Disk flutter and its impact on HDD servo performance

Author

Guo, Lin ; Chen, Yih-Jen Dennis

Author_Institution

Adv. Technol. Group, Maxtor Corp., Milpitas, CA, USA

Volume

37

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

866

Lastpage

870

Abstract

With rapid growth in storage density and spindle motor speed in hard disk drives (HDD\´s), disk flutter and its impact on drive performance is becoming a more and more important issue. In this study, vibrations of disks used in 3.5" hard disk drives with different thickness have been measured. A model has been developed to translate disk motion measured in vertical direction to actual head off-track motion. This model was constructed based on geometric modeling and FEM analysis of disk mode shapes. It was then validated by drive level position error signal (PES) measurements. Based on the model and flutter measurement, the TMR impact of the flutter after servo has been studied and the PES projection for drives with different spindle speeds have been carried out

Keywords

disc drives; finite element analysis; hard discs; servomechanisms; small electric machines; vibrations; 3.5 in; disk flutter; finite element analysis; geometric model; hard disk drive; position error signal; servo control system; spindle motor; track mis-registration; vibration mode shape; Drives; Hard disks; Motion measurement; Position measurement; Servomechanisms; Servomotors; Shape; Solid modeling; Thickness measurement; Vibration measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.917633

Filename

917633