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Mitigation of track following repeatable runout in high TPI hard disk drives through servo and mechanical designs
Conference paper   Peer reviewed

Mitigation of track following repeatable runout in high TPI hard disk drives through servo and mechanical designs

Jen-Yuan Chang
IEEE Transactions on Magnetics, Vol.45(11), pp.5010-5015
11/2009
DOI: https://doi.org/10.1109/TMAG.2009.2029426

Abstract

Disk Disk clamp Feed-forward Harmonics Repeatable runout (RRO) Spindle motor TMR Electronic Optical and Magnetic Materials Electrical and Electronic Engineering
Servo and mechanical approaches are presented in this paper with a view to minimize repeatable runout (RRO) components of track-following position error signal (PES) in high Track Per Inch (TPI) hard disk drives. Harmonics of the RRO are identified and classified in the context of real-time RRO and written-in RRO harmonics. Combination of experimental PES measurements, relative analytical models, and practical servo and mechanical design methods is presented and systematically discussed in this paper. © 2009 IEEE.

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