A New Method for Modal Parameter Identification Based on Natural Excitation Technique and ARMA Model in Ambient Excitation

Can He; Jian Chun Xing; Xun Zhang

doi:10.4028/www.scientific.net/AMR.1065-1069.1016

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Structural Performance under Seismic over Predesigned Intensity
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A New Method for Modal Parameter Identification Based on Natural Excitation Technique and ARMA Model in Ambient Excitation
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Test Study on Seismic Performance of Cantilevered Vertical Irregular Model Frame Structure
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1065-1069A New Method for Modal Parameter Identification...

A New Method for Modal Parameter Identification Based on Natural Excitation Technique and ARMA Model in Ambient Excitation

Abstract:

Due to the interference of strong vibration signal, a big error exists in modal parameter identification based on traditional ARMA model. In order to solve this problem, a new method for modal parameter identification based on natural excitation technique (NExT) and ARMA model is presented. Firstly, NExT is used to obtain cross-correlation function of different response sequences. Then, ARMA model of cross-correlation function is established, and the parameters of ARMA model are estimated by least squares method. Finally, the modal parameter identification is achieved using the relationship between the ARMA parameters and structural modal parameters. Experiment shows that the identification results of our method are more accurate than the traditional ARMA model.

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Periodical:

Advanced Materials Research (Volumes 1065-1069)

Pages:

1016-1019

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.1016

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Online since:

December 2014

Authors:

Can He*, Jian Chun Xing, Xun Zhang

Keywords:

ARMA, Modal Parameter Identification, Natural Excitation Technique

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* - Corresponding Author

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