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公开(公告)号：US20240257832A1
公开(公告)日：2024-08-01
申请号：US18456496
申请日：2023-08-27
CPC分类号： G11B5/4833 , G11B5/56
摘要： According to an embodiment, a magnetic disk device includes: a magnetic disk; an arm; a support member provided at a distal end of the arm; a magnetic head provided on the support member and configured to access the magnetic disk; a first actuator configured to rotate the arm; a second actuator configured to drive the support member; and one or more processors configured to implement a controller configured to perform seek control of the magnetic head. The controller includes: a feedback controller configured to control a first command value for driving the first actuator so as to reduce an error between a position of the magnetic head and a target position; and an iterative learning controller configured to receive an input value based on the error and output a second command value for driving the second actuator by iterative learning.
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公开(公告)号：US12046256B2
公开(公告)日：2024-07-23
申请号：US18232113
申请日：2023-08-09
发明人： Satoshi Yamamoto
CPC分类号： G11B5/59627 , G11B5/56 , G11B5/596 , G11B5/59666
摘要： Various illustrative aspects are directed to a data storage device, comprising one or more disks; an actuator mechanism configured to position one or more heads proximate to a corresponding disk surface of the one or more disks; and one or more processing devices. The one or more processing devices comprise read/write circuitry which comprises an asynchronous demodulation module. The asynchronous demodulation module is configured to receive demodulated null burst signals based on the selected head reading servo burst fields of the corresponding disk surface; and output, based on the demodulated null burst signals, a radial position signal, indicative of a radial position of the selected head.
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公开(公告)号：US20240233761A9
公开(公告)日：2024-07-11
申请号：US18232113
申请日：2023-08-09
发明人： Satoshi Yamamoto
CPC分类号： G11B5/59666 , G11B5/56 , G11B5/59627
摘要： Various illustrative aspects are directed to a data storage device, comprising one or more disks; an actuator mechanism configured to position one or more heads proximate to a corresponding disk surface of the one or more disks; and one or more processing devices. The one or more processing devices comprise read/write circuitry which comprises an asynchronous demodulation module. The asynchronous demodulation module is configured to receive demodulated null burst signals based on the selected head reading servo burst fields of the corresponding disk surface; and output, based on the demodulated null burst signals, a radial position signal, indicative of a radial position of the selected head.
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公开(公告)号：US11783854B1
公开(公告)日：2023-10-10
申请号：US17804490
申请日：2022-05-27
发明人： Sukumar Rajauria , Robert Lee Smith
CPC分类号： G11B5/40 , G11B5/56 , G11B33/144
摘要： Various illustrative aspects are directed to a data storage device, comprising one or more disks; a head, configured to be positioned proximate to a disk surface among the one or more disks; a temperature sensor; and one or more processing devices. The one or more processing devices are configured to: detect, via the temperature sensor, a non-nominal heat dissipation of a portion of the head; and, in response to detecting the non-nominal heat dissipation of the portion of the head, mitigate the non-nominal heat dissipation of the portion of the head.
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公开(公告)号：US20190214042A1
公开(公告)日：2019-07-11
申请号：US16357181
申请日：2019-03-18
发明人： Kuen Chee Ee , Long Zhang , Peter Hahn , David Glaess
CPC分类号： G11B5/483 , G11B5/4873 , G11B5/5552 , G11B5/56
摘要： A multi-layer piezoelectric microactuator assembly has at least one poled and active piezoelectric layer and one poled but inactive piezoelectric layer. The poled but inactive layer acts as a constraining layer in resisting expansion or contract of the first piezoelectric layer thereby reducing or eliminating bending of the assembly as installed in an environment, thereby increasing the effective stroke length of the assembly. Poling only a single layer would induce stresses into the device; hence, polling both piezoelectric layers even though only one layer will be active in use reduces stresses in the device and therefore increases reliability.
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6.发明授权Skew-tolerant multiple-reader array in array-reader based magnetic recording 有权基于阵列读取器的磁记录中的容错多读取器阵列公开(公告)号：US09305593B2
公开(公告)日：2016-04-05
申请号：US14446012
申请日：2014-07-29
发明人： Eui Seok Hwang , George Mathew
CPC分类号： G11B20/10388 , G11B5/3958 , G11B5/3964 , G11B5/56 , G11B20/10037 , G11B20/10046
摘要： A method for enhancing read performance in an ARMR system includes: obtaining CTS information for a plurality of readers in a multi-reader head of the ARMR system, the CTS information defining a relationship between skew angle and CTS between respective combinations of subsets of the readers; determining, as a function of the CTS information, a subset of the readers which provides enhanced read performance among the readers for each of a plurality of skew angles; assigning a weight value to each of a plurality of read signals generated by a corresponding one of the readers for each of the skew angles, the weight value being indicative of a performance of the corresponding one of the readers relative to one another; and decoding information read from at least one target track of a magnetic storage medium being read as a function of the read signals and corresponding weight values.
摘要翻译： 一种用于增强ARMR系统中的读取性能的方法包括：在ARMR系统的多读取器头部中获得多个读取器的CTS信息，CTS信息定义倾斜角度与读取器子集的各组合之间的CTS之间的关系 ; 根据所述CTS信息确定所述读取器的子集，其为所述读取器中的多个倾斜角中的每一个提供增强的读取性能; 为每个所述倾斜角度的每个所述读取器生成的多个读取信号中的每一个分配权重值，所述权重值指示所述相应读取器之一相对于彼此的性能; 以及根据读取的信号和对应的权重值来读取从磁性存储介质的至少一个目标轨道读取的解码信息。
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公开(公告)号：US20160012841A1
公开(公告)日：2016-01-14
申请号：US14860522
申请日：2015-09-21
IPC分类号： G11B5/588
CPC分类号： G11B5/588 , G11B5/00813 , G11B5/00826 , G11B5/09 , G11B5/11 , G11B5/115 , G11B5/2652 , G11B5/29 , G11B5/4893 , G11B5/56 , G11B5/584
摘要： In one general embodiment, an apparatus includes at least two modules, each of the modules having an array of transducers, wherein the at least two modules are fixed relative to each other, wherein an axis of each array is defined between opposite ends thereof, wherein the axes of the arrays are oriented about parallel to each other, wherein the array of a first of the modules is offset from the array of a second of the modules in a first direction parallel to the axis of the array of the second module such that the transducers of the first module are about aligned with the transducers of the second module in an intended direction of tape travel thereacross; and a mechanism for orienting the modules about an axis orthogonal to the plane in which the arrays reside to control a transducer pitch presented to a tape.
摘要翻译： 在一个一般实施例中，装置包括至少两个模块，每个模块具有换能器阵列，其中至少两个模块相对于彼此固定，其中每个阵列的轴线限定在其相对端之间，其中 阵列的轴线彼此平行取向，其中第一模块的阵列在平行于第二模块的阵列的轴线的第一方向上偏离第二模块的阵列，使得 所述第一模块的换能器与所述第二模块的所述换能器沿所述磁带行进的预期方向大致对齐; 以及用于使模块围绕垂直于阵列所在的平面的轴定向以控制呈现给带的换能器间距的机构。
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公开(公告)号：US09129614B2
公开(公告)日：2015-09-08
申请号：US13875230
申请日：2013-05-01
发明人： Robert G. Biskeborn , Calvin S. Lo
CPC分类号： G11B5/00826 , G11B5/4893 , G11B5/56
摘要： An apparatus according to one embodiment includes a magnetic head, the magnetic head having: a tape bearing surface having a first edge oriented perpendicular to an intended direction of tape travel thereacross; and an array of transducers in and/or adjacent the tape bearing surface, wherein a longitudinal axis of the array is defined between opposite ends thereof, wherein the longitudinal axis of the array of transducers is oriented at an angle relative to the first edge, the angle being between greater than 0.2° and about 10°.
摘要翻译： 根据一个实施例的装置包括磁头，磁头具有：带状表面，具有垂直于磁带行进方向的第一边缘; 以及在带支承表面中和/或邻近带状表面的换能器阵列，其中阵列的纵向轴线限定在其相对端之间，其中换能器阵列的纵向轴线相对于第一边缘以一定角度定向， 角度大于0.2°至大约10°。
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公开(公告)号：US09117471B1
公开(公告)日：2015-08-25
申请号：US14577400
申请日：2014-12-19
发明人： Xiong Liu , Mingzhong Ding , KianKeong Ooi , Hoang Dung Vu , Chan Fan Lau , Xiang Lu
CPC分类号： G11B5/56 , G11B5/59627
摘要： An apparatus includes a controller configured to be coupled to a read/write head. The controller is configured to perform various operations including detecting a change in a time interval difference between servo sectors of a servo marked recording medium, converting the change to an offset signal that compensates for the change, and positioning the read/write head relative to the servo mark recording medium in response to the offset signal. The change in the time interval difference is representative of disk slip.
摘要翻译： 一种装置包括被配置为耦合到读/写头的控制器。 控制器被配置为执行各种操作，包括检测伺服标记的记录介质的伺服扇区之间的时间间隔差的变化，将改变转换为补偿变化的偏移信号，以及将读/写头相对于 响应于偏移信号的伺服标记记录介质。 时间间隔差异的变化代表了磁盘滑移。
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10.发明授权Electronic system with media preparation mechanism and method of operation thereof 有权具有介质制备机构的电子系统及其操作方法公开(公告)号：US09093095B2
公开(公告)日：2015-07-28
申请号：US14137418
申请日：2013-12-20
发明人： Donald Brunnett , Kathy X. Tang , Jerry G. Le
CPC分类号： G11B5/56 , G11B5/6011 , G11B5/6029 , G11B5/607 , G11B5/6076 , G11B20/1217 , G11B2005/0021
摘要： An apparatus includes: a media; a head over the media; and control circuitry configured to cause the head to: write a first precondition track with a preconditioning pattern on the media, and write a data track on the media at a first inter-track spacing with the head positioned in a first direction from the first precondition track.
摘要翻译： 一种装置包括：媒体; 媒体头 以及控制电路，其被配置为使得所述头部：在所述介质上以预处理模式写入第一预处理轨迹，并且以所述头部位于与所述第一前提条件相对的第一方向上的第一间隔轨道间隔处在所述介质上写入数据轨道 跟踪。
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