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High track density has been achieved by adopting an H, controller with a feed-forward compensator using adaptive filter theory in a sector servo system. In applying the H,,, control theory, a state-space model of an augmented plant was constructed considering the input location of the disturbance. M
This study aims to develop a sliding mode based learning controller for track-following in hard disk drives. The proposed controller incorporates characteristics of sliding mode control into learning control. The reason for using sliding mode control is attributed to its robust properties dealing wi
This paper considers the modeling and compensator design for Self-ServoWriting (SSW) process in disk drives. An Iterative Learning Control (ILC) based scheme is established to deal with radial error propagation and improve the quality of written tracks. In the proposed scheme, a feedback controller