Title :
Dual-stage servo controller for HDD using MEMS microactuator
Author :
Semba, Tetsuo ; Hirano, Toshiki ; Hong, John ; Fan, Long-Sheng
Author_Institution :
IBM Almaden Res. Center, San Jose, CA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
A MEMS microactuator provides a low-cost and high-performance solution to realize high track densities of HDD, because of the batch fabrication process and its clean mechanical characteristics. However, the servo system to control such a dual-stage system tends to be more complicated than a conventional HDD system. In this paper, a simple and efficient design method of a dual-stage servo controller for HDD applications is described. The experimental results of the track following control with the dual-stage actuator using a conventional VCM and a MEMS microactuator showed that the fourth-order servo controller can achieve a high bandwidth of more than 2 kHz
Keywords :
disc drives; hard discs; microactuators; servomotors; 2 kHz; HDD; MEMS microactuator; VCM; batch fabrication process; clean mechanical characteristics; design method; dual-stage actuator; dual-stage servo controller; fourth-order servo controller; high bandwidth; high track densities; low-cost high-performance solution; servo system; track following control; Actuators; Bandwidth; Control systems; Costs; Design methodology; Microactuators; Micromechanical devices; Resonant frequency; Servomechanisms; Transfer functions;
Journal_Title :
Magnetics, IEEE Transactions on
