Comparative Study On Tim Delay Compensation Methods In Real Time Hybrid Test For Wind Induced Vibration Control Of Tall Building With TLD System

As a new test method in civil engineering,real time hybrid test is composed of test substructure and numerical simulation substructure.This method can effectively evaluate the real-time response of complex structures under dynamic loads.However,the delay effect of the actuator and the test substructure itself will bring errors to the results of the real-time hybrid experiment,which poses a challenge to the real-time hybrid experiment delay compensation.In this dissertation,two time-delay compensation methods(Adaptive Forward Prediction--AFP compensation method and Adaptive Time Series--ATS compensation method)are studied in the real-time hybrid test of wind induced-vibration control of tall buildings with TLD system.The example model used in the test is the third-generation structural control Benchmark model,assuming that a TLD passive control system is installed atop to reduce its wind-induced dynamic response.Through numerical simulation and real-time hybrid test platform based on NI Compact RIO system,the control parameters of the two delay compensation algorithms are analyzed in detail,and the effects of the two delay compensation methods are compared and analyzed.The main research work of this paper is as follows:In this dissertation,the adaptive forward prediction compensation method(AFP)is firstly analyzed,a simulation module based on the algorithm is designed by MATLAB Simulink software,and the delay compensation effect under sinusoidal excitation with constant time delay is analyzed.Meanwhile,The time delay compensation module based on AFP algorithm for the wind-induced vibration control on the benchmark model with TLD system is established by Simulink Software.The delay compensation effect of this algorithm on the wind-induced vibration control on the benchmark model is analyzed.The different control parameters in AFP are considered.And the robustness of AFP time delay compensation algorithm is evaluated.The theory and implementation method for the adaptive time series compensation method(ATS)are then discussed.Based on this algorithm,time delay compensation module for the benchmark model is also developed to evaluate the wind-induced vibration control of the benchmark model with TLD system.The effect of delay compensation is analyzed.The selection principle for the ATS control parameters and the effects of variation in the value of the control parameters are investigated,and the robustness of ATS delay compensation algorithm is discussed.In order to study the effect of the time delay compensation algorithm in the real real-time hybrid test,the real-time hybrid test platform was developed with the small shaking table with electric motor actuator and NI Compact RIO embedded system.While the TLD system was selected as the test substructure,the benchmark model was adopted as the numerical substructure in the real-time hybrid test.The optimal values for the control parameters are studied by applying the two time delay compensation algorithms.The comparison between the tested and simulation results showed that the two time delay compensation algorithms had obvious effects on obtaining more accurate results of the real-time hybrid test for the wind-induced vibration control of the benchmark model with TLD system.By comparing and analyzing the effect of two time delay compensation methods,the rationality and validity of time delay compensation method in the real-time hybrid test with small shaking table with electric motor actuator is verified,and the error of real-time hybrid test caused by time delay is reduced.The time delay compensation algorithms ensure the accuracy and validity of the real-time hybrid test on the wind vibration control of tall buildings with TLD system.