Adaptive substructure testing method with unscented Kalman filter

作者：Wang Tao^*; Zhang Jian; Wu Bin

来源：Journal of Vibration Engineering, 2013, 26(3): 328-334.

• Hysteretic model
• On-line identification
• Pseudo-dynamic testing
• Sub-structure testing
• Unscented Kalman Filter

An adaptive substructure testing method with unscented Kalman filter on the basis of traditional substructure pseudo-dynamic testing method is proposed in order to deal with the negative influence from the inaccuracy of the restore force model of numerical substructure. An online identification technique is adopted to estimate hysteretic model parameters of the testing substructure and modify the model parameters of the numerical substructures in the substructure testing. Fast and accurate hysteretic model identification is the key issue of adaptive substructure testing. In this paper, the parameters of hysteretic model of experimental substructure are taken as a part of the state vectors of experimental substructure and identified online with unscented Kalman filter. The performances of the proposed method are verified through numerical simulation. Results show that the new method has good accuracy and high computation efficiency, and test results are significantly improved over conventional substructure method with unchanged mathematical model of numerical substructure.

• 出版日期2013