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。