Short-span seeking control of hard disk drive based on integral type learning PTC

In a short-span seeking-mode of hard disk drives, the two-degree-of-freedom control is generally used. Authors' group proposed the perfect tracking control (PTC) method in order to achieve high accuracy and high speed controlling. We also proposed the learning PTC method which can suppress the overshoot by learning the tracking error in acceleration and deceleration period. In this paper, we propose the developed method named “Integral Type Learning PTC” which can suppress the overshoot higher by integral type learning of the trajectory tracking error.