Head disk spacing variation suppression via active flying height control

Author

Liu, Xinqun ; Li, Amei ; Clegg, Warwick ; Jenkins, David ; Davey, Paul

Author_Institution

Centre for Res. in Inf. Storage Technol., Plymouth Univ., UK

Volume

2

fYear

2001

fDate

2001

Firstpage

888

Abstract

A novel active flying height control method is proposed for the suppression of head-disk spacing variation in hard disk drives under shock or vibration conditions. A thermal signal detection method is used for real-time derivation of spacing variation signal for feedback control. Design details of the servo control system are given. Simulation results are provided to demonstrate the effectiveness of the method

Keywords

adaptive signal detection; closed loop systems; disc drives; feedback; hard discs; high-pass filters; servomechanisms; spatial variables control; step response; tracking; vibration control; active flying height control; closed loop control system; feedback control; hard disk drives; head disk spacing variation suppression; high pass filter; inverse filter; real-time derivation; servo control system; shock conditions; spacing variation signal; step response; thermal signal detection method; tracking; vibration conditions; Disk recording; Electric shock; Feedback control; Giant magnetoresistance; Hard disks; Magnetic heads; Magnetic recording; Pensions; Signal detection; Vibration control;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE

Conference_Location

Budapest

ISSN

1091-5281

Print_ISBN

0-7803-6646-8

Type

conf

DOI

10.1109/IMTC.2001.928205

Filename

928205