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:
Oct. 10, 2006
Filed:
Jan. 13, 2004
Ichiro Watanabe, Kawasaki, JP;
Ichiro Watanabe, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A follow-up control system follows up a head of a storage device to a storage medium. A sine wave signal learning section () which learns sine wave signals according to follow-up error signals which are input to a feedback control system (), and performs time lead compensation corresponding to a delay of the feedback system (), is provided. Since the time lead compensation is used for the sine wave signal learning model which can learn at high-speed, frequency disturbance of high frequency, for which phase lag must be considered, can be a compensation target, and the present invention contributes to the improvement of follow-up accuracy of the storage device.