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Synchrosqueezed wavelet transform for frequency and damping identification from noisy signals
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  • Synchrosqueezed wavelet transform for frequency and damping identification from noisy signals
  • Synchrosqueezed wavelet transform for frequency and damping identification from noisy signals
저자명
Montejo. Luis A.,Vidot-Vega. Aidcer L.
간행물명
Smart structures and systems
권/호정보
2012년|9권 5호|pp.441-459 (19 pages)
발행정보
테크노프레스
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Identification of vibration parameters from the analysis of the dynamic response of a structure plays a key role in current health monitoring systems. This study evaluates the capabilities of the recently developed Synchrosqueezed Wavelet Transform (SWT) to extract instant frequencies and damping values from the simulated noise-contaminated response of a structure. Two approaches to estimate the modal damping ratio from the results of the SWT are presented. The results obtained are compared to other signal processing methods based on Continuous Wavelet (CWT) and Hilbert-Huang (HHT) transforms. It was found that the time-frequency representation obtained via SWT is sharped than the obtained using just the CWT and it allows a more robust extraction of the individual modal responses than using the HHT. However, the identification of damping ratios is more stable when the CWT coefficients are employed.