Digital Acoustic Signal Processing Methods for Diagnosing Electromechanical Systems

Polyvoda, Oksana; Rudakova, Hanna; Kondratieva, I. U.; Rozov, Yuriy; Lebedenko, Yu.O.

doi:10.1007/978-3-030-26474-1_7

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…-обтиснення групою валків (роликів), робочі поверхні яких утворюють замкнутий контур [2], аналогічно до (рис. 2) або іншими методами, що також застосовують обтиснення через суцільний замкнутий контур [3][4][5][6].…”

Section: вступunclassified

“…2 (обтискання) з точки зору створення напружено-деформованого стану та протікання пластичних деформацій в зразку -практично відсутні. Радіальне кування [7,8,9], зокрема, може проводиться на устаткуванні типу SНК-17 австрійської фірми GFM, яка є фактичним монополістом у виробництві цього виду обладнання [2]. До головних переваг радіального кування відносяться те, що даний спосіб дозволяє отримувати вироби з внутрішньою поверхнею необхідної геометрії з достатньою точністю.…”

Section: вступunclassified

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Universal research installation for compression of tubular billets

Titov¹,

Godziy²,

Myronenko³

2022

Mech. Adv. Technol.

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The research was conducted at the Department of Aircraft Technology and Design of the Educational and Research Institute of Mechanical Engineering of the National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”. On the basis of performance of scientific subjects concerning compression of a tubular cavity preparation with formation of an internal cavity the most perspective schemes of such technological processing were investigated and technological and constructive elements of processes and the equipment were defined. Indicators such as quality (compliance of the product with the requirements of use) and its cost, process productivity, technical and economic characteristics and versatility of the equipment were taken into account. To experimentally confirm the chosen direction of implementation, first of all, experimental equipment was designed and the technical process was modeled according to each of the proposed schemes.

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Section: вступunclassified

Universal research installation for compression of tubular billets

Titov¹,

Godziy²,

Myronenko³

2022

Mech. Adv. Technol.

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“…To convert a normalized LPF to a band-pass filter (BPF) [12] with lower f 1 and upper f 2 frequency range and bandwidth Δf = f 2 − f 1 , with an average frequency…”

Section: Spectral Analysis Of Acoustic Signals Noises Of Devices and Machines Charac-mentioning

confidence: 99%

Research of Acoustic Signals Digital Processing Methods Application Efficiency for the Electromechanical System Functional Diagnostics

Rudakova

Polyvoda

Kondratieva

et al. 2021

Lecture Notes in Computational Intelligence and Decision Making

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The article is devoted to researching of application efficiency of acoustic signals digital processing methods for the electromechanical systems (EMS) functional diagnostics in real time. The steps according to which it is necessary to carry out the analysis of the acoustic signals generated during operation of EMS for construction and adjustment of functional diagnostics systems are offered. The primary task is to study the statistical properties of acoustic signals. The next step is spectral analysis of acoustic signals. In the process of acoustic signal conversion after its hardware processing, the limits of the informative part of the signal are determined on the basis of spectral analysis based on Fourier transform of the signal. It is proposed to use logic-time processing based on the estimation of the normalized energy spectrum and spectral entropy to determine the frequency range of the informative part of the signal. The expediency of using the autoregressive model of the moving average as an acoustic signal model is substantiated. The problem of building mathematical models on the basis of which it is possible to adequately identify the intensity of work and the state of the equipment is solved. The procedure for identifying the parameters of the signal model by the recurrent least squares method is given, which allows to analyze the state of the equipment in real time. It is proposed to use multiplescale analysis to speed up the process of signal analysis and reduce the amount of calculations.

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