DIAGNOSTICS OF ELECTRONIC EQUIPMENT OF PASSENGER CARS BASED ON COMPONENT RELIABILITY ASSESSMENT

As is known, one of the critical challenges in Ukraine's railway transport sector in recent years has been ensuring the reliability of passenger cars. Increasing train speeds, enhancing safety levels, and meeting higher passenger comfort requirements necessitate ensuring high operational reliability of passenger cars. Reducing passenger car downtime and improving their operational readiness can be achieved by minimizing the time required to assess the operability of electronic equipment and locate failures within its electronic components. This issue can be addressed by conducting research, developing, and implementing advanced methods for reliability assessment, as well as technical diagnostic methods and tools for passenger car equipment. The authors of this article have developed a methodology for assessing the design reliability of passenger car electronic equipment. Using this methodology, a study was conducted on the design reliability of automation devices integrated into passenger car control panels. The reliability of the electronic equipment was standardized, and reliability parameters were calculated considering operational coefficients. A modern passenger car is a complex engineering system, consisting of a combination of mechanical, electronic, and electrical systems. Up to 75 % of the total repair time for systems is spent on fault localization in complex radio-electronic systems, including preparation for fault detection. The most critical automation devices include the electronic blocks of the generator voltage regulator, frequency relay, battery charge control, and protection units. Therefore, when troubleshooting and monitoring operability, it becomes crucial to determine the most optimal sequence of operations, ensuring the shortest possible verification time for electrical equipment. The research results can significantly reduce the time required to locate faults in the electronic blocks of passenger cars, thus enhancing their reliability and operational readiness. Based on the calculated reliability parameters of the car’s electronic blocks, a new diagnostic technology has been proposed. This technology considers the calculated reliability parameters, the time required for diagnosing components, and determines the optimal sequence for diagnosing electronic equipment according to a calculated priority criterion.