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MATHEMATICAL MODEL FOR DETERMINING THE INDICATORS OF TRACTIVE VEHICLES

Authors :
A. F. Golovchuk
Source :
Nauka ta progres transportu, Vol 69, Iss 3, Pp 92-101 (2017)
Publication Year :
2017
Publisher :
Ukrainian State University of Science and Technologies, 2017.

Abstract

Purpose. The research paper involves solving of the following tasks: 1) refinement of the mathematical model for determining the traction and dynamic, fuel and economic, environmental indicators of mobile energy facilities; 2) methodology development of theoretical studies of automatic control systems, static and dynamic characteristics automotive-tractor diesel with a gas turbine supercharger and a mobile power facility. Methodology. The work studies the working processes of vehicles and machine-tractor aggregates by mathematical simulation and the development of algorithms and programs for the calculation of these processes in actual operational conditions. The system of equations has been developed for theoretical research. It describes a nonlinear mathematical model of the automatic control system of an automotive-tractor diesel rotating frequency. In addition to the differential equations of the first and second order, equations are used in mathematical simulation of working processes of traction vehicles. These equations describe experimental characteristics of an automatic regulator, a high-pressure fuel pump, a turbocharger and an engine, as well as moments of engine mechanical losses and an external load. Findings. The developed mathematical model allows determining the effectiveness of new design, operational and technological developments, as well as various measures in order to improve the fuel-economic and environmental performances of vehicles and machine-tractor aggregates in operating conditions. Originality. For the first time, the mathematical model "Tractor driver – machine-tractor aggregate – road (field)" was developed. It allows conducting research of transport tractor aggregates by driving cycles, taking into account the processes of starting and speeding up the mobile-power sources with gear shift. Practical value. In conditions of a protracted economic crisis, in the absence of the necessary equipment, instruments, combustible and lubrication materials, comparative research of mobile power sources can be carried out thanks to the developed mathematical models with corresponding algorithms and programs that are brought to practical use. For these computer programs State Intellectual Property Service of Ukraine issued Certificates on registration of copyright No. 49285, No. 49286, No. 49287 of May 22, 2013.

Details

Language :
English, Ukrainian
ISSN :
23073489 and 23076666
Volume :
69
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Nauka ta progres transportu
Publication Type :
Academic Journal
Accession number :
edsdoj.8ddaf51a1a144a31928abca01ac75475
Document Type :
article
Full Text :
https://doi.org/10.15802/stp2017/104189