Proceedings PaperEffects of the high gain servo controller and the initial value compensation on optical disk drives
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The high gain servo controller with complex zeros was proposed1. The controller can realize a much higher gain with the same servo bandwidth. We applied the controller to Blu-ray disc drives, and confirmed decrease of servo error and improvement of resistance to vibration. On the other hand, we observed the controller increased an overshoot of an initial response. We applied the initial value compensation2, and confirmed suppression of the overshoot.