Title :
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
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;
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
DOI :
10.1109/IECON.1999.816548
