Tape transport control based on sensor fusion
Angeliki Pantazi, Giovanni Cherubini, et al.
IFAC 2014
The resolution limits of tape head lateral position estimates derived from timing-based servo (TBS) patterns preformatted on perpendicularly oriented barium ferrite tape media are investigated. A set of four new TBS patterns with azimuth angles ranging from 15° to 24° but having, otherwise, identical parameters are compared. Measurements of the standard deviation of the closed-loop position-error signal are compared with resolution estimates based on: 1) the noise floor of the power spectral density of the lateral tape motion measured from the servo pattern during open or closed-loop track-following and 2) an analytical lower bound on the mean-squared estimation error, which depends on the servo readback signal shape and the signal-to-noise ratio. All four servo patterns are shown to achieve nanoscale resolution under realistic operating conditions. The 24° pattern was found to provide the highest performance with a position estimation resolution better than 3.8 nm for a single channel, and better than 2.6 nm when the estimates of two channels are combined.
Angeliki Pantazi, Giovanni Cherubini, et al.
IFAC 2014
Giovanni Cherubini
ISIT 1991
Giovanni Cherubini, Simeon Furrer, et al.
IEEE/ASME TMECH
Vinodh Venkatesan, Taras Lehinevych, et al.
BigData Congress 2018