Name
Title | ||
|---|---|---|
Servo-Pattern Design and Track-Following Control for Nanometer Head Positioning on Flexible Tape Media |
Abstract | ||
|---|---|---|
Achieving multi-Terabyte capacity in tape cartridges requires a substantially higher track density than that available in present systems, and hence a significantly higher positioning accuracy is required of the track-following servo in tape drives. In this paper, advanced concepts are considered for several elements of a tape system that enhance the track-following servo performance to reach nanometer positioning accuracy. We introduce a novel method for optimizing the geometry of servo patterns in a timing-based servo system. The design criterion aims to minimize the measurement error in the position-error signal (PES) yielded by a digital synchronous servo channel. A flangeless tape path is adopted to mitigate high-frequency components of the lateral tape motion. The track-following servo controller, which is designed based on the H∞ approach, takes into account the measured plant transfer function, the disturbance characteristics of the tape path, and the properties of servo channel. These elements are combined to investigate the track-following performance achievable with a new high-SNR magnetic tape based on perpendicularly-oriented BaFe particles. With this setup, a record closed-loop track-following performance of less than 14 nm PES standard deviation is demonstrated. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/TCST.2011.2177979 | Control Systems Technology, IEEE Transactions |
Keywords | Field | DocType |
H∞ control,closed loop systems,magnetic heads,position control,servomechanisms,tape recorders,transfer functions,H∞ control,SNR,digital synchronous servo channel,flangeless tape path,flexible tape media,magnetic tape,nanometer head positioning,nanometer positioning accuracy,plant transfer function,position-error signal,record closed-loop track-following performance,servo-pattern design,tape cartridge,tape drive,timing-based servo system,track-following servo control,track-following servo performance,H-infinity control,magnetic recording,magnetic tape,servo channel,servo pattern,track following | Tape drive,Servo,Magnetic tape,Control theory,Control engineering,Servomechanism,Jitter,Servo control,Mathematics,Servomotor,Servo drive | Journal |
Volume | Issue | ISSN |
20 | 2 | 1063-6536 |
Citations | PageRank | References |
3 | 0.80 | 0 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mark A. Lantz | 1 | 3 | 0.80 |
| giovanni cherubini | 2 | 6 | 4.29 |
| Angeliki Pantazi | 3 | 3 | 1.14 |
| Jens Jelitto | 4 | 3 | 0.80 |