PSI - Issue 59

O. Fomin et al. / Procedia Structural Integrity 59 (2024) 516–522 Oleksij Fomin, Pavlo Prokopenko, Yevhenii Medvediev, Larysa Degtyareva / Structural Integrity Procedia 00 (2023) 000 – 000 5

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Software and mathematical support for evaluating and registering indicat ors of the railway rolling stock’s movement quality in operating conditions. The software for evaluating the obtained experimental data of movement quality indicators is developed in the LabView software shell. The LabView software system implements the process of in-depth processing of the results of running dynamic tests to identify the relationships between the oscillatory processes of load-bearing structures, estimate the frequencies at which the interaction between them occurs, and determine the levels of interaction. The above-mentioned processing of the test results consists in performing a correlation and spectral analysis of the processes investigated for various elements of the load-bearing structures. Below is a block diagram of the developed software for evaluating the obtained experimental data of traffic quality indicators and consists of 5 main blocks: • block 1 – input processing parameters and place of creation of the resulting file; • block 2 – reading binary data from primary files. Data conversion from binary to text and numeric; • block 3 – definition of the data array used in further work. Correlation of GPS data with data from strain gauges and accelerometers; • block 4 – filling of the data array according to the specified processing requirements in block 1; • block 5 – recording the resulting file in text form, a diagram. The software of the mobile data collection and registration system performs registration, storage and visualization of changes in information channels (accelerometers, strain gauges). GPS module readings are used to analyze the influence of movement speed on changes in research parameters. Fig. 3 shows a block diagram of the system for collecting and registering measured parameters.

Fig. 3. The flowchart of the mobile system.

The hardware part of the mobile system for running dynamic tests and evaluation of movement quality and safety indicators based on National Instruments CompactRIO solves a wide list of tasks to monitor the technical condition of rolling stock during tests and in normal operation. The mobile system can work in two functional modes: evaluation of quality indicators, traffic safety, and strength indicators in real-time, and measurement of acceleration and deformation values in autonomous mode on rolling stock with further processing. During the processing of the obtained values, the data obtained with the help of the GPS receiver are used to assess the impact of the change in the speed of movement on the controlled parameters. The general block diagram of the mobile diagnostic system is shown in Fig. 4.