홀로그래픽 저장장치의 각다중화를 위한 갈바노미터의 동특성 해석 및 정밀 추종 제어

Dynamic Characteristic Analysis of Galvano Meter Scanner for Angle Multiplexing of Holographic Data Storage

This paper proposes a control system for a Galvano meter which can be used in angle multiplexing for a holographic data storage. Due to the small angle multiplexing selectivity and the exposure/delay time of a CCD camera, the system needs to be controlled to satisfy the performance specification. First, the mathematical model is derived by combining the electrical and mechanical dynamic equations. Then, the obtained model was tuned by the experiments. Finally, a PID controller using DSP was designed and was applied the holographic system. From this approach, we successfully meet the performance specification.