制以将传感器移向盘上的目标轨道，在该模式期间，换能器主要朝向目标轨道加速。 在跟随初始阶段的搜索模式的稳定阶段期间，致动器被控制以将换能器定位到目标轨道上。 在致动器的控制从寻找模式的初始阶段到稳定阶段切换的时刻，在相位切换时刻确定换能器的初始位置，初始速度和初始加速度。 基于确定的换能器的初始位置，初始速度和初始加速度产生前馈控制信息。 响应于前馈控制信息控制致动器，以在搜索模式的稳定阶段期间将换能器稳定在目标轨道上。

公开(公告)号：US07116513B1

公开(公告)日：2006-10-03

申请号：US10999552

申请日：2004-11-30

申请人： Yu Sun ,  Lin Guo ,  Xiaoping Hu

发明人： Yu Sun ,  Lin Guo ,  Xiaoping Hu

IPC分类号： G11B5/596

CPC分类号： G11B5/5582 ,  G11B19/04

摘要： A disk drive includes a transducer and a rotatable disk, which includes a plurality of tracks. A vibration state of the transducer relative to the disk is determined. The transducer is positioned relative one of the tracks based on a compensation scheme that varies based on the determination of the vibration state. The compensation scheme may be varied by selecting among output of two or more compensators, based on the determined of the vibration state of the transducer, to control positioning of the transducer. The compensation scheme may alternatively, or additionally, be varied by varying a contribution from a vibration state actuator compensator to the control of positioning of the transducer. The vibration state actuator compensator is configured to improve transducer track following while the transducer is subjected to vibration.

摘要翻译： 磁盘驱动器包括换能器和可旋转盘，其包括多个轨道。 确定换能器相对于盘的振动状态。 基于基于振动状态的确定而变化的补偿方案，换能器相对于轨道定位。 可以通过基于确定的换能器的振动状态来选择两个或多个补偿器的输出来改变补偿方案，以控制换能器的定位。 可以通过改变从振动状态致动器补偿器对转换器的定位的控制的贡献来替代或另外地改变补偿方案。 振动状态致动器补偿器配置成在传感器经受振动时改善传感器轨迹跟随。

公开(公告)号：US20070297087A1

公开(公告)日：2007-12-27

申请号：US11789680

申请日：2007-04-25

申请人： Yu Sun ,  Xiaoping Hu

发明人： Yu Sun ,  Xiaoping Hu

IPC分类号： G11B21/02

CPC分类号： G11B5/59627 ,  G11B5/59633 ,  G11B5/59666

摘要： Embodiments of the present invention reduce the written-in run-out in servo data written to a storage medium. A set of servo controllers are evaluated and the controller having the best expected performance among the set is selected and employed. One embodiment of the present invention is a servo controller configured to select and employ a controller having a least amount of expected written-in run-out among a set of controllers. Another embodiment of the present invention is a method comprising a step for applying a set of controllers; and selecting a controller from the set of controllers with a least expected amount of written-in run out. Another embodiment of the present invention is a system comprising a servo controller means for employing and selecting a disk controller that has a least expected amount of written-in run-out among a set of controllers.

摘要翻译： 本发明的实施例减少写入存储介质的伺服数据的写入跳动。 评估一组伺服控制器，并选择并采用具有最佳预期性能的控制器。 本发明的一个实施例是一种伺服控制器，被配置为在一组控制器中选择和使用具有最少量的预期写入跳动的控制器。 本发明的另一实施例是一种方法，包括：应用一组控制器的步骤; 以及从所述一组控制器中选择具有最少预期的写入用完量的控制器。 本发明的另一个实施例是一种系统，包括一个伺服控制器装置，用于采用和选择一组控制器中具有最少预期的写入跳动量的磁盘控制器。

公开(公告)号：US20070253097A1

公开(公告)日：2007-11-01

申请号：US11789500

申请日：2007-04-25

申请人： Yu Sun ,  Xiaoping Hu

发明人： Yu Sun ,  Xiaoping Hu

IPC分类号： G11B5/596

CPC分类号： G11B5/5552

摘要： Embodiments of the present invention allow for controlling a microactuator based at least in part on an output of a temperature sensor. Also, embodiments of the present invention allow for adjusting a control of a microactuator so as to compensate for changes in a gain of the microactuator due to changes in temperature.

摘要翻译： 本发明的实施例允许至少部分地基于温度传感器的输出来控制微致动器。 此外，本发明的实施例允许调节微致动器的控制，以便补偿由于温度变化引起的微致动器的增益的变化。

公开(公告)号：US07538971B2

公开(公告)日：2009-05-26

申请号：US11789500

申请日：2007-04-25

申请人： Yu Sun ,  Xiaoping Hu

发明人： Yu Sun ,  Xiaoping Hu

IPC分类号： G11B5/596

CPC分类号： G11B5/5552

摘要： Embodiments of the present invention allow for controlling a microactuator based at least in part on an output of a temperature sensor. Also, embodiments of the present invention allow for adjusting a control of a microactuator so as to compensate for changes in a gain of the microactuator due to changes in temperature.

摘要翻译： 本发明的实施例允许至少部分地基于温度传感器的输出来控制微致动器。 此外，本发明的实施例允许调节微致动器的控制，以便补偿由于温度变化引起的微致动器的增益的变化。

公开(公告)号：US07474496B1

公开(公告)日：2009-01-06

申请号：US11429427

申请日：2006-05-05

申请人： Yu Sun ,  Xiaoping Hu

发明人： Yu Sun ,  Xiaoping Hu

IPC分类号： G11B5/596 ,  G11B15/18

CPC分类号： G11B5/5556 ,  G11B5/5534 ,  G11B5/59655

摘要： A servo system for a hard disk drive comprising a first actuator, a second actuator, a head, and a disk on which is formed a plurality of tracks containing servo data. The servo system comprises a first stimulus, a second stimulus, and a calibration system. The first stimulus causes the first actuator to move the head to at least two calibration tracks on the disk. The second stimulus causes the second actuator to move the head relative to the at least two calibration tracks. The calibration system generates a calibration factor based on the second calibration signal and the movement of the second actuator relative to each of the at least two calibration tracks.

摘要翻译： 一种用于硬盘驱动器的伺服系统，包括第一致动器，第二致动器，头部和盘，其上形成有包含伺服数据的多个轨道。 伺服系统包括第一刺激，第二刺激和校准系统。 第一个刺激使第一个致动器将磁头移动到磁盘上的至少两个校准磁道。 第二刺激使得第二致动器相对于至少两个校准轨道移动头部。 所述校准系统基于所述第二校准信号和所述第二致动器相对于所述至少两个校准轨道中的每一个产生校准因子。

公开(公告)号：US07012780B1

公开(公告)日：2006-03-14

申请号：US11070783

申请日：2005-03-02

申请人： Xiaoping Hu ,  Yu Sun ,  Lin Guo ,  Donald Brunett

发明人： Xiaoping Hu ,  Yu Sun ,  Lin Guo ,  Donald Brunett

IPC分类号： G11B5/596

CPC分类号： G11B5/5552 ,  G11B5/4886

摘要： A disk drive includes a data storage disk, a transducer, a micro actuator, a coarse actuator, and a controller. The micro actuator is configured to position the transducer relative to the disk over a first range of movement. The coarse actuator is configured to position the micro actuator relative to the disk over a second range of movement that is larger than the first range of movement. The controller is configured to control positioning of the transducer by the coarse actuator and the micro actuator in a track following operation, and in a seek operation responsive to a seek command. The controller is also configured to calibrate its positioning of the transducer by the micro actuator responsive to receipt of the seek command and prior to seeking the transducer from an initial track to a target track.

摘要翻译： 磁盘驱动器包括数据存储盘，换能器，微执行器，粗执行器和控制器。 微致动器构造成在第一移动范围上相对于盘定位换能器。 粗致动器被构造成在比第一移动范围大的第二移动范围内相对于盘定位微致动器。 控制器被配置为通过粗略致动器和微型致动器在跟踪操作中控制换能器的定位，以及响应于寻道命令的寻道操作。 控制器还被配置为响应于接收到寻道命令并且在从初始轨迹到目标轨道寻找换能器之前，通过微执行器校准其换能器的定位。