Dual-stage actuator disk drives for improved servo performance: Track follow, track seek, and settle

This paper considers dual-stage actuator control system design and demonstr ates resulting servo performance improvements. A discrete-time dual-stage a ctuator control system is proposed along with a design technique to attain a very small destructive interference with satisfactory time and frequency responses, which is used for track follow, track seek in the microactuator range, and settle. Application results are provided to demonstrate usefulne ss of the proposed dual-stage actuator control system and the design techni que.