Abstract：Based on the basic idea of Natural Excitation Technique (NExT) and Eigen Value Realization Algorithm (ERA), the solution process are formulated for NExT/ERA conducting multiple reference channels; and the strategies for determining the reference channels are suggested and investigated in the mean time. First, two evaluation criteria concerning modal frequencies and mode shapes are proposed to evaluate the identification results; then according to the criteria, the strategies for multiple references selection are proposed and discussed herein. The strategy can be used to exclude the bad references, which is more important for complex structures for which more sensors could be on the nodes of the natural modes so that more sensors are excluded and only a few sensors may survive. By applying the method to the Bill Emerson Bridge who is well known as it has been used worldwide as the ASCE benchmark model for the structural control problem of cable-stayed bridges, the work in this paper is proved to be meaningful. The work can also provide helpful reference for the system identification of general cable-stayed bridges.
张宇鑫;Sim S H;Spencer B F. 桥梁结构系统识别时的参考通道选择问题[J]. , 2011, 30(12): 181-184.
Zhang Yu-xin;Sim S H;Spencer B F. Reference channel selection strategy in system identification of brdige structure. , 2011, 30(12): 181-184.
2011, Vol. 30 
