The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2018
Filed:
Nov. 23, 2016
Seagate Technology Llc, Cupertino, CA (US);
Evgeny Kharisov, Chaska, MN (US);
Josiah Natan Wernow, St. Paul, MN (US);
Kenneth A. Haapala, Plymouth, MN (US);
John C. Morris, Eden Prairie, MN (US);
Raye A. Sosseh, Minneapolis, MN (US);
Seagate Technology LLC, Cupertino, CA (US);
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.