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윤신일(Shinil Yun),박근호(Keunhyo Park),한상보(sangbo Han) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Many types of smart materials and control laws are available to actively adjust the structure from various external disturbances. Usually, a certain type of control laws to activate a specific smart material is well established, but the effectiveness of the control scheme is limited by the choice of the smart materials and the responses of the structure. ER fluid is adequate to provide relatively large control force, on the other hand, the PZT patches are suitable to provide small but arbitrary control forces at any point along the structure. It was found that active vibration control mechanism using ER fluid failed to suppress the excitation off the resonant frequency with loop of the control system. To compensate this additional peak of the closed loop system, PPE control using PZT as an actuator is added to construct a hybrid controller.
이성기(Seongki Lee),윤신일(Shinil Yun),한상보(Sangbo Han) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Rigid plate elastically supported at the edges is modeled and the performance of the optimal vibration<br/> control under sinusoidal excitation is tested. The controller based on the linear quadratic regulator with output<br/> feedback is designed to control the multi-degree of freedom vibration. Relative weighting parameters are<br/> considered as design constraints to determine the limitation of maximum control force and state parameters.<br/> Control force calculated by proportional output feedback of the displacement and velocity is used to suppress<br/> the vibration induced by the sinusoidal external force. The active vibration control of vibrating plate by the<br/> LQR controller is examined through the numerical simulations that show the effectiveness of optimal control<br/> scheme on the three degrees of freedom structure.
전기유동유체와 압전세라믹을 이용한 복합지능구조물의 감쇠특성 연구
윤신일,박근효,한상보,최윤대 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
Many type of smart materials and control laws are available to actively adjust the structure from various external disturbances. Usually, a certain type of control law to activate a specific smart material is well established, but the effectiveness of the control scheme is limited by the choice of the smart materials and the responses of the structure. ER fluid is adequate to provide small but arbitrary control forces at any point along the structure. It was found that active vibration control of the structure embedded with ER fluids failde to suppress the vibration excited with broad band frequency due to the limited change of the structure characteristics. To compensate this limited effect of the control scheme with ER fluid alone, PPF control using PZT as an actuator is added to construct a hybrid controller.
한상보,이성기,윤신일 慶南大學校 附設 工業技術硏究所 2003 硏究論文集 Vol.21 No.2
Rigid plate elastically supported at the edges is modeled and the performance of the optimal vibration control under sinusoidal excitation is tested. The controller based on the linear quadratic regulator with output feedback is designed to control the multi-degree of freedom vibration Relative weighting parameters are considered as design constraints to determine the limitation of maximum control force and state parameters Control force calculated by proportional output feedback of the displacement and velocity is used to suppress the vibration induced by the sinusoidal external force. The active vibration control of vibrating plate by the LQR controller is examined through the numerical simulations that show the effectiveness of optimal control scheme on the three degrees of freedom structure.