A modal analysis method for slider-air bearings in hard disk drives

Author

Zen, Qing-Hua ; Chen, Liang-Sheng ; Bogy, David B.

Author_Institution

Dept. of Mech. Eng., California Univ., Berkeley, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3124

Lastpage

3126

Abstract

A system identification method using modal analysis is proposed to analyze the dynamic characteristics of slider-air bearings in hard disk drives. A procedure for estimating the modal parameters, as well as the stiffness and damping matrices, is presented. The “Nutcracker” slider used as an example is analyzed, and the results are verified. The differences of the stiffness matrices calculated through different methods are found and explained. The results of the example show the assumptions of the method are satisfied in a wide amplitude range. Therefore the technique provides a powerful tool for head-medium interface analysis and experiment

Keywords

hard discs; identification; magnetic recording; Nutcracker; damping matrix; dynamic characteristics; hard disk drive; head-medium interface; modal analysis; slider-air bearing; stiffness matrix; system identification; Aerodynamics; Damping; Equations; Hard disks; Mechanical engineering; Modal analysis; Numerical simulation; Parameter estimation; Perturbation methods; System identification; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617865

Filename

617865