- 이동통신 단말기 카메라의 손떨림 보정 장치의 H∞ 제어
- ㆍ 저자명
- 이치범,Lee. Chibum
- ㆍ 간행물명
- 한국생산제조시스템학회지
- ㆍ 권/호정보
- 2014년|23권 3호|pp.266-272 (7 pages)
- ㆍ 발행정보
- 한국생산제조시스템학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
This study proposes a closed-loop shaping control method with $H_{infty}$ optimization for optical image stabilization (OIS) in mobile phone cameras. The image stabilizer is composed of a horizontal stage constrained by ball bearings and actuated by the magnetic force from voice coil motors. The displacement of the stage is measured by Hall effect sensors. From the OIS frequency response experiment, the transfer function models of the stage and Hall effect sensor were identified. The weight functions were determined considering the tracking performance, noise attenuation, and stability with considerable margins. The $H_{infty}$ optimal controller was executed using closed-loop shaping and limiting the controller order, which should be less than 6 for real-time implementation. The control algorithm was verified experimentally and proved to operate as designed.