Progressive physical and moral deterioration of electric multiple-unit train fleet necessitates ensuring of the required level of safe running as well as fulfillment of a train schedule by increasing the reliability and operational readiness of rolling stock. Statistical data analysis shows that electric apparatus of electrical control circuits of traction electric drive cause up to 40% of failures, inadequate quality of maintenance and operating repairs, which are carried out at railway repair services, cause 75% of failures.
The lack of technical equipment and methods of getting of objective information on the quality of repairs determine such situation. In this regard the task of technological retooling of railway enterprises (with large-scale implementation of advanced technologies and modern means of objective control of rolling stock condition - the means of technical diagnostics) becomes urgent.
The study of physical properties and malfunctions of diagnosing object and development of its diagnostic model, which is necessary for diagnosing algorithm construction, must be a preliminary to development of the tools for technical diagnosing.
Functional-logic model reflects operating mode of equipment and order of its starting. In addition, such model determines the structure of hardware and software system, its equipment and diagnostic program. A diagnostic program in turn determines a necessary sequence of actions that is specified according to the train operating condition - a functional-test diagnostics.
The analysis of the object diagnostic models enables to formulate the efficiency condition, to determine the malfunction criteria and to select a limited set of characteristics, indexes or parameters, which should be controlled during the process of diagnosing. When choosing the methods of diagnostics it is necessary to take proper account of the possibility of their technical realization, embodiment and operating conditions of the object.
KostyukovV.N., Kazarin D.V., Kashkarov P.B. Diagnostic model of electrical control circuits of traction electric drive of electric multiple-unit train // Nauka, obrazovanie, biznes (Science, education, business). - 2007. - pp. 80-84
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