Synthesis of the expert diagnostic system of the electric drive of the vehicle

Authors

  • Юрій Миколайович Бороденко Kharkov National Automobile and Highway University, Ukraine

DOI:

https://doi.org/10.30977/VEIT.2018.13.0.108

Abstract

The trend in the development of vehicles with electric traction determines the urgency of operational control of the technical condition of vehicles of this class. The use of integrated diagnostic systems on the basis of expert programs on board the vehicle can reduce operating costs while maintaining it and increase traffic safety. The goal of the work, at this stage, is to synthesize the diagnostic system. Two problems are solved: determination of the procedure for forming the knowledge base of the expert system (data library) and constructing a functional diagram of the integrated system for monitoring the current values of the diagnostic parameters and identifying the technical state of the electric drive. The methodology of forming a data library consists of conducting a natural or virtual experiment. As the object of diagnostics, the power part of the electric drive system of the vehicle with one valve synchronous machine functioning in the status of the traction motor and generator is considered. The procedure for forming the knowledge base of the expert system is to register the spectral composition of the current function in the power supply circuit of the electric drive and to accumulate diagnostic information during the simulation of the damage to its elements in operating conditions. Monitoring of the mode and technical conditions of the electric drive is carried out on the basis of the parameters of the periodic signal of the contactless current sensor of the traction battery, which is converted by the spectrum analyzer and converted into coded information. The generalized scheme of forming the knowledge base of the expert system and the functional diagram of the integrated self-diagnostic system for identifying the technical state of the electric drive are presented. The parameters of the general memory format required for storing the library data in the code representation are determined. At the preliminary stage of development, virtual studies of the simulation model of the electric drive built in the Matlab/Simulink program were performed to form the reference values base for the diagnostic parameter (spectrogram) of the expert system. The expert diagnostic system of the proposed structure is capable of solving several problems of passive and active diagnostics: determining the faulty element of the electric drive; provide an emergency mode of operation by reserving hardware elements and software replacement of lost information; to establish the causes and patterns of the manifestation of malfunctioning elements in operational modes; minimize the negative consequences of damage to components and installation; anticipate system emergency.

 

Key words:

electric drive; brushless machine; traction battery; voltage converter; spectral analysis; diagnostic system; expert program.

Author Biography

Юрій Миколайович Бороденко, Kharkov National Automobile and Highway University

Assoc. Prof., Ph. D. (Phys.-Maht.)

References

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Пристатейна бібліографія ДСТУ

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On-board diagnostics. / Матеріали сайту – 2018. – Режим доступу: https://en.wikipedia.org/wiki/.

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Published

2018-05-16

How to Cite

Бороденко, Ю. М. (2018). Synthesis of the expert diagnostic system of the electric drive of the vehicle. Vehicle and Electronics. Innovative Technologies, (13), 108–114. https://doi.org/10.30977/VEIT.2018.13.0.108

Issue

Section

EQUIPMENT FOR MANUFACTURE AND REPAIR OF TRANSPORTATION. SERVICE AND TECHNICAL REVIEW OF CARS