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. 13, 2019
Filed:
Mar. 31, 2015
Seagate Technology Llc, Cupertino, CA (US);
Industry-academic Cooperation Foundation, Yonsei University, Seoul, KR;
Sung-Won Park, Yongin, KR;
Sung-Yong Lim, Seoul, KR;
Jae-Seong Lee, Seoul, KR;
Hyunseok Yang, Seoul, KR;
Seagate Technology LLC, Cupertino, CA (US);
Industry-Academic Cooperation Foundation, Yonsei University, Seoul, KR;
Abstract
Apparatus and method for disturbance rejection in a control system. In some embodiments, a controller is adapted to position a control object. A disturbance observer generates a disturbance compensation value which is applied to reduce position error resulting from application of mechanical disturbance to the control object. The disturbance observer includes an adaptive filter with at least one dead zone providing a pass-through response with a scalar gain of less than one.