Issue №: 4(111)
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.
MATHEMATICAL MODEL OF VIBROACOUSTIC SIGNAL OBTAINED DURING VIBROACOUSTIC DIAGNOSTICS OF MACHINES
Borysiuk Dmytro – Candidate of Technical Sciences, Senior Lecturer of the department of automobiles and transport management of Vinnytsia National Technical University (21021, Vinnytsia, VoinovInternationalistov st., 7, room 3222, e-mail: bddv@ukr.net, https://orcid.org/0000-0001-8572-6959).
Tverdokhlib Igor – Candidate of Technical Sciences, Associate Professor at the Department of General Technical Disciplines and Labor Protection of Vinnytsia National Agrarian University (21008, Vinniytsia, st. Sonyachna 3, VNAU, 21008, e-mail: igor_tverdokhlib@yahoo.com, https://orcid.org/0000-0003-1350-3232).
Kupchuk Ihor – Ph. D in Engeneering, Associate Professor of the Department of General Technical Disciplines and Labor Protection, Vinnytsia National Agrarian University (3, Sonychna St., Vinnytsia, 21008, Ukraine, +380978173992, kupchuk.igor@i.ua, http://orcid.org/0000-0002-2973-6914).
Kovalchuk Oleg is an engineer at "Niva" FG.
The modern stage of development and use of diagnostic tools is characterized by intensive computerization. Computer technology is used at all stages of designing diagnostic systems, but, of course, it plays the main role in the process of processing and analyzing diagnostic information.
Vibrodiagnostics is based on measuring the characteristics of vibration processes (displacement, speed or acceleration) that are formed during the interaction of parts of a working machine or mechanism, and their analysis by various methods. The vibroacoustic signal has a complex structure that depends on the dynamics of the mechanism, as well as the type and nature of the interaction of the nodes that make it up.
Acceleration is a derivative of speed and can be used to assess the tendency of a machine's technical condition to change. The change in the amount of movement (amplitude of vibration) in the frequency spectrum is used in the tasks of finding various defects.
The vibroacoustic signal has a complex structure, contains a useful component and an obstacle that prevents accurate recognition of the information contained in the signal. In addition, distortions occur when the diagnostic signal passes through the channels from the source to the sensor.
The mathematical model of the vibroacoustic signal obtained during the vibroacoustic diagnosis of machines is presented in the article. It was determined that the time function s(t) specified in the interval [0, T] serves as a mathematical representation of the signal, which will be used to consider methods of its transformation in order to highlight its parameters and diagnostic features. The ability of the signal to provide information about the state of the object is due to the fact that some of its properties can change depending on the state change. In order for the diagnostic problem to be solved, different signals must correspond to different states of the object, and this correspondence must be mutually unambiguous.
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6. Borysyuk D. V., Spirin O. V., Tverdokhlib I. V., & Hunʹko I. V. (2017). Metodyka vyznachennya mistsya vstanovlennya akselerometriv pry vibroakustychnomu diahnostuvanni kerovanykh mostiv kolisnykh silʹsʹkohospodarsʹkykh traktoriv [The method of determining the place of installation of accelerometers during vibroacoustic diagnosis of steerable bridges of wheeled agricultural tractors]. Podilʹsʹkyy visnyk: silʹsʹke hospodarstvo, tekhnika, ekonomika - Podilsky Visnyk: agriculture, technology, economy, 27, 112-119 [in Ukrainian].
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About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University is the chief editor of the "Vibrations in engineering and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.
