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Instantaneous frequency tracking method for composite cable-stayed bridge
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DOI：10.1016/j.ymssp.2017.07.023.png)
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摘要
En 中文
This paper presents an instantaneous frequency (IF) tracking method based on conjugate pair decomposition, and describes a signal filtering methodology that is employed to eliminate unwanted frequencies. The proposed methodology is verified and compared with Hilbert-Huang transform method by numerical simulation, steel beams and composite cable-stayed bridge experiment. The results show the proposed method has good robustness, adaptability and anti-noise capability which can be used to accurately extract the instantaneous frequency in complex environments; in addition, the extracted frequencies are close to each other using conjugate-pair decomposition and Hilbert-Huang transform. Moreover, the proposed method may be further applied in structural damage identification. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword:
Instantaneous frequency
Signal filtering
Conjugate-pair decomposition
Composite cable-stayed bridge
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IF:
8.9
论文数:
1.3W
被引数:
6.6W
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