NDLI: Initial resolution of head position and skew uncertainty in control systems for flangeless tape drives

Content Provider	IEEE Xplore Digital Library
Author	Cherubini, G. Jelitto, J. Pantazi, A.
Copyright Year	2012
Description	Author affiliation: IBM Research - Zurich, 8803 Rüschlikon, Switzerland (Cherubini, G.; Jelitto, J.; Pantazi, A.)
Abstract	Tape drive operation with flangeless rollers in the tape path has been introduced in tape drives to extend the lifetime of drive and medium and to achieve nanometer positioning accuracy in track following by mitigating high-frequency lateral tape motion. However, the use of flangeless rollers requires dynamic-skew compensation to keep the head perpendicular to the direction of tape motion in the presence of large lateral tape excursions. Furthermore, a large uncertainty on the initial values of the tape-to-head skew and of the head lateral position must be resolved prior to track following for write/read operation. In this paper, we consider a control system for a two-degree-of-freedom head actuator using a dual synchronous servo channel to provide lateral position and tape-to-head skew feedback. The initial uncertainty on the tape-to-head skew and on the data band being spanned by the head at the beginning of drive operation is resolved by testing hypotheses related to different tape-to-head skew angles with an ad hoc metric obtained by the dual servo channel. Simulation results are presented to illustrate the performance of the proposed method.
Starting Page	5052
Ending Page	5058
File Size	835555
Page Count	7
File Format	PDF
ISBN	9781467320658
ISSN	07431546
e-ISBN	9781467320665
e-ISBN	9781467320641
DOI	10.1109/CDC.2012.6426446
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Servomotors Actuators Channel estimation Uncertainty Tracking Magnetic heads
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Modeling and Simulation

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