公开(公告)号：US09911442B1

公开(公告)日：2018-03-06

申请号：US15360540

申请日：2016-11-23

Applicant: Seagate Technology LLC

Inventor： Evgeny Kharisov ,  Josiah Natan Wernow ,  Kenneth A. Haapala ,  John C. Morris ,  Raye A. Sosseh

IPC: G11B5/55

CPC classification number: G11B5/5578 ,  G11B5/5547 ,  G11B5/5552 ,  G11B5/5565 ,  G11B5/5582

Abstract: An apparatus includes a first controller, a second controller, and a coupling compensator. The first controller is configured to generate a first voice coil motor (VCM) control signal in response to a first position error signal. The second controller is configured to generate a second VCM control signal in response to a second position error signal. The coupling compensator is configured to generate a first feedforward correction signal in response to the first VCM control signal. The first feedforward correction signal modifies the second VCM control signal to generate a modified second VCM control signal.