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. 10, 2017
Filed:
Aug. 17, 2015
The Regents of the University of California, Oakland, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Minghui Zheng, Albany, CA (US);
Masayoshi Tomizuka, Berkeley, CA (US);
Xu Chen, Willimantic, CT (US);
Wei Xi, Mission Viejo, CA (US);
Guoxiao Guo, Irvine, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A data storage device includes a disk, a head, a microactuator, a coarse actuator, and a servo controller. The microactuator is configured to position the head relative to the disk. The coarse actuator is configured to position the microactuator relative to the disk. The servo controller is configured to generate an adjusted position error signal based on a position error signal and an estimated microactuator position signal. The servo controller is also configured to filter the adjusted position error signal with a shaping filter to generate a filtered position error signal, and to provide sliding mode control of the coarse actuator based at least partially on the filtered position error signal.