http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
변정환(J. H. Byun),장지성(J. S. Jang),김영복(Y. B. Kim) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In order to handle water level in a tide tank, a weir system consists of two screw jacks and a weir of long and heavy rectangular type. And the weir is carried by left and right screw jack which are mounted on each side of weir itself. In this case, the weir should be constantly in the equilibrium state to get good performance of water level regulation. In this study, a control algorithm are developed to take accurate and quick equilibrium of the weir system The control algorithm is based on master-slave method to demand two minor control system One control system of I-PD controller is designed such that the left screw jack follow the reference signal without overshoot and control input saturation. The other controller of two-degree-of -freedom is designed to remove the position error occurred between left and right jack. The simulation results show that the desirable control performance is achieved.
변정환(J. H. Byun),여동준(D. J. Yeo),양주호(J. H. Yang) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
A motor cylinder apparatus is widely used to transfer a load in industrial applications. The apparatus is composed of a motor and power transmission elements such as worm gear and screw. In this case, the nonlinear friction in the machine elements, which is increased in the low speed range, has a bad influence on the control performance. And the variation of a load can be act as a disturbance with the nonlinear friction. Then, both nonlinear friction and variation load cause the steady state error in a motor cylinder apparatus driven at a low speed. To overcome this problem, the control scheme of a motor cylinder apparatus is proposed in this study. This control scheme consists of a feedback controller in the outer-loop to achieve nominal control performance and a disturbance observer in the inner-loop to compensate internal and external disturbance. Especially the filter of a disturbance observer is designed from viewpoint of robust stability. Finally, the simulation result shows that the proposed control system is effective for the disturbance elimination and stability to the model uncertainty.
횡동요 억제용 곡선레일의 수평유지제어시스템 구축에 관한 연구
변정환(J. H. Byun),여동준(D. J. Yeo) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
A delivery ship is used to handle the cargo with the crane to/from the ships. The ship is inclined in the direction of a cargo which is hung on a crane. In this case, a arc shaped rail should be in the equilibrium state to get good anti-rolling performance. In this study, a device and control algorithm are developed to take accurate and quick equilibrium of the rail. The device is composed of a hinged immovable support and two screw jacks. And the control algorithm demands two controllers. One controller is designed such that the screw jack 1 and 2 follow the position reference signal generated by a tilt sensor. The other controller of is designed to remove the synchronous error occurred between jack 1 and jack 2. The simulation results show that the desirable control performance is achieved.