Track Seeking Control of Hard Disk Drives Based on New Two-Degree-of-Freedom Control Scheme with Vibration Minimized Trajectories
Abstract
This paper proposes a new TDOF control scheme to minimize the tracking error caused by the neglected vibration modes of the plant. It is shown that the tracking error is an affine function of the design parameter under an simple approximation, and the parameter is optimized from a measured tracking error profile based on the least-square method. The case that the gain of the plant has a perturbation is also considered. The proposed method is applied to the track-seeking control of a hard disk drive, and it is shown that the track-seeking error can be reduced by the simulation using aprecise model of hard disk drives.
