High-Performance Error Prediction Robust Tracking Control System for High Speed Optical Disk Recording Equipment

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  • 高速光ディスク装置のための高性能エラー予測型ロバストトラッキング制御系
  • コウソク ヒカリ ディスク ソウチ ノ タメノ コウセイノウ エラー ヨソクガタ ロバスト トラッキング セイギョケイ

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Abstract

This paper proposes a high-performance robust tracking control system for high speed optical disk recording system. The proposed tracking control system consists of robust feedback control system and perfect tracking control system with prediction of tracking error. Improving a free parameter, the proposed robust feedback control system has a good performance for the sudden disturbance suppression. For suppressing the periodic-disturbance in condition of high disk rotation speed, the perfect tracking control system with prediction of tracking error is improved by using zero phase low-pass filter (ZPLPF), in comparison with the ZPET feedforward control system. The experimental results point out that the proposed tracking servo system has a precise tracking response against both the periodic disturbance and the sudden disturbance.

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