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최도은,서준호,이효천,한상을 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2
The purpose of this study is to investigate the characteristics of chaotic behavior and the stabilization for the structure through controlling chaos in both passive and active aspects. The structure showing complex and irregular behavior could be clarified with none of the classical algorithm. Therefore, in this paper, we examined the dynamic phenomena through strange attractor, Lyapunov exponent and Poincare map based on chaos theory. The chaos control is investigated by using Pyragas methods originally introduced by Ott, Grebogi and Yang. It could be carried out through the way in which the present trajectory is measured, predicted on the movements of the trajectory and got feedback by the amount of those, so to be stabilized from the unstable chaotic orbits. The analytical model is composed of three truss elements, having two springs and dampers on their joint with one roller-supported end under the transversal step loads. Observing the behavior with changing its initial open angle, spring and damping coefficient respectively we found the range of each factor under which it avoids chaotic behavior that brought to carry the passive chaos control, which was followed the active control by mentioned Pyragas methods.