Output–Only Parametric Identification of a Scale Cable–Stayed Bridge Structure: a comparison of vector AR and stochastic subspace methods
نویسندگان
چکیده
A comparative assessment of two time–domain output–only vector structural identification methods, namely a Vector AutoRegressive (VAR) and a stochastic subspace method, is presented via their application to a laboratory cable–stayed bridge structure. A brief overview of the estimation methods is provided, while model order selection and validation are discussed. The modal frequencies and damping ratios are extracted and compared to those obtained via classical non–parametric techniques, while the methods’ performance characteristics are assessed. The results highlight each method’s facets and demonstrate how each one may be used for effective output–only identification.
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