公开(公告)号：US20180061452A1

公开(公告)日：2018-03-01

申请号：US15247382

申请日：2016-08-25

Applicant: Seagate Technology LLC

Inventor： Qiang Bi ,  GuoQing Zhang ,  Kian Keong Ooi ,  MingZhong Ding ,  WenJun Cao

IPC: G11B20/14

CPC classification number: G11B5/596

Abstract: An apparatus includes a disk locked clock system and a feedforward microactuator compensator. The disk locked clock system is configured to estimate a timing error and generate a timing error signal. The feedforward microactuator compensator is configured to generate a microactuator compensation signal, without use of a vibration sensor signal, in response to the timing error signal.

公开(公告)号：US09858955B1

公开(公告)日：2018-01-02

申请号：US15231513

申请日：2016-08-08

Applicant: Seagate Technology LLC

Inventor： WenJun Cao ,  GuoQing Zhang ,  Xiang Lu ,  Qiang Bi ,  MingZhong Ding ,  Lou Supino

IPC: G11B5/09 ,  G11B5/55

CPC classification number: G11B5/5565 ,  G11B5/5526 ,  G11B5/5552

Abstract: An apparatus includes a microactuator controller configured to generate a microactuator control signal, a feedforward microactuator compensator configured to generate a microactuator compensation signal, and a microactuator model filter configured to filter a modified microactuator control signal. The microactuator compensation signal is configured to be injected into the microactuator control signal to generate the modified microactuator control signal. The microactuator model filter generates a filtered modified microactuator control signal and injects the filtered modified microactuator control signal into a position error signal to generate a modified position error signal.

公开(公告)号：US10090009B2

公开(公告)日：2018-10-02

申请号：US15247382

申请日：2016-08-25

Applicant: Seagate Technology LLC

Inventor： Qiang Bi ,  GuoQing Zhang ,  Kian Keong Ooi ,  MingZhong Ding ,  WenJun Cao

IPC: G11B5/09 ,  G11B5/48

Abstract: An apparatus includes a disk locked clock system and a feedforward microactuator compensator. The disk locked clock system is configured to estimate a timing error and generate a timing error signal. The feedforward microactuator compensator is configured to generate a microactuator compensation signal, without use of a vibration sensor signal, in response to the timing error signal.

公开(公告)号：US10002630B1

公开(公告)日：2018-06-19

申请号：US15636438

申请日：2017-06-28

Applicant: Seagate Technology LLC

Inventor： Hoang Dung Vu ,  Xiang Lu ,  GuoQing Zhang ,  Chan Fan Lau

IPC: G11B21/02 ,  G11B5/596 ,  G11B5/55

CPC classification number: G11B5/59622 ,  G11B5/5582 ,  G11B5/59627

Abstract: An apparatus includes a frequency analyzer circuitry, filter circuitry, and voice coil motor (VCM) control circuitry. The frequency analyzer circuitry is configured to detect one or more dominant frequencies of a position error signal (PES). The filter circuitry is configured to identify one or more filters in response to detecting the one or more dominant frequencies, apply the one or more identified filters to at least one of a microactuator control signal and PES, and generate a VCM compensation signal in response to the filtered PES or the microactuator control signal. The VCM control circuitry is configured to generate a VCM control signal in response to the VCM compensation signal.

公开(公告)号：US09111560B1

公开(公告)日：2015-08-18

申请号：US14605076

申请日：2015-01-26

Applicant: Seagate Technology LLC

Inventor： GuoQing Zhang ,  Mingzhong Ding ,  KianKeong Ooi

IPC: G11B5/55

CPC classification number: G11B5/5565 ,  G11B5/5547 ,  G11B5/5582

Abstract: An apparatus comprises a controller configured to detect a seek failure of a read/write head. The controller is additionally configured to perform a seek recovery operation in accordance with a recovery sequence in response to the seek failure; the recovery sequence comprising a plurality of recovery procedures. Further, the controller is configured to determine if the seek recovery operation is successful and determine which of the recovery procedures provided the success. And, the controller is configured to dynamically calculate the success rate of each recovery procedure, modify the recovery sequence based on the success of the seek recovery operation and based on the success rate of recovery procedures providing the success.

Abstract translation: 一种装置包括被配置为检测读/写头的寻找故障的控制器。 所述控制器还被配置为响应于所述寻找故障，根据恢复顺序执行寻道恢复操作; 所述恢复序列包括多个恢复过程。 此外，控制器被配置为确定寻求恢复操作是否成功，并确定提供成功的恢复过程中的哪一个。 并且，控制器被配置为动态地计算每个恢复过程的成功率，基于寻求恢复操作的成功并基于提供成功的恢复过程的成功率来修改恢复序列。