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김상봉(Sang Bong KIM),안휘웅(Hui Ung AN),지석근(Suk Kun JEE) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.2 No.-
In this paper, a new design method in which transient response behavior of a servo-system can be improved, is proposed using a bilinear transformation method which assigns the poles of the closed-loop system in a specified region. The servo-system is a dynamic system which follows the given reference input automatically. In the above meaning, the design of a servo-system is similar to a regulator design problem for the extended system which is resulted from the given system and the reference input by the well known internal moel principle. In the design problem of servo control system, it is supposed that the proposed design method has more practical meaning in comparison to the other design methods, in the views of assigning the characteristic roots of the closed loop system in a specified region satisfying a design specification for the given transient response rather than in the exact positions of the poles. The applicability of the design method proposed in this paper was proved by the simulation results for the angle control problem of an electrical servo mechanism.
2자유도 서보제어기를 이용한 크레인의 Anti-Sway 제어
이진우(Jin Woo Lee),여태경(Tae Kyung Yeu),안휘웅(Hui Ung An),김상봉(Sang Bong Kim) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.4
In designing the anti-sway controller for crane system in the industrial field, one of the basic problem is to keep the stability of system, even if the mathematical model of the plant is not exact and disturbance exists. From this point of view, a two-degree-of-freedom(2DOF) servo controller has influnce on the system in which the integral compensation is effective only when a modeling error and/or a disturbance input exist. In this paper, the change of load weight and the variation of wire rope length considered as the structured uncertainty, and we design the 2DOF servo controller using independently the informations of reference signal and control output with both feedforward and feedback. The effectiveness is proved through the results for the anti-sway system in the system with the position control of trolley.