<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The method presented in the paper is based on in-the-loop computing applied for impulse response to obtain a spectrum with a much higher frequency resolution than using FFT. Then, higher spectrum frequency resolution results in greater accuracy in estimation of natural frequencies. The frequency resolution of estimated spectrum in this method is completely independent of the length of impulse response and, by extension, the method eliminates the problem of spectral resolution limitation using FFT due to finite length of recorded signals. This fact is very useful and is the main advantage of the proposed method. The results of the method have been shown and compared in quantitative terms to natural frequencies estimated using classical FFT with zero-padding as reference method.</p>
</abstract>

The method presented in the paper is based on in-the-loop computing applied for impulse response to obtain a spectrum with a much higher frequency resolution than using FFT. Then, higher spectrum frequency resolution results in greater accuracy in estimation of natural frequencies. The frequency resolution of estimated spectrum in this method is completely independent of the length of impulse response and, by extension, the method eliminates the problem of spectral resolution limitation using FFT due to finite length of recorded signals. This fact is very useful and is the main advantage of the proposed method. The results of the method have been shown and compared in quantitative terms to natural frequencies estimated using classical FFT with zero-padding as reference method.

A Method for Improving the Accuracy of Natural Frequency Measurement Using In-the-loop Computing

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The method presented in the paper is based on in-the-loop computing applied for impulse response to obtain a spectrum with a much higher frequency resolution...

A Method for Improving the Accuracy of Natural Frequency Measurement Using In-the-loop Computing

Published Online: Aug 13, 2021

Page range: 93 - 98

Received: Jul 01, 2021

Accepted: Aug 05, 2021

DOI: https://doi.org/10.2478/msr-2021-0013

Keywords
Natural frequency, measurement accuracy improvement, in-the-loop computing, impulse response

© 2021 Adam Kotowski, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A Method for Improving the Accuracy of Natural Frequency Measurement Using In-the-loop Computing

Published Online: Aug 13, 2021

Page range: 93 - 98

Received: Jul 01, 2021

Accepted: Aug 05, 2021

DOI: https://doi.org/10.2478/msr-2021-0013

KeywordsNatural frequency, measurement accuracy improvement, in-the-loop computing, impulse response

© 2021 Adam Kotowski, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Natural frequency, measurement accuracy improvement, in-the-loop computing, impulse response