An analysis method for determining the head positioning error of hard disk drives-settling response analysis

Author

Numasato, Hidehiko ; Ito, Kiyotada ; Saegusa, Shozo

Author_Institution

Data Storage & Retrieval Syst. Div., Hitachi Ltd., Kanagawa, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2307

Lastpage

2309

Abstract

A settling response analysis method for hard disk drives has been developed. In this method, the settling response is decomposed into its contributing modes using the Prony method, which is one of the experimental modal analysis methods. These modes are divided into servo modes and mechanical vibration modes based on the damping ratio in order to recompose a servo response and a mechanical vibration response. The impact of mechanical vibrations on settling response is quantified by their 2-norm. Relating to the track misregistration (TMR) budget design, each mechanical vibration mode is evaluated according to its initial amplitude and its decay rate

Keywords

disc drives; hard discs; magnetic heads; modal analysis; transient response; vibrations; 2-norm; Prony method; analysis method; contributing modes; damping ratio; decay rate; experimental modal analysis methods; hard disk drives; head positioning error; initial amplitude; mechanical vibration modes; mechanical vibration response; servo modes; servo response; settling response analysis; track misregistration budget design; Damping; Frequency; Hard disks; Indium tin oxide; Memory; Modal analysis; Servomechanisms; Target tracking; Transient response; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800808

Filename

800808