압전형 초소형 구동기를 이용한 하드 디스크 드라이브의 Dual-stage 구동기 제어기 설계

Design of Dual-Stage Actuator Controller for Hard Disk Drive using Piezoelectric Microactuator

This paper discusses a observer based discrete-time controller design and presents a modified control structure for dual-stage hard disk drive systems using piezoelectric microactuator(MA). In plant modeling, dynamic coupling between VCM and MA is not considered. Each controller is organized independently and designed using pole placement. Simulation result shows that 4th-order controller achieves about 3kHz servo bandwidth and 0.22msec of 2% settling time.