Model updating for hybrid testing with unscented Kalman filter

作者：Wang Tao; Wu Bin^*

来源：Journal of Vibration and Shock, 2013, 32(5): 138-143.

• Hybrid simulation
• Hybrid testing
• Hysteretic behavior
• Hysteretic model
• Large-scale structure
• Model updating
• Strong earthquakes
• Unscented Kalman Filter

In a hybrid simulation, the whole system is divided into physical parts and numerical parts. For the hybrid simulation of large-scale structures subjected to strong earthquake, it is usually difficult to keep the numerical substructure within linear range. So the concern is raised how the modeling of the numerical part can be reliable. A model updating method for hybrid testing with unscented Kalman filter (UKF) was presented in order to improve the accuracy of model for numerical substructures. The new testing method assumes that the numerical substructures have the similar hysteretic behavior as the physical substructures, but the parameters of the hysteretic model are updated after they are identified with the unscented Kalman filter approach based on the data from experimental parts. The performance of UKF was investigated by numerical simulation of a single freedom nonlinear system. The effectiveness of the proposed test method was verified by an actual testing. The results show the method has good accuracy compared to conventional hybrid testing.

• 出版日期2013