Title :
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
fDate :
9/1/1999 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
