Research on Identification of Narrow Bandwidth

Qian Qiao; Wei Tang; Bin Bao; You Xin Cheng

doi:10.4028/www.scientific.net/AMR.542-543.1238

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 542-543Research on Identification of Narrow Bandwidth

Research on Identification of Narrow Bandwidth

Abstract:

This paper addresses numerical problem when using poly-reference least square complex frequency-domain identification (p-LSCF) in narrow bandwidth. To solve this problem, a transformation using frequency scaling and shifting is proposed, which enable us to have a well conditioned p-LSCF algorithm. Finally, the cantilever test measurements are used to validate the conclusions of the paper. The results show that the enhanced p-LSCF algorithm with great numerical stability, clearer stabilization diagram and better modal identification.

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Periodical:

Advanced Materials Research (Volumes 542-543)

Pages:

1238-1241

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.542-543.1238

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Online since:

June 2012

Authors:

Qian Qiao, Wei Tang, Bin Bao, You Xin Cheng

Keywords:

Modal Identification, Narrow Bandwidth, Numerical Stability, Stabilization Diagram

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