Design and implementation of a hard disk drive servo system using robust and perfect tracking approach

This paper deals with the problem of a servo system design for a conventional hard disk drive with a single voice-coil-motor actuator using a so-called robust and perfect tracking (RPT) approach. We first model the physical system and then formulate it into a robust and perfect tracking problem, in which a measurement feedback controller can be obtained to achieve a robust and perfect tracking for any step reference, i.e., the L/sub p/-norm of the resulting tracking error with 1/spl les/p