Active suspension vibration control with dual stage actuators in hard disk drives

Author

Li, Ydeng ; Horowitz, Roberto

Author_Institution

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

Volume

4

fYear

2001

fDate

2001

Firstpage

2786

Abstract

Discusses the design of adaptive feedforward control for dual stage servo system in disk drives, which utilizes the vibration signal obtained from instrumented suspension, in order to compensate track mis-registration (TMR) due to air flow excited suspension vibration. Experiments are conducted on a spin stand to evaluate the TMR due to air flow excited suspension vibration using LDV. Adaptive feedforward control is designed to cancel suspension vibration, by using the strain signal on the surface of the instrumented suspension, and controlling slider with a MEMS microactuator (MA). An off-line MA model identification method, which does not utilizes relative position sensing is also proposed. Simulations show the proposed technique can successfully suppress the suspension vibration induced TMR

Keywords

adaptive control; control system synthesis; disc drives; feedback; feedforward; hard discs; identification; microactuators; position control; servomechanisms; vibration control; MEMS; active suspension vibration control; adaptive feedforward control; air flow excited suspension vibration; dual stage actuators; dual stage servo system; hard disk drives; instrumented suspension; microactuator; model identification; spin stand; strain signal; track mis-registration; Actuators; Adaptive control; Control systems; Disk drives; Instruments; Programmable control; Servomechanisms; Signal design; Strain control; Vibration control;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2001. Proceedings of the 2001

Conference_Location

Arlington, VA

ISSN

0743-1619

Print_ISBN

0-7803-6495-3

Type

conf

DOI

10.1109/ACC.2001.946310

Filename

946310