Vibration Control Of Based-islolated Benchmark Structure With Improved Fuzzy Control Algorithm

The traditional seismic research method is based on the actual problem to establish accurate mathematical model for research.With the development of the society,the control object of no nlinearity,hysteresis and coupling is greatly increased.According to the proportional integral control and fuzzy control method,the proportional-integral fuzzy control algorithm is put forward in this paper to adjust the control of piezoelectric frictio n damper,and applied to the Benchmark base isolation structure.The main research contents are as follows:(1)Combined with proportional-integral control and fuzzy control method,the proportional-integral fuzzy control algorithm is put forward to adjust the control of piezoelectric friction damper,and applied to the Benchmark base isolation structure to analyze of the structure under earthquake excitation seismic performance.(2)The proportional-integral fuzzy control algorithm is put forward by the co ntrols section in different control stages.When the deviation is greater than a certain threshold,proportional-integral control is used to improve the response speed of the Benchmark base-isolated structure and speed up the response process;When the deviation is less than the certain threshold,fuzzy control is used to improve the damping performance of the Benchmark base-isolated structure and reduce the overshoot in the process of response.(3)Different seismic wave are input to the Benchmark isolatio n structure.In passive control,fuzzy control and proportional-integral fuzzy control,we can compare and analyze the Benchmark base-isolated structure response under different working conditions.The results show that compared with the general fuzzy cont rol and the proportional-integral fuzzy control method can not only reduce the displacement of isolation layer and the response of the upper structure,but have very good adaptability in different types of earthquake excitation.