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유연 매체에 적용 가능한 Bimorph PZT 구동기의 설계 및 제어
심현재 ( H. J. Shim ),황현우 ( H. W. Hwnag ),박노철 ( N. C. Park ),양현석 ( H. S. Yang ),박영필 ( Y. P. Park ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
Nowadays, various approaches are performed to increase the storage capacity of optical storage device. One of the promising candidates is using the high NA lens. By using high NA lens, the beam spot size can be reduced which will lead to increase the storage density. This paper proposes a double cantilever beam type bimorph PZT actuator for fine motion that can control the gap between the flexible media and optical pickup which uses high NA lens. Mathematical model is derived by using Hamilton``s principle and the model is verified by finite element analysis and experiment. Position controller is designed and its performance is evaluated by experiment.