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Mechanika

Mechanika
88 (4/16), DOI: 10.7862/rm.2016.26

Improvement in accuracy of natural frequency determination based on the envelope of cross-correlation function

Adam Kotowski

DOI: 10.7862/rm.2016.26

Abstract

This paper presents a method of improvement of the accuracy in natural frequency determination when having impulse responses from impact testing. A new method is used for obtaining impulse response spectrum. The improvement in natural frequency determination is a result of improving the spectral resolution. For this, the new method uses calculation of surface area under the envelope of the cross-correlation function. This process is repeated by single-harmonic signal generated step-by-step with frequency changed iteratively. Thus the frequency resolution of determined spectrum is independent of length of analysed impulse response.

Full text (pdf)

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About this Article

TITLE:
Improvement in accuracy of natural frequency determination based on the envelope of cross-correlation function

AUTHORS:
Adam Kotowski

AUTHORS AFFILIATIONS:
Bialystok University of Technology

JOURNAL:
Mechanika
88 (4/16)

KEY WORDS AND PHRASES:
natural frequency, determination, improvement, envelope

FULL TEXT:
http://doi.prz.edu.pl/pl/pdf/mechanika/190

DOI:
10.7862/rm.2016.26

URL:
http://dx.doi.org/10.7862/rm.2016.26

RECEIVED:
2016-11-14

ACCEPTED:
2016-12-12

COPYRIGHT:
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