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In this paper, a nonlinear controller with dead-zone and saturation is proposed in order to improve the antishock performance. Since using dead-zone and saturation improves the stability margin, we can use a higher gain for the dead-zone than in the previous methods. In addition, we find that the overall controller with a linear lead-lag controller has an improved stability margin over controllers...
This paper presents a modified nonlinear controller design for optical disk drive systems to improve antishock performance. It was proposed in previous work that a nonlinear anti-shock controller is added parallel to the original linear servo control loop to improve its tracking performance in the presence of external shock. In the previous work, a dead-zone type nonlinear element is used for the...
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