Devising a Procedure for Calculating the Technical Condition Index of Locomotive Nodes Based on Monitoring Results
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Technology Center, Kharkov, Ukraine
Abstract
ENG: The widespread introduction of information technologies in
the systems that manage technical fleets, the use of maintenance
and repair systems based on risk assessment, is based on the calculation
of a large enough number of indicators. Modern locomotives
are equipped with systems for monitoring and diagnosing
technical condition. Combining these systems with the Internet
of Things and Big Data technologies provides an opportunity
to use completely new approaches to fleet management. At the
initial stage of the construction of such systems, it is necessary
to devise criteria that make it possible to automatically determine
the technical condition of a locomotive and its components
in order to identify the locomotive in the total fleet that requires
maintenance or repair.
A procedure has been proposed for calculating the technical
condition index of locomotives and their components based
on data from monitoring systems. The procedure is based on the
formation of latent diagnostic parameters employing the principal
component method and on the subsequent calculation of the
weight coefficients of these parameters applying the method of
hierarchy analysis. The special feature of the proposed procedure
is that when calculating the index, those latent diagnostic parameters
are used that are derived from the group of control parameters
whose weight coefficients are computed using the method of
hierarchy analysis without involving experts.
This paper reports the results from calculating the informativeness
of the diagnostic parameters of load, loss, input, as well
as their weight coefficients. The highest information content, from
0.5 to 0.85, is demonstrated by the load parameter; the smallest
(0.05‒0.26) ‒ the input parameter. The average value and
the dependences of changes in the technical condition index of
a hydraulic transmission during the tests have been determined.
Analysis of the technical condition index makes it possible to
assess the transmission’s response to changes in test modes, the
dynamics of changes in losses.
Description
B. Bodnar: ORCID 0000-0002-3591-4772, O. Ochkasov: ORCID 0000-0002-7719-7214, M. Ochkasov: ORCID 0000-0002-9198-0758
Keywords
technical condition index, informativeness, diagnostic parameters, principal components, hydraulic transmission, КЛ
Citation
Bodnar B., Ochkasov O., Ochkasov M. Devising a Procedure for Calculating the Technical Condition Index of Locomotive Nodes Based on Monitoring Results. Eastern-European Journal of Enterprise Technologies. 2021. Vol. 5, Iss. 3 (113). P. 37–45. DOI: 10.15587/1729-4061.2021.242478.