Proceedings of the International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017)

Method for vibro-acoustic signal processing for detection of nascent defect of mechanical assemblies

Authors
P. Lange, E. Yaroslavkina
Corresponding Author
P. Lange
Available Online July 2017.
DOI
10.2991/aime-17.2017.146How to use a DOI?
Keywords
nascent defect, vibro-acoustic signal, signal processing, excess of signal distribution, method of excess signal determination
Abstract

In the article, the method of early diagnostics of nascent defects of mechanical assemblies (friction nodes, bearing pairs, gears) is considered by on-line determination of high-order statistical moments of the vibro-acoustic signal. To determine such statistical moments, a parabolic spline approximation of the discrete signal values is used. The spline approximation coefficients are determined at each discrete sampling interval by digital filter expressions. Expressions for the second, third and fourth statistical moments of the vibro-acoustic signal are determined using its parabolic and cubic spline approximation. The signal processing is simple enough and can be implemented in a microprocessor controller. The characteristics of the proposed method are determined by an example of processing a vibro-acoustic signal of a harmonic shape. It is shown that with a relatively rare signal sampling, the error in determining the dispersion and the fourth statistical moment (Excess) of the signal is rather small. The use of a parabolic spline approximation of a vibro-acoustic signal makes it possible to significantly reduce the frequency of the signal sampling and to reduce the amount of data needed to determine the statistical characteristics of the signal

Copyright
© 2017, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017)
Series
Advances in Engineering Research
Publication Date
July 2017
ISBN
10.2991/aime-17.2017.146
ISSN
2352-5401
DOI
10.2991/aime-17.2017.146How to use a DOI?
Copyright
© 2017, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - P. Lange
AU  - E. Yaroslavkina
PY  - 2017/07
DA  - 2017/07
TI  - Method for vibro-acoustic signal processing for detection of nascent defect of mechanical assemblies
BT  - Proceedings of the International Conference "Actual Issues of Mechanical Engineering" 2017 (AIME 2017)
PB  - Atlantis Press
SP  - 903
EP  - 908
SN  - 2352-5401
UR  - https://doi.org/10.2991/aime-17.2017.146
DO  - 10.2991/aime-17.2017.146
ID  - Lange2017/07
ER  -