Intelligent control and simulation analysis for vibration reduction of nonlinear structure

The response of structure deforms into their inelastic range during intense ground shaking and exhibits nonlinear behavior, and as a whole, there is no systematic and effective means for nonlinear structure control. In this paper, the active control is applied to the nonlinear structure through the adaptive fuzzy sliding mode control strategy to eliminate the damage of structure and then we introduce the design of a fuzzy controller, sliding mode controller and an adaptation law. What is more, the adaptive fuzzy system is used to mitigate the chattering phenomenon caused by sliding mode control. The simulation is made on a three-story steel frame model which referred to as the third generation Benchmark model. The control force is applied each floor through control devices that use the adaptive fuzzy sliding mode control algorithm. Then we calculated the response of the structure under earthquake and analysis the results. The results are satisfied in that they show adaptive fuzzy sliding mode control can utilize the advantage of the adaptive fuzzy control and the sliding mode control very well when applied to the nonlinear structure under the earthquake excitation.