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. 06, 2007
Filed:
Jan. 10, 2006
Sang-eun Baek, Incheon-si, KR;
Sang-min Suh, Seoul, KR;
Jun-seok Shim, Seongnam-si, KR;
Chang-ik Kang, Jeju-si, KR;
Sang-eun Baek, Incheon-si, KR;
Sang-min Suh, Seoul, KR;
Jun-seok Shim, Seongnam-si, KR;
Chang-ik Kang, Jeju-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A servo control device for a disk drive capable of effectively compensating for a low frequency disturbance incoming to the disk drive is provided. The servo control device includes: a state variable estimator calculating a position estimation error based on a control input for controlling motion of a head and a position error signal by using a predetermined state equation; an estimation filter calculating a disturbance estimation value from the position estimation error by using a mathematical relation between a disturbance and the position estimation error; and a subtractor subtracting the disturbance estimation value from the control input.