SPECTRAL ANALYSIS FOR NON-STATIONARY SIGNALS FROM MECHANICAL MEASUREMENTS: A PARAMETRIC APPROACH
✍ Scribed by S. CONFORTO; T. D'ALESSIO
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 408 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0888-3270
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✦ Synopsis
Non-parametric time}frequency methods for spectral estimation are increasingly used in the analysis of non-stationary signals. However, neither have their performance and limits of application been completely investigated nor has a comparison with other methods, such as parametric ones, been clearly established. This paper deals with the analysis of nonstationary signals of interest in mechanics, and more speci"cally, E the performance of some non-parametric methods widely used for this analysis will be discussed; E an autoregressive time-varying method, improved with respect to the classical parametric implementation, will be presented and its potential in analysing signals coming from mechanical systems will be shown; E the performance of parametric and non-parametric methods will be compared.