公开(公告)号：US10068598B2

公开(公告)日：2018-09-04

申请号：US15915520

申请日：2018-03-08

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Reed D. Hanson ,  Kenneth A. Haapala ,  Dwight R. Kinney ,  Xinghui Huang

IPC: G11B5/55 ,  G11B5/48 ,  G11B5/596

CPC classification number: G11B5/556 ,  G11B5/4873 ,  G11B5/59622

Abstract: 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.

公开(公告)号：US09934802B2

公开(公告)日：2018-04-03

申请号：US15670942

申请日：2017-08-07

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Reed D. Hanson ,  Kenneth A. Haapala ,  Dwight R. Kinney ,  Xinghui Huang

IPC: G11B5/55 ,  G11B5/48 ,  G11B5/596

CPC classification number: G11B5/556 ,  G11B5/4873 ,  G11B5/59622

Abstract: 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.

公开(公告)号：US09728213B1

公开(公告)日：2017-08-08

申请号：US15170811

申请日：2016-06-01

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Reed D. Hanson ,  Kenneth A. Haapala ,  Dwight R. Kinney ,  Xinghui Huang

IPC: G11B5/55 ,  G11B5/48 ,  G11B5/596

CPC classification number: G11B5/556 ,  G11B5/4873 ,  G11B5/59622

Abstract: 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.

公开(公告)号：US09460742B1

公开(公告)日：2016-10-04

申请号：US14710829

申请日：2015-05-13

Applicant: Seagate Technology LLC

Inventor： XiMin Shan ,  Xinghui Huang

IPC: G11B21/02 ,  G11B5/596

CPC classification number: G11B5/59694 ,  G11B5/5582

Abstract: A discrete Fourier transform (DFT) of a position error signal (PES) of a read/write head controlled by a currently-used controller is determined. A plurality of predicted PES spectra are determined based on the DFT of the PES and a plurality of sensitivity functions associated with a plurality of controllers. One of the plurality of controllers is selected based on respective deviation metrics of the plurality of PES spectra. Servo control of the read/write head changes to use the selected controller.

Abstract translation: 确定由当前使用的控制器控制的读/写头的位置误差信号（PES）的离散傅里叶变换（DFT）。 基于PES的DFT和与多个控制器相关联的多个灵敏度函数来确定多个预测的PES频谱。 基于多个PES光谱的相应偏差度量来选择多个控制器中的一个。 读/写头的伺服控制更改为使用所选的控制器。