Title :
Modeling and control of a dual-stage actuator for hard disk drive servo systems
Author :
Lee, Seung-Hi ; Kim, Young-Hoon ; Baek, Sang-Eun
Author_Institution :
Electro-mech. Lab., Samsung Adv. Inst. of Technol., Suwon, South Korea
Abstract :
This paper presents modeling and control of a dual-stage actuator for disk drive servo systems. Parametric modeling of MIMO and MISO dual-stage actuator is presented along with a method to find the parameters. Based on the model, a MISO dual-stage servo algorithm in the form of discrete-time LQG with feedforward control is proposed. Issues in the design of state space dual-stage actuator servo are also addressed. As an example, a MISO servo system is designed for a dual-stage actuator with a piezoelectrically driven microactuator. Through the results of simulation, it is shown that the proposed dual-stage actuator servo system yields considerably improved output disturbance rejection and very fast step response
Keywords :
MIMO systems; actuators; control system synthesis; disc drives; discrete time systems; feedforward; hard discs; linear quadratic Gaussian control; microactuators; multivariable control systems; parameter estimation; piezoelectric actuators; servomechanisms; state-space methods; MIMO dual-stage actuator; MISO dual-stage actuator; discrete-time LQG; dual-stage actuator control; dual-stage actuator modeling; feedforward control; hard disk drive servo systems; output disturbance rejection; piezoelectrically driven microactuator; servo algorithm; state space dual-stage actuator servo design; very fast step response; Actuators; Bandwidth; Control systems; Disk drives; Frequency; Hard disks; MIMO; Microactuators; Servomechanisms; State-space methods;
Conference_Titel :
American Control Conference, 2000. Proceedings of the 2000
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-5519-9
DOI :
10.1109/ACC.2000.877023
