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. 05, 2001
Filed:
Oct. 23, 1998
Robert O. Wyman, Longmont, CO (US);
Shiba P. Panda, Englewood, CO (US);
Storage Technology Corporation, Louisville, CO (US);
Abstract
A method and system for controlling position of a tape head relative to a tape includes sensing the servo track of a tape with servo read elements of the tape head. A position error signal is then generated for each servo read element. indicative of a position of the servo read element relative to the servo track. The position error signal from each servo read element is then determined to be either an unexpected or an expected position error signal. A position error signal is unexpected when at least one measured parameter based on a function of movement of the position of the servo read element relative to the servo track is greater than a predetermined threshold limit and is expected when the at least one measured parameter is lesser than the predetermined threshold limit. A position error signal for each unexpected position error signal is then predicted based on a function of the expected position error signals from the other servo read elements and historical behavior of the unexpected position error signal. A feedback signal is then compiled as a function of the expected position error signals and the predicted position error signals. The tape head is then positioned as a function of the feedback signal.