公开(公告)号：US5969494A

公开(公告)日：1999-10-19

申请号：US934516

申请日：1997-09-22

申请人： Chang-Ik Kang

发明人： Chang-Ik Kang

IPC分类号： G11B21/02 ,  G05B23/02 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  H02P3/00

CPC分类号： G11B21/085 ,  G11B5/5547 ,  G11B5/59605 ,  G11B5/59622

摘要： A method of estimating the gain of a servo control system including an actuator, in which input data supplied to the actuator and the actuator's position data are applied to a gain estimate formula in a closed loop discrete value system for controlling the actuator, so as to estimate the gain of the servo control system.

摘要翻译： 一种估计包括致动器的伺服控制系统的增益的方法，其中提供给致动器的输入数据和致动器的位置数据被应用于用于控制致动器的闭环离散值系统中的增益估计公式，以便 估计伺服控制系统的增益。

公开(公告)号：US5818803A

公开(公告)日：1998-10-06

申请号：US888683

申请日：1997-07-07

申请人： Tomoaki Nakamura ,  Terumitsu Okamoto

发明人： Tomoaki Nakamura ,  Terumitsu Okamoto

IPC分类号： G11B21/10 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B7/09

CPC分类号： G11B21/085 ,  G11B5/5534 ,  G11B5/5547 ,  G11B5/59605 ,  G11B5/59627 ,  G11B5/59622

摘要： After application of power or insertion of a medium, a frequency bandpass digital filter extracts the first-order component, which has one period per revolution of the medium, and the second-order component, which has two periods per revolution of the medium, from the carriage operation amount for one revolution of the medium, this being written into a carriage operation amount compensation table. Then, a position error averaging section calculates the average value of a tracking error signal, and a compensation table updating judgment section monitors this position error average value. If the position error average exceeds a prescribed threshold value for a number of consecutive sectors, the second-order component only is updated in the carriage operation amount compensation table. An actuator driving section controls the carriage in accordance with a corrected operation amount obtained by adding the operation amount obtained at the carriage operation amount calculation section and the compensation amount of the carriage compensation table. The results in stable position control of the head, without the influence of ambient temperature changes on the off-track amount.

摘要翻译： 在施加电力或插入介质之后，频带数字滤波器提取介质旋转一周期的一阶分量和介质旋转两圈的二阶分量 将介质一转的托架运算量写入托架运算量补偿表。 然后，位置误差平均部分计算跟踪误差信号的平均值，并且补偿表更新判断部分监视该位置误差平均值。 如果针对多个连续扇区的位置误差平均值超过规定的阈值，则仅在滑架运算量补偿表中更新二阶分量。 执行器驱动部根据通过将在滑架操作量计算部获得的操作量和滑架补偿表的补偿量相加而获得的校正操作量来控制滑架。 结果头部稳定的位置控制，不受环境温度变化影响离轨量。

公开(公告)号：US5796544A

公开(公告)日：1998-08-18

申请号：US752335

申请日：1996-11-19

申请人： David S. McMurtrey

发明人： David S. McMurtrey

IPC分类号： G11B5/596

CPC分类号： G11B5/59605

摘要： Provided is a disk drive with a disk and an actuator assembly on which a communication device is mounted for communication with the disk. Position information read from the disk is processed through a channel that generates an analog position error signal that is then converted to a digital position error signal by a first signal converter. Based on the digital position error signal, a controller determines whether realignment of the communication device with the disk is required. The operation of the first signal converter is only periodically required. When realignment is required, then a digital position control signal is generated by the controller and is then converted to an analog position control signal by a second signal converter, which shares circuitry with the first signal converter. Normally, the second signal converter is operating to realign the communication device. Therefore, the shared circuitry is normally operating as part of the second signal converter. Operation of the shared circuitry between the first signal converter and the second signal converter is switched by a switch controlled by the controller. Based on the analog position control signal, a servo system causes the actuator assembly to reposition the communication device for fine adjustment to maintain proper alignment with the disk.

摘要翻译： 提供了一种具有盘和驱动器组件的盘驱动器，其上安装有用于与盘通信的通信装置。 从磁盘读取的位置信息通过产生模拟位置误差信号的通道进行处理，该信道然后由第一信号转换器转换成数字位置误差信号。 基于数字位置误差信号，控制器确定是否需要与盘通信设备的重新对准。 第一信号转换器的操作只是周期性地需要。 当需要重新对准时，则控制器产生数字位置控制信号，然后由与第一信号转换器共享电路的第二信号转换器转换成模拟位置控制信号。 通常，第二信号转换器正在操作以重新对准通信设备。 因此，共享电路通常作为第二信号转换器的一部分工作。 第一信号转换器和第二信号转换器之间的共享电路的操作由控制器控制的开关切换。 基于模拟位置控制信号，伺服系统使致动器组件重新定位通信装置以进行微调，以保持与盘的适当对准。

公开(公告)号：US5796535A

公开(公告)日：1998-08-18

申请号：US440515

申请日：1995-05-12

申请人： Tyson Tuttle ,  Diwakar Vishakhadatta ,  Jerrel P. Hein ,  David R. Welland ,  David E. Reed ,  Richard T. Behrens ,  William G. Bliss ,  Paul M. Romano ,  Trent O. Dudley ,  Christopher P. Zook

发明人： Tyson Tuttle ,  Diwakar Vishakhadatta ,  Jerrel P. Hein ,  David R. Welland ,  David E. Reed ,  Richard T. Behrens ,  William G. Bliss ,  Paul M. Romano ,  Trent O. Dudley ,  Christopher P. Zook

IPC分类号： G11B5/012 ,  G11B5/09 ,  G11B5/55 ,  G11B5/58 ,  G11B5/596 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14

CPC分类号： G11B20/10055 ,  G11B19/28 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/1403 ,  G11B5/012 ,  G11B5/09 ,  G11B5/5526 ,  G11B5/553 ,  G11B5/5547 ,  G11B5/58 ,  G11B5/59605 ,  G11B5/59622 ,  G11B5/59633 ,  G11B5/59688 ,  G11B20/1258 ,  G11B5/5534 ,  G11B5/5965

摘要： A sampled amplitude read channel incorporated within a magnetic disk storage system for reading data recorded in concentric tracks on a magnetic medium, where the data comprises user data sectors recorded at varying data rates across a plurality of predefined zones and embedded servo data sectors recorded at the same data rate across the zones. The sampled amplitude read channel comprises a timing recovery component for synchronous sampling of a read signal from a magnetic read head positioned over the magnetic medium, a gain control component for adjusting the amplitude of the read signal, and a DC offset component for cancelling a DC offset in the read signal. These components are dynamically configured to operate according to whether the read channel is processing user data or embedded servo data. A user data frequency synthesizer and a servo data frequency synthesizer lock the timing recovery component to a reference frequency and provide a coarse center frequency control signal corresponding to the user data or servo data mode. The read channel further employs pipelined reads to reduce the physical gap between sectors on the medium. In addition, an improved sync mark detector and an improved asynchronous servo address mark detector increase the accuracy and reliability of the read channel.

摘要翻译： 一个结合在磁盘存储系统内的采样幅度读取通道，用于读取记录在磁介质上的同心磁道中的数据，其中数据包括以多个预定义区域中记录的不同数据速率记录的用户数据扇区，以及记录在 相同的数据速率跨区域。 采样振幅读通道包括定时恢复组件，用于对位于磁介质上的磁读头进行读信号的同步采样，用于调整读信号振幅的增益控制部件和用于消除DC的直流偏移分量 在读信号中偏移。 这些组件被动态配置为根据读通道是处理用户数据还是嵌入式伺服数据进行操作。 用户数据频率合成器和伺服数据频率合成器将定时恢复组件锁定到参考频率，并提供对应于用户数据或伺服数据模式的粗略的中心频率控制信号。 读通道还采用流水线读取来减少介质上扇区之间的物理差距。 此外，改进的同步标记检测器和改进的异步伺服地址标记检测器增加读取通道的精度和可靠性。

公开(公告)号：US5377096A

公开(公告)日：1994-12-27

申请号：US991002

申请日：1992-12-16

申请人： Hiroyuki Ono

发明人： Hiroyuki Ono

IPC分类号： G05B19/19 ,  G11B5/596 ,  G05B19/18 ,  G11B21/02

CPC分类号： G11B5/59605 ,  G05B19/19 ,  G05B2219/41013 ,  G05B2219/41144

摘要： The digital actuator controller of the present invention reduces the effect of aliasing peculiar to the digital control by inserting a low-pass filter (LPF), which was considered inadequate in the past, between a digital-to-analog converter and a power amplifier to thereby reduce the gain in the high frequency region.

摘要翻译： 本发明的数字致动器控制器通过在数模转换器和功率放大器之间插入过去认为不足的低通滤波器（LPF）来降低数字控制特有的混叠效应， 从而降低高频区域的增益。

公开(公告)号：US5014145A

公开(公告)日：1991-05-07

申请号：US214679

申请日：1988-07-01

申请人： Haruhiko Hosokawa ,  Asao Sasamoto ,  Hideaki Amano ,  Toshio Shiono ,  Akio Takatsuka ,  Sigeru Okamoto ,  Munesige Maeda ,  Chikayuki Sogabe

发明人： Haruhiko Hosokawa ,  Asao Sasamoto ,  Hideaki Amano ,  Toshio Shiono ,  Akio Takatsuka ,  Sigeru Okamoto ,  Munesige Maeda ,  Chikayuki Sogabe

IPC分类号： G11B21/16 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/02 ,  H05K1/02

CPC分类号： G11B5/486 ,  G11B5/5565 ,  H05K1/0271 ,  G11B5/553 ,  G11B5/59605 ,  H05K2201/09063 ,  H05K2201/10689

摘要： A head positioning system includes data head arms for supporting a data head, support head arms for supporting a support head, and a head actuator for rigidly moving the data and servo head arms as a unitary structure. When there is mounted an amplifier or the like is mounted on at least one of the head arms to change the warping amount depending upon the change in the environmental temperature, a portion of the head arm on which the amplifier is mounted is cut away therefrom but is left partly connected thereto, so that the head arms are all warped in nearly the same amount.

摘要翻译： 头定位系统包括用于支撑数据头的数据头臂，用于支撑支撑头的支撑头臂和用于将数据和伺服头臂刚性地移动为一体结构的头致动器。 当安装放大器等安装在至少一个头臂上以根据环境温度的变化来改变翘曲量时，安装放大器的头臂的一部分被切除，但是 被部分地连接到其上，使得头臂全部翘曲成几乎相同的量。

公开(公告)号：US20120014232A1

公开(公告)日：2012-01-19

申请号：US13243840

申请日：2011-09-23

申请人： Pi-Hai LIU ,  Chun-Nan Chen

发明人： Pi-Hai LIU ,  Chun-Nan Chen

IPC分类号： G11B7/007

CPC分类号： G11B5/59605 ,  G11B5/5526 ,  G11B2220/2541

摘要： An address-accessing device includes first and second information generators for producing first and second information according to the received address signals; a phase offset detector for producing a phase offset according to the first and second information; a reference signal generator for producing a reference signal according to the phase offset, the first information and the second information; and a decoder used to determine the structure type of an address-in-pregroove unit (ADIP) according to the reference value. This address-accessing device is capable of adjusting the decision level and the phase offset automatically to lower the error rate occurring in the address access procedure.

摘要翻译： 地址访问装置包括根据接收到的地址信号产生第一和第二信息的第一和第二信息发生器; 相位偏移检测器，用于根据第一和第二信息产生相位偏移; 参考信号发生器，用于根据相位偏移产生参考信号，第一信息和第二信息; 以及用于根据参考值确定预输入地址单元（ADIP）的结构类型的解码器。 该地址访问装置能够自动调整判定级别和相位偏移，以降低在地址访问过程中发生的错误率。

公开(公告)号：US20100290153A1

公开(公告)日：2010-11-18

申请号：US12467742

申请日：2009-05-18

申请人： Randall David Hampshire

发明人： Randall David Hampshire

IPC分类号： G11B5/596

CPC分类号： G11B5/59605

摘要： The operational bandwidth of a servo control circuit can be increased using a plurality of servo processors that handoff between them the responsibility for controlling head positioning in response to sequentially occurring servo patterns.

摘要翻译： 可以使用多个伺服处理器来增加伺服控制电路的操作带宽，所述多个伺服处理器响应于顺序发生的伺服模式来控制头部定位的责任。

公开(公告)号：US07773334B1

公开(公告)日：2010-08-10

申请号：US11999416

申请日：2007-12-05

申请人： David Rutherford

发明人： David Rutherford

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59605 ,  G11B5/59666

摘要： A self-servo-write (SSW) system of a hard disk drive (HDD) includes a timing control module and a position control module. The timing control module generates timing information of S servo spirals and generates timing control signals for writing F final servo wedges in a circle based on the timing information, where F and S are integers, and where F is greater than S. The position control module generates position information of the S servo spirals and generates positioning control signals for writing the F final servo wedges in the circle based on the timing information.

摘要翻译： 硬盘驱动器（HDD）的自伺服写入（SSW）系统包括定时控制模块和位置控制模块。 定时控制模块生成S伺服螺旋的定时信息，并且基于定时信息生成用于将F最终伺服楔形写入圆的定时控制信号，其中F和S是整数，并且其中F大于S.位置控制模块 产生S伺服螺旋的位置信息，并产生用于基于定时信息将F个最终伺服楔形件写入圆中的定位控制信号。

公开(公告)号：US07538968B2

公开(公告)日：2009-05-26

申请号：US11750861

申请日：2007-05-18

申请人： Makoto Asakura ,  Hideo Sado

发明人： Makoto Asakura ,  Hideo Sado

IPC分类号： G11B5/596

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/59605 ,  G11B5/59616 ,  G11B5/59633 ,  G11B5/59655 ,  G11B5/743 ,  G11B20/1217 ,  G11B20/1403 ,  G11B2020/1232 ,  G11B2020/1248 ,  G11B2020/1267 ,  G11B2020/1284 ,  G11B2220/2516

摘要： A magnetic recording medium includes a servo area where servo data used for detecting a position of a magnetic head on a magnetic recording medium is recorded; and a writable data area, arranged side by side with the servo area in a track direction, on which user data is written by the magnetic head. The servo area includes a preamble area where a preamble recording pattern that represents data used for providing a clock synchronization of the servo data is formed by a plurality of magnetic sections; and a burst area where data used for detecting a relative position of the magnetic head with respect to a track center position of the servo data is recorded and on which a single burst recording pattern which is a layout pattern that tilts to the preamble recording pattern with a predetermined tilt angle is formed by a plurality of magnetic sections.