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:
Nov. 22, 2022
Filed:
Jan. 20, 2022
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Takayuki Kawabe, Sagamihara Kanagawa, JP;
Takeyori Hara, Kawasaki Kanagawa, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo, JP;
Abstract
According to one embodiment, a magnetic disk device includes a disk, a head that writes data to the disk and reads data from the disk, an actuator that is rotationally driven and controls movement of the head mounted on the disk, and a controller that estimates a fundamental frequency of a position error signal generated in positioning control of the head, the fundamental frequency corresponding to a disturbance having harmonics, determines the fundamental frequency, determines the number of delay samples based on the fundamental frequency, and suppresses a multiplied frequency that is a harmonic of the fundamental frequency according to the number of the delay samples.