High Bandwidth Control Design and Implementation for a Dual-Stage Actuation System With a Microthermal Actuator

Author

Tingting Gao ; Chunling Du ; Cheng Peng Tan ; Zhimin He ; Jiaping Yang ; Lihua Xie

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore

Volume

49

Issue

3

fYear

2013

fDate

Mar-13

Firstpage

1082

Lastpage

1087

Abstract

This paper is devoted to the control design and implementation of the dual-stage actuation system with a newly developed microthermal actuator (MTA) as the secondary actuator. The characterization and modeling of this new MTA is presented for controller design. Its performances such as stroke, time constant, and a good linearity are exhibited. The controller design of the MTA-based dual-stage actuation system is then proposed, and aims to push the bandwidth with the MTA. The simulation and the experimental testing have demonstrated the achievable 6-kHz bandwidth with 60-kHz sampling rate, the MTA displacement of 15 nm at 4 kHz, and 0.1-ms seeking time for 40-nm seeking length.

Keywords

control system synthesis; microactuators; MTA displacement; MTA-based dual-stage actuation system; controller design; experimental testing; frequency 4 kHz; high bandwidth control design; microthermal actuator; secondary actuator; time constant; Bandwidth; Microactuators; Resonant frequency; Sensitivity; Servomotors; Suspensions; Dual-stage servo systems; hard disk drives (HDDs); microthermal actuator (MTA); servo control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2226187

Filename

6338337