Structural System Identification Based on Differential Evolution Algorithm

A method for identification of structural systems using Differential Evolution Algorithm(DE) is presented.The basic idea of the method is that the identification problems are cast as a multimodal nonlinear programming problem,and then Differential Evolution Algorithm is used to find the optimal estimation of the parameters.Some results obtained with this algorithm are presented for the identification of structural systems under conditions including limited input/output data,noise polluted signals,and no prior knowledge of mass,damping,or stiffness of the system.The numerical examples show that the DE method is easy to implement,computationally inexpensive,and is successful for structural system identification.