ON THE OPTIMAL SELECTION OF MEASURED DATA IN TIME DOMAIN FOR STRUCTURAL IDENTIFICATION

摘要：

The results of structural identifications rely generally on the measured data in time domain.Reasonable results of structural identification can only be obtained based on the measured data with sufficient information.This paper aimed to deal with the optimal selection of measured data for structural identification.And the trace of Fisher information matrix (FIM) of measured data in time domain,might be used to select the most informative among the available measured data.In order to calculate FIM,the formulae of obtaining derivatives of calculated data with respect to identification parameters,were developed.With the studied case of one multi-degree-of-freedom spring-mass system,the identification results,based on different simulated measured data while on the other identical conditions for calculations,were compared.The results of comparison showed that,among them,the one corresponding to the most informative data selected by using the proposed method was the most reasonable,which demonstrated the validity of the method.

关键词： structural identification informativeness Fisher information matrix

作者: L.T.Zhang Z.X.Li Q.G Fei

作者单位: College of Civil Engineering,Southeast University,Nanjing 210096,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 1607-1611

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）