Study On Active Mode Fuzzy Control Algorithm For Structural Vibration

As one of the major natural disasters,earthquake is characterized with suddenly occurring,short lasting time and destruction.It is still impossible to predict the occurring time of earthquake accurately based on current science and technology development.Therefore,structural seismic resistance and mitigation have become the research focus to ensure the safety of human life and property.The traditional seismic mitigation methods have limited effects and great risks,so the structural vibration control method can be widely used,the structural vibration control by installing control devices in some parts of the structure to get damping effect,especially the active control have the significant effect.When it's difficult to build structure model,using fuzzy control method can simplify computational model,improving the structure's stability and safety.In order to analyze the damping effect of modal fuzzy control algorithm of active control in structural vibration,a 20-layer steel frame model,with actuators in different floors,is built.Equation of structural motion should be established,the solution of the equation is written by Runge-Kutta method,fuzzy control rules are established according to the total energy minimum criterion.The effects of displacement and acceleration on the structure are considered.Six seismic waves are selected to calculate the effect of structural dynamic response.MATLAB software is used to calculate the data of displacement,velocity and acceleration.Origin software is used for graphic analysis and comparison.According to the data and graphics,the damping efficiency of active mode fuzzy control algorithm is analyzed.The damping efficiency is compared with AMD control algorithm and uncontrolled algorithm.The main conclusions are as follows,modal fuzzy control algorithm of active control has obvious damping effect on interlayer displacement,floor displacement and floor speed by adjusting U_A.With the U_A value increased,the damping efficiency also improves.The damping efficiency is evenly distributed along the height,but there is no obvious damping effect on the floor acceleration.Figure 32;Table 14;Reference 60...