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:
Jan. 03, 2006
Filed:
May. 25, 2004
Toshio Inaji, Osaka, JP;
Keizo Miyata, Kyoto, JP;
Hiroshi Kohso, Osaka, JP;
Makoto Umeda, Osaka, JP;
Toshio Inaji, Osaka, JP;
Keizo Miyata, Kyoto, JP;
Hiroshi Kohso, Osaka, JP;
Makoto Umeda, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A disk apparatus includes: an actuator; a driver; a voltage detectorfor outputting first voltage signal Ed which is produced in a driving coilof the actuator; a voltage signal adjusterfor outputting pseudo disturbance signal ur and generating second voltage signal Edfrom pseudo disturbance signal ur, driving signal u, first voltage signal Ed, and disturbance estimation signal τd; a disturbance estimatorfor estimating the magnitude of disturbance load τd applied to a magnetic headfrom driving signal u and second voltage signal Edto output disturbance estimation signal τd; a position detectorfor generating position error signal e which corresponds to a current position of the magnetic head; a position controllerfor generating control signal c from position error signal e; and a correctorfor generating driving signal u from disturbance estimation signal τdand position control signal c.