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:
Aug. 30, 2005
Filed:
Feb. 16, 2001
Hai Thanh Ho, Westminster, CO (US);
Justin Won, Longmont, CO (US);
Fadi Youssef Abou-jaoude, Arvada, CO (US);
Gregory Andrew Campbell, Longmont, CO (US);
Hai Thanh Ho, Westminster, CO (US);
Justin Won, Longmont, CO (US);
Fadi Youssef Abou-Jaoude, Arvada, CO (US);
Gregory Andrew Campbell, Longmont, CO (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
An apparatus and method for compensating actuator arm oscillation induced by resonance mode excitation during a seek in a disc drive data handling system. The actuator arm supports a head adjacent a recording surface, and a servo loop controls the position of the actuator arm. A frequency of actuator arm oscillation is identified, after which a seek is initiated to move the head from an initial track to a destination track on the recording surface. A position error signal (PES) is generated to indicate position of the head relative to the destination track, and a compensation signal is generated by a filter based on the PES and the frequency of oscillation of the actuator arm. The compensation signal is adapted to remove a component of the PES arising from the actuator arm oscillation, and is applied to the servo loop as the head is settled onto the destination track.