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:
Jun. 03, 2003
Filed:
Dec. 21, 2001
Jason D. Gregg, Oklahoma City, OK (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
An apparatus and method optimizing a model reference generator of a servo circuit to substantially mimic actual read/write head positions are disclosed. The servo circuit includes a microprocessor with associated random access memory storing a current profile and a set of optimized filter coefficients. The coefficients optimize a delay length of a finite impulse response filter, which delays passage of the current profile to a double integrator embedded in the microprocessor. The double integrator generates the substantially mimicked head positions. The filter coefficients are optimized by first, generating a model reference trajectory vector with a length determined by a set of empirically determined filter coefficients, then seek in an open loop mode while applying the selected current profile to the servo circuit to determine an actual trajectory vector, and replacing the empirically determined filter coefficient with an optimized filter coefficient determined from a mathematical comparison of the vector trajectories.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile