Abstract
This paper proposes a high-performance robust tracking control system for next-generation optical disc system. The proposed tracking control system consists of robust feedback control system and perfect tracking control system based on error-prediction. The proposed robust feedback control system has a good performance of sudden disturbance suppression for improving a free parameter. Moreover, the periodic-disturbance suppression performance of error-prediction feedforward control system is improved by using zero phase low-pass filter (ZPLPF), in comparison with the conventional control approaches. The experimental results point out that the proposed tracking control system has a precise tracking response against both the periodic disturbance and the sudden disturbance.
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