Distortion effects on servo position error transfer function

Author

Ho, Hai T. ; Doan, Toan

Author_Institution

Huyndai Maxtor Corp., Longmont, CO, USA

Volume

33

Issue

4

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

2569

Lastpage

2572

Abstract

Two kinds of nonlinear distortion of hard-disk-drive position error signal (PES) transfer function are examined and modeled. The first distortion is the saturation of the PES due to narrow read width. The second distortion is the on-track dead band at the center of the transfer function due to wide erase band. Several formulas are developed to describe the relationships between the distortion effects and the design parameters: read width, track spacing, and erase width. These distortions are highly undesirable for the track following sectored servo system. However, they are predictable and avoidable if certain conditions are satisfied. The geometrical analysis of the distortion phenomenon is presented here

Keywords

errors; hard discs; magnetic heads; position control; servomechanisms; transfer functions; distortion effects; erase width; geometrical analysis; hard disk drive; nonlinear distortion; position error signal; read width; sectored servo system; servo position error transfer function; track spacing; Disk drives; Hard disks; Helium; Magnetic analysis; Magnetic heads; Magnetoresistance; Nonlinear distortion; Servomechanisms; Transfer functions; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.595916

Filename

595916