Multichannel Spectral Estimation: An Approach to Estimating/Analyzing Vibrational Systems
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Dynamic structures either operational or under test require complex spectral analysis in order to characterize their modal responses. In some applications constant vigilance in terms of analysis or potential failures demand an accurate methodology to estimate both modal frequencies as well as mode shapes. Multichannel versus single channel processing can create a dilemma especially when specific modes are not excited across all measurement channels or weakly excited implying multichannel techniques are required to extract them from noisy data. Here we investigate a suite of both classical and modern parametric spectral estimation techniques to extract modal frequencies based on synthesized multiple input/multiple output (MIMO) structural data.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1592017
- Report Number(s):
- LLNL-TR--801481; 1004683
- Country of Publication:
- United States
- Language:
- English
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