Operational Modal Analysis (OMA) allows systems structural identification in working conditions, moving from output data only. Although OMA appears as a revolutionary technique, its main drawback is that, to be applicable, one must assume that the excitations are modelled as uncorrelated white noises. These assumptions, in fact, are heavily binding in all those cases in which the present environmental actions cannot be described as white noises: systems having rotating parts (machine tools, engines or wind turbines) or characterised by speed and/or time correlated inputs (road and rail vehicles). In this paper we perform the modal estimation applying a frequency domain procedure based on the description of a generalized modal model of output PSDs (Power Spectral Densities). Specifically, the proposed OMA technique requires a limited knowledge about features related to the source of excitation and, therefore, it is applicable to systems for which something about the inputs is somehow known.

A generalized operational modal analysis framework for challenging no-next engineering applications / De Carolis, Simone; De Filippis, Giovanni; Palmieri, Davide; Soria, Leonardo. - ELETTRONICO. - (2020), pp. 1819-1832. (Intervento presentato al convegno 29th International Conference on Noise and Vibration engineering, ISMA2020 tenutosi a Virtual (Leuven, Belgium) nel September 7-9, 2020).

A generalized operational modal analysis framework for challenging no-next engineering applications

De Carolis Simone;De Filippis Giovanni;Palmieri Davide;Soria Leonardo
2020-01-01

Abstract

Operational Modal Analysis (OMA) allows systems structural identification in working conditions, moving from output data only. Although OMA appears as a revolutionary technique, its main drawback is that, to be applicable, one must assume that the excitations are modelled as uncorrelated white noises. These assumptions, in fact, are heavily binding in all those cases in which the present environmental actions cannot be described as white noises: systems having rotating parts (machine tools, engines or wind turbines) or characterised by speed and/or time correlated inputs (road and rail vehicles). In this paper we perform the modal estimation applying a frequency domain procedure based on the description of a generalized modal model of output PSDs (Power Spectral Densities). Specifically, the proposed OMA technique requires a limited knowledge about features related to the source of excitation and, therefore, it is applicable to systems for which something about the inputs is somehow known.
2020
29th International Conference on Noise and Vibration engineering, ISMA2020
9789082893113
A generalized operational modal analysis framework for challenging no-next engineering applications / De Carolis, Simone; De Filippis, Giovanni; Palmieri, Davide; Soria, Leonardo. - ELETTRONICO. - (2020), pp. 1819-1832. (Intervento presentato al convegno 29th International Conference on Noise and Vibration engineering, ISMA2020 tenutosi a Virtual (Leuven, Belgium) nel September 7-9, 2020).
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/216197
Citazioni
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 0
social impact