The instantaneous frequency rate spectogram

Krzysztof Czarnecki

doi:10.1016/j.ymssp.2015.06.029

The instantaneous frequency rate spectogram

Abstract

An accelerogram of the instantaneous phase of signal components referred to as an instantaneous frequency rate spectrogram (IFRS) is presented as a joint time-frequency distribution. The distribution is directly obtained by processing the short-time Fourier transform (STFT) locally. A novel approach to amplitude demodulation based upon the reassignment method is introduced as a useful by-product. Additionally, an estimator of energy density versus the instantaneous frequency rate (IFR) is proposed and referred to as the IFR profile. The energy density is estimated based upon both the classical energy spectrogram and the IFRS smoothened by the median filter. Moreover, the impact of an analyzing window width, additive white Gaussian noise and observation time is tested. Finally, the introduced method is used for the analysis of the acoustic emission of an automotive engine. The recording of the engine of a Lamborghini Gallardo is analyzed as an example.

Citations

3 2

CrossRef
0

Web of Science
3 8

Scopus

Author (1)

Krzysztof Czarnecki dr inż.

Cite as

Full text

full text is not available in portal

full content of the article see on external site open in new tab

Keywords

Details

Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: MECHANICAL SYSTEMS AND SIGNAL PROCESSING no. 66-67, pages 361 - 373,
ISSN: 0888-3270
Language:: English
Publication year:: 2016
Bibliographic description:: Czarnecki K.: The instantaneous frequency rate spectogram// MECHANICAL SYSTEMS AND SIGNAL PROCESSING. -Vol. 66-67, (2016), s.361-373
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.ymssp.2015.06.029
Verified by:: Gdańsk University of Technology