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:
Apr. 28, 2009
Filed:
Mar. 20, 2006
Jeffrey V. Derosa, Shrewsbury, MA (US);
Jeffrey V. DeRosa, Shrewsbury, MA (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
Methods of controlling a transducer that is adjacent to a rotatable data storage disk in a disk drive are disclosed, the disk drive having an actuator configured to position the transducer, a rotational acceleration sensor configured to generate a rotational acceleration signal, a position error sensor configured to generate a position error signal, and a controller configured to control the actuator to move the transducer to a target track during a seek operation. The methods include dynamically adjusting a gain factor in response to the position error signal and the acceleration signal during a settle period following the seek operation, multiplying the rotational acceleration signal by the gain factor to generate an adjusted rotational acceleration signal, and adding the adjusted acceleration signal to the position error signal to generate an adjusted position error signal, and moving the transducer in response to the adjusted position error signal.