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. 06, 2013
Filed:
Sep. 18, 2009
Hiroshi Uchida, Kanagawa, JP;
Tetsuo Ueda, Kanagawa, JP;
Chikako Sasaki, Kanagawa, JP;
Isao Yoneda, Kanagawa, JP;
Masahito Nitta, Kanagawa, JP;
Hiroshi Uchida, Kanagawa, JP;
Tetsuo Ueda, Kanagawa, JP;
Chikako Sasaki, Kanagawa, JP;
Isao Yoneda, Kanagawa, JP;
Masahito Nitta, Kanagawa, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A servo control system configured to position a head in accordance with position error signals between servo data on a disk read by the head in a servo sampling cycle and a target position. The system includes a plurality of adaptive peak filters connected in parallel configured to filter the position error signals and configured to change filter coefficients adaptively, and an estimator configured to estimate head vibration caused by disturbances using the servo data read by the head. The system further includes a selector configured to select a portion of the plurality of adaptive peak filters at preset occasions, and a setter configured to update coefficient settings of the portion of the adaptive peak filters selected by the selector in accordance with an estimation by the estimator.