Abstract
A servo design method is presented for high track-density computer disk drives, in which the plant time delay, mainly due to the processor computation time, is taken into account. The key idea is to incorporate the delay model into the output equation of the state-space representation of the plant model. The application results confirm that the proposed method is very effective in enabling a higher servo bandwidth and, thereby, in realizing nano-level control accuracy required in high track-density computer disk drives.
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