专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

US20230335158A1 SECTOR METRICS TO ESTIMATE HEALTH OF WRITTEN DATA 审中-公开
公开(公告)号：US20230335158A1
公开(公告)日：2023-10-19
申请号：US17723263
申请日：2022-04-18
申请人： Western Digital Technologies, Inc.
发明人： Niranjay Ravindran , Weldon M. Hanson , Hiroyasu Masuda , David T. Flynn , Zarko Popov
IPC分类号： G11B5/55
CPC分类号： G11B5/556 , G11B5/5573 , G11B5/5586
摘要： Various illustrative aspects are directed to a data storage device comprising data tracks N and N−1, and one or more processing devices, configured to identify, during a track write on the data track N, a write abort event based upon an expected risk for the data track N−1 exceeding a risk threshold, read one or more sectors of the data track N−1 and collect one or more corresponding sector metrics, verify the one or more sectors based upon the collected sector metrics, wherein the verifying comprises assigning each of the one or more sectors as one of a readable or a non-readable sector, and continue the track write on the data track N upon determining each of the one or more sectors is a readable sector, or recovering and relocating the data track N−1 based on determining at least one of the sectors is a non-readable sector.

2. 发明授权

US10872629B2 Data storage device coupling/decoupling actuator arm to/from an actuator 有权
公开(公告)号：US10872629B2
公开(公告)日：2020-12-22
申请号：US16750329
申请日：2020-01-23
申请人： Western Digital Technologies, Inc.
发明人： David R. Hall
IPC分类号： G11B5/55 , G11B5/596 , G11B5/48
CPC分类号： G11B5/556 , G11B5/5573 , G11B5/59688 , G11B5/484 , G11B5/4813 , G11B5/4826 , G11B5/5578
摘要： A data storage device is disclosed comprising a first disk surface, a first actuator arm, a first head connected to a distal end of the first actuator arm, an actuator, and a first coupler configured to couple the first actuator arm to the actuator. The first coupler is actuated in order to couple the first actuator arm to the actuator during at least part of a seek interval, and while the first actuator arm is coupled to the actuator, the actuator is moved in order to seek the first head over the first disk surface.

3. 发明申请

US20170352370A1 HYSTERESIS COMPENSATION IN A DISC DRIVE 审中-公开
公开(公告)号：US20170352370A1
公开(公告)日：2017-12-07
申请号：US15670942
申请日：2017-08-07
申请人： SEAGATE TECHNOLOGY LLC
发明人： REED D. HANSON , KENNETH A. HAAPALA , DWIGHT R. KINNEY , XINGHUI HUANG
IPC分类号： G11B5/55 , G11B5/596 , G11B5/48
CPC分类号： G11B5/556 , G11B5/4873 , G11B5/59622
摘要： Systems and methods for compensating for hysteresis in a disc drive are described. In one embodiment, a method may use an inverse hysteresis model to linearize effects of hysteresis of a microactuator in the disc drive. The hysteresis model may be a Coleman-Hodgdon hysteresis model. The hysteresis of the microactuator may be characterized, and the inverse hysteresis model may be based at least in part on the characterization. The inverse hysteresis model may be used to implement a digital filter. The digital filter may be employed in series with the microactuator to linearize the effects of hysteresis.

4. 发明授权

US09542966B1 Data storage devices and methods with frequency-shaped sliding mode control 有权
标题翻译：具有频率滑动模式控制的数据存储设备和方法
公开(公告)号：US09542966B1
公开(公告)日：2017-01-10
申请号：US14828255
申请日：2015-08-17
申请人： The Regents of the University of California , Western Digital Technologies, Inc.
发明人： Minghui Zheng , Masayoshi Tomizuka , Xu Chen , Wei Xi , Guoxiao Guo
IPC分类号： G11B21/02 , G11B5/596 , G11B20/10
CPC分类号： G11B5/556 , G11B5/4873 , G11B5/59622 , G11B5/59694
摘要： A data storage device includes a disk, a head, a microactuator, a coarse actuator, and a servo controller. The microactuator is configured to position the head relative to the disk. The coarse actuator is configured to position the microactuator relative to the disk. The servo controller is configured to generate an adjusted position error signal based on a position error signal and an estimated microactuator position signal. The servo controller is also configured to filter the adjusted position error signal with a shaping filter to generate a filtered position error signal, and to provide sliding mode control of the coarse actuator based at least partially on the filtered position error signal.
摘要翻译：数据存储装置包括盘，头，微致动器，粗致动器和伺服控制器。微型致动器被配置成相对于盘定位头部。粗致动器被配置成相对于盘定位微致动器。伺服控制器被配置为基于位置误差信号和估计的微型致动器位置信号产生调整的位置误差信号。伺服控制器还被配置为利用整形滤波器对调整的位置误差信号进行滤波，以产生滤波位置误差信号，并且至少部分地基于滤波位置误差信号提供粗略致动器的滑动模式控制。

5. 发明授权

US09142225B1 Electronic system with actuator control mechanism and method of operation thereof 有权
标题翻译：具有执行器控制机构的电子系统及其操作方法
公开(公告)号：US09142225B1
公开(公告)日：2015-09-22
申请号：US14308373
申请日：2014-06-18
申请人： Western Digital Technologies, Inc.
发明人： Min Chen , Alexander Babinski , Yanan Huang , Young-Hoon Kim , Duc T. Phan , Jifang Tian
IPC分类号： G11B5/09 , G11B5/55
CPC分类号： G11B5/5539 , G11B5/483 , G11B5/556
摘要： An apparatus includes: a media; a head over the media; a primary-actuator coupled to the head; and control circuitry, coupled to the primary-actuator and a secondary-actuator, configured to limit a secondary-actuator slew rate.
摘要翻译：一种装置包括：媒体; 媒体头耦合到头部的主致动器; 以及耦合到初级致动器和辅助致动器的控制电路，其被配置为限制辅助致动器转换速率。

6. 发明申请

US20080259491A1 Magnetic disk drive 失效
标题翻译：磁盘驱动器
公开(公告)号：US20080259491A1
公开(公告)日：2008-10-23
申请号：US12148008
申请日：2008-04-15
申请人： Masashi Kisaka
发明人： Masashi Kisaka
IPC分类号： G11B5/55
CPC分类号： G11B5/556 , G11B5/4873
摘要： Embodiments of the present invention help to provide a magnetic disk drive that is capable of reducing a time period necessary for positioning a magnetic head when positioning the magnetic head by use of a dual-stage actuator. According to one embodiment, a main control circuit of a magnetic head device selects one of a seek mode and a positioning mode. The seek mode is to set a coarse adjustment control system to be a stable system by not causing control of a piezoelectric actuator to be performed by a fine adjustment control circuit. The positioning mode is to set the coarse adjustment control system to be an unstable system and setting a total control system inclusive of the coarse adjustment control system and a fine adjustment control system to be the stable system by causing the control of the piezoelectric actuator to be performed by the fine adjustment control circuit. Thereby the main control circuit causes the control system to operate.
摘要翻译：本发明的实施例有助于提供一种磁盘驱动器，该磁盘驱动器能够通过使用双级致动器来定位磁头来减少用于定位磁头所需的时间段。根据一个实施例，磁头装置的主控电路选择搜索模式和定位模式之一。搜索模式是通过不由微调控制电路执行压电致动器的控制来将粗调控制系统设置为稳定的系统。定位模式是将粗调控制系统设置为不稳定的系统，并通过使压电致动器的控制成为稳定系统，将粗调控制系统和微调控制系统的整体控制系统设定为稳定系统由微调控制电路执行。由此，主控制电路使控制系统工作。

7. 发明申请

US20080088965A1 ONLINE IDENTIFICATION OF SECONDARY ACTUATOR TRANSFER FUNCTION VIA SYSTEM DECOUPLING IN MULTIPLE-STAGE ACTUATOR SERVO SYSTEMS IN DISK DRIVES 失效
标题翻译：二级执行机构传输功能的在线识别通过系统解码在多台驱动器伺服系统中的驱动
公开(公告)号：US20080088965A1
公开(公告)日：2008-04-17
申请号：US11580635
申请日：2006-10-12
申请人： Young Hoon Kim , Sang Hoon Chu , Dong-Jun Lee , Hyung Jai Lee
发明人： Young Hoon Kim , Sang Hoon Chu , Dong-Jun Lee , Hyung Jai Lee
IPC分类号： G11B5/596 , G11B21/02
CPC分类号： G11B5/556 , G11B5/59688
摘要： A hard disk drive that includes a voice coil motor and a micro-actuator. The micro-actuator is controlled by a servo that utilizes a micro-actuator controller and a corresponding micro-actuator transfer function. The servo enters a mode to self-determine at least one transfer function coefficient of the micro-actuator controller.
摘要翻译：包括音圈电机和微执行器的硬盘驱动器。微型致动器由利用微执行器控制器和相应微致动器传递功能的伺服控制。伺服进入模式以自行确定微致动器控制器的至少一个传递函数系数。

8. 发明申请

US20060039079A1 Magnetic disk apparatus with dual stage actuator 有权
标题翻译：带双级执行器的磁盘设备
公开(公告)号：US20060039079A1
公开(公告)日：2006-02-23
申请号：US11200999
申请日：2005-08-09
申请人： Masahito Kobayashi , Shinsuke Nakagawa , Hidehiko Numasato , Yoshio Soyama
发明人： Masahito Kobayashi , Shinsuke Nakagawa , Hidehiko Numasato , Yoshio Soyama
IPC分类号： G11B5/596
CPC分类号： G11B5/596 , G11B5/556
摘要： In one embodiment, a magnetic disk apparatus comprises a magnetic disk for recording information; a magnetic head that reads information from, or writes information to, the magnetic disk; an actuator device that drives the magnetic head; and a control system that controls the driving of the actuator device. The actuator device is configured by a dual stage actuator comprising a fine actuator that drives the head and a coarse actuator that drives the magnetic head together with the fine actuator. The control system includes a fine controller that generates an operational value for driving the fine actuator and a coarse controller that generates an operational amount for driving the coarse actuator. The control system includes a mechanism for smoothly changing the operational amount generated by the fine controller immediately before saturation resulting from an applied voltage limit of the fine actuator or at the time the fine actuator returns to a control range from the saturation.
摘要翻译：在一个实施例中，磁盘装置包括用于记录信息的磁盘; 从磁盘读取信息或将信息写入磁盘的磁头; 驱动磁头的致动器装置; 以及控制致动器装置的驱动的控制系统。致动器装置由双级致动器构成，该双级致动器包括驱动头部的精细致动器和与精细致动器一起驱动磁头的粗略致动器。该控制系统包括产生用于驱动精细致动器的操作值的精细控制器和产生用于驱动粗动作器的操作量的粗略控制器。该控制系统包括一个机构，用于在精细致动器施加的电压极限之前或在精细致动器从饱和状态返回到控制范围时，立即在精确控制器产生的精确控制器之前平滑地改变操作量。

9. 发明授权

US06865051B2 Head position control method and disk storage device 有权
标题翻译：头位置控制方法和磁盘存储装置
公开(公告)号：US06865051B2
公开(公告)日：2005-03-08
申请号：US10374148
申请日：2003-02-25
申请人： Kazuhiko Takaishi
发明人： Kazuhiko Takaishi
IPC分类号： G11B21/08 , G11B5/596 , G11B7/085 , G11B7/095 , G11B21/10
CPC分类号： G11B7/0953 , G11B5/556 , G11B5/59627 , G11B7/08529
摘要： A disk device has eccentric misalignment between a plurality of disk surfaces. In order to prevent transient phenomena due to differences in the eccentric trajectories during head switching, a head position control method performs feed forward control for a plurality of disk surfaces by application of the eccentricity correction current of respective heads, and when switching heads, predicts the velocity fluctuation or current step differential between heads from the eccentricity correction current, and thus corrects the control system to eliminate velocity fluctuation and current step differential.
摘要翻译：磁盘装置在多个磁盘表面之间具有偏心的未对准。为了防止在磁头切换期间由于偏心轨迹的差异引起的瞬态现象，磁头位置控制方法通过应用各个磁头的偏心校正电流对多个磁盘表面进行前馈控制，并且当切换磁头时，预测偏心校正电流之间的速度波动或电流阶差，从而校正控制系统以消除速度波动和电流差动。

10. 发明授权

US5012362A Apparatus for positioning a transducer for recording, reproducing or erasing information on a medium 失效
标题翻译：用于定位用于在介质上记录，再现或擦除信息的换能器的装置
公开(公告)号：US5012362A
公开(公告)日：1991-04-30
申请号：US205165
申请日：1988-06-10
申请人： Masatoshi Ida
发明人： Masatoshi Ida
IPC分类号： G11B5/024 , G11B5/55
CPC分类号： G11B5/024 , G11B5/5521 , G11B5/556
摘要： An apparatus of the invention is capable of shifting a transducer, such as a head for erasing, reproducing and recording information on a track formed on a recording medium, with fine positioning accuracy and high access speed. Further, the apparatus is capable of entirely erasing information to be erased on the medium by shifting the transducer with a desired degree while the transducer is excited for erasing operation. In the apparatus, a motion converting means, such as a disc cam or a helically grooved cylindrical cam, is employed for converting a primary rotating motion to a secondary stepwise motion so as to shift the transducer, presenting substantial dead band characteristics for the shifting motion. Further, a control means is employed for shifting the transducer over an area covering an information recorded track and the portions adjacent thereto to execute the erasing operation for an extended area along the track to be erased.
摘要翻译：本发明的装置能够以精确的定位精度和高存取速度，在形成在记录介质上的轨道上移动诸如用于擦除，再现和记录信息的磁头的换能器。此外，当换能器被激发以进行擦除操作时，该装置能够完全擦除在介质上要被擦除的信息以便以期望的程度移动换能器。在该装置中，使用诸如盘式凸轮或螺旋槽式圆柱形凸轮的运动转换装置将初级旋转运动转换成次级逐步运动，以便使换能器移动，从而为换档运动提供大量死区特性。此外，采用控制装置在覆盖信息记录轨道的区域和与其相邻的部分上的区域上移动换能器，以沿着要被擦除的轨道的延伸区域执行擦除操作。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式