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：US09621988B2

公开(公告)日：2017-04-11

申请号：US14109687

申请日：2013-12-17

Applicant: Seagate Technology LLC

Inventor： Lealon R. McKenzie ,  Evgeny Kharisov ,  Zai Yu Nang ,  Qiang Bi ,  Seow Zhao Li ,  Raye A. Sosseh

IPC: G11B5/55 ,  H04R3/00 ,  G11B5/596 ,  H04R15/00 ,  H04R29/00

CPC classification number: H04R3/002 ,  G11B5/5582 ,  G11B5/59694 ,  H04R15/00 ,  H04R29/001

Abstract: Certain exemplary aspects of the present disclosure are directed towards apparatuses and methods which mitigate the effect of speaker vibration on a disc drive. Audio associated with a speaker output is detected and triggers the generation of an output signal indicative of speaker vibration associated with such an audio output of a speaker. A magnetoresistive transducer of the disc drive is positioned relative to a storage medium based on the output signal, a target data storage location in the storage medium from which data is to be accessed via the positioning, and the position of the transducer. The output signal mitigates the effect of the speaker vibration on the transducer.

公开(公告)号：US09520149B1

公开(公告)日：2016-12-13

申请号：US15170859

申请日：2016-06-01

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Mingzhong Ding ,  Xiong Liu ,  Xiang Lu ,  Qiang Bi ,  Kian Keong Ooi

IPC: G11B5/596

CPC classification number: G11B5/59627 ,  G11B5/59694

Abstract: Systems and methods for compensating for magnetoresistive (MR) jog offset direct current (DC) drift in a disc drive are described. In one embodiment, a method may include determining an occurrence of NOS, for example, by monitoring disc slip, to determine when the method should proceed. An MR jog offset DC drift amount is determined for each head of the disc drive. One of several approaches may be employed for determining the MR jog offset DC drift amount. By determining an MR jog offset DC drift amount for each head, a compensation profile is determined for the drive. The determined compensation profile may then be used during operation of the disc drive to compensate for the DC drift. One of several approaches may be employed for compensating based on the compensation profile.

Abstract translation: 描述了用于补偿磁盘驱动器中的磁阻（MR）点动偏移直流（DC）漂移的系统和方法。 在一个实施例中，方法可以包括例如通过监视盘滑移来确定NOS的发生，以确定该方法何时进行。 确定磁盘驱动器的每个头部的MR点动偏移DC漂移量。 可以采用几种方法之一来确定MR点动偏移DC漂移量。 通过确定每个磁头的MR点动偏移DC漂移量，确定驱动器的补偿曲线。 然后可以在盘驱动器的操作期间使用所确定的补偿曲线以补偿DC漂移。 可以采用几种方法中的一种来基于补偿曲线进行补偿。