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- W2069796790 abstract "본 논문에서는 구조적으로 유연한 특성을 갖는 교량 구조물을 대상으로 외력에 의해 발생되는 진동을 실시간으로 제어하고자 준능동형 실시간 피드백 진동제어시스템을 구성하고, 이를 실험적으로 평가하였다. 여기서 진동제어를 위한 대상 교량 구조물은 서해대교를 약 1/200 크기로 규모화 하여 설계/제작한 모형 교량 구조물을 사용하였고, 실험실 여건을 고려해 규모화 된 El-centro 지진파형으로 구조물을 가진하였다. 또한, 교량 상판 중앙지점에는 전자석이 채용된 전단형 MR 댐퍼를 수직방향으로 설치하여 발생된 진동을 제어하도록 하였고, 동시에 변위계 및 가속도계를 설치하여 구조물의 응답(변위, 가속도)을 획득하였다. 이때 진동제어의 실험은 크게 비-제어, 수동 on/off 제어, Lyapunov 안정론 기반 제어 그리고, Clipped-optimal 제어조건으로 구분하여 실시간 피드백 진동제어실험을 수행하였고, 이때 진동제어의 효과는 상판 중앙지점에 대하여 각 실험방법 별 절대최대변위와 절대최대가속도 그리고, 인가전원의 소모량 등을 성능지수를 이용해 정량적으로 평가하였다. 진동제어실험의 결과로부터, Lyapunov 제어 및 Clipped-optimal 제어방법 모두 구조물의 발생 변위 및 가속도를 효과적으로 감소시켰으며, 특히 진동제어 시 요구되는 외부 인가전원의 소비를 크게 감소시킬 수 있음을 확인하였다. 최종적으로, 본 논문에서 구성한 준능동형 실시간 피드백 진동제어시스템은 교량 구조물에 발생된 진동을 제어 관리하기 위한 적극 효율적인 방법으로 활용될 가능성이 있음을 확인하였다. This paper is concerned to constitute a semi-active realtime feedback vibration control system and evaluate it through experiments in order to control in realtime the vibration externally generated, specially on the bridges which is structurally flexible. For the experiment of vibration control, we built a model bridge structure of Seohae Grand Bridge in a 1/200 reduced form and inflicted El-centro wave on the model structure also in a reduced force considering the lab condition. The externally excited vibration was to be controled by placing a shear type MR damper vertically on the center of bridge span, and the response (displacement and acceleration) of structure was to be acquired by placing LVDT and Accelerometer at the same time. As for the experiment concerning controlling vibration, a realtime feedback vibration control experiments were performed under each different condition largely such as un-control, passive on/off control, Lyapunov stability theory control, and Clipped-optimal control. Its control performance under different condition was quantitatively evaluated in terms of the peak absolute displacements, the peak absolute accelerations and the power required for control on the center of span. The results of experiments proved that the Lyapunov control and clipped-iptimal control were effective to decrease the displacement and acceleration of the structure, and also to decrease the power consumption to a great extent. Finally, the semi-active realtime feedback vibration control system constituted in this research was proven to be an effective way to control and manage the vibration generated on bridge structure." @default.
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- W2069796790 title "Performance Estimation of Semi-active Real-time Feedback Vibration Control System" @default.
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