압전션트회로를 이용한 광저장 디스크 드라이브의 진동저감

초록

This paper presents a piezoelectric shunt methodology to reduce unwanted vibration of optical drive (ODD). After briefly investigating a second-order mechanical vibration absorber model, the ODD structure is incorporated with the piezoelectric shunt circuit. In order to evaluate feasibility of multi-mode passive damping of the structure, admittance measurement of piezoceramic is undertaken. The parameters are optimally tuned by admittance measurement results on the basis of the circuit model and displacement transmissibility is evaluated. To verify validity of admittance measurement result, experiment is performed and vibration reduction is achieved at two different modes.