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http://dx.doi.org/10.5050/KSNVN.2005.15.1.012

Dynamic Characteristic Analysis and Position Control for High Density Optical Head Using Bimorph PZT  

Park, Tae-Wook (연세대학교 정보저장기기 연구센터)
Park, No-Cheol (연세대학교 정보저장기기 연구센터)
Yang, Hyun-Seok (연세대학교 정보저장기기 연구센터)
Park, Young-Pil (연세대학교 정보저장기기 연구센터)
Kwon, Young-Ki (삼성전자 디지털프린팅 사업부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.15, no.1, 2005 , pp. 12-19 More about this Journal
Abstract
This paper proposed a dual actuator using Bimorph PZT for information storage device based on prove array NSOM(near-field scanning optical microscopy). The gap between the media and the optical head should be maintained within the optical tolerance. Therefore, a new actuator having high sensitivity is required. Bimorph PZT, which has fast access time and high sensitivity characteristic, is suitable for this precise actuating system. This paper is focused on derivation of mathematical model of dual Bimorph PZT actuator and control algorithm. Hamilton's principle was used for mathematical model. The model is verified by FEA(finite element analysis), and compared with experimental results. Different control algorithms were used for two Bimorph PZT actuating same direction and opposite direction. The gap between recording media and optical head was controlled within 20nm in experiment.
Keywords
Dual Actuator; Bimorph PZT; NSOM(Near-field Scanning Optical Microscopy); Gap Contro;
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