New variable structure control of dual-stage actuator servo systems

Author

Jianying, Zhou ; RuJing, Zhou ; Youyi, Wang

Author_Institution

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

Volume

2

fYear

1999

fDate

1999

Firstpage

996

Abstract

A dual-stage actuator servo system is a promising solution for very high-density disk drives of the future. The requirements for its transient response and robustness are much tighter than for a single-stage one. In this paper, a new variable structure controller with an optimal and dynamic sliding surface is developed to realize satisfactory track seeking and following. Moreover, the servo system with the controller can adopt parametric uncertainties and time variations, and has strong rejection to external disturbances. Simulation results for the closed-loop system are presented in the paper

Keywords

closed loop systems; disc drives; electric actuators; machine control; robust control; servomotors; transient response; variable structure systems; closed-loop system; controller; dual-stage actuator servo systems; dynamic sliding surface; external disturbances rejection; optimal sliding surface; parametric uncertainties; robust control; robustness; satisfactory track following; satisfactory track seeking; time variations; transient response; variable structure control; very high-density disk drives; voice coil motor actuators; Bandwidth; Control systems; Electric variables control; Electrostatic actuators; Hard disks; Microactuators; Piezoelectric actuators; Robust control; Servomechanisms; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 1999. IECON '99 Proceedings. The 25th Annual Conference of the IEEE

Conference_Location

San Jose, CA

Print_ISBN

0-7803-5735-3

Type

conf

DOI

10.1109/IECON.1999.816548

Filename

816548