This paper presents a new method for the classification of nonlinear systems based on the time-frequency analysis of the free oscillations. In particular, oscillators described by a nonlinear second-order differential equation are considered. The nonlinearity is due to a nonlinear function of the state variable, which produces free oscillations with a time-variant spectrum. The classification is based on two different estimates of the fundamental frequency of the free oscillations. The comparison between the two estimates allows a very efficient system classification. Both the proposed estimators and the way of combining the two estimates are new. Validation tests have shown the high performances of the proposed technique.
A method for nonlinear system classification in the time-frequency plane / GALLEANI L.; LO PRESTI L.; DE STEFANO A.. - In: SIGNAL PROCESSING. - ISSN 0165-1684. - STAMPA. - 65:1(1998), pp. 147-153. [10.1016/S0165-1684(98)00029-2]
Titolo: | A method for nonlinear system classification in the time-frequency plane | |
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Data di pubblicazione: | 1998 | |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0165-1684(98)00029-2 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11583/1662978