Інформаційні технології

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Browsing Інформаційні технології by Subject "NATURAL SCIENCES::Physics"

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    Estimation of fuel consumption in standard driving cycles and in real bus operation
    (ПП «Технологічний центр», Полтавська державна аграрна академія, 2025) Ruban, Dmytro; Krainyk, Lybomyr; Ruban, Hanna; Рубан, Ганна Яківна; Shevchuk, Viktor; Artyukh, Oleksandr; Mahats, Miron; Sukach, Oleg; Khotunov, Vladyslav; Хотунов, Владислав Ігорович
    The object of research is the basic fuel consumption of a bus in standard urban cycles and identical conditions in real operation. Standard driving cycles are used to estimate fuel consumption. This allows consumers to compare buses and choose the best one, and manufacturers in the process of improving buses also allow them to estimate fuel consumption. However, sometimes standards may not correspond to reality. Therefore, specific routes are developed for some cities, which requires significant development costs. This problem is solved by collecting reliable information on average fuel consumption with an operating period of 1 year and bus mileage of 40–90 thousand km. As a rule, operating organizations do not provide such information. The development of electronic control systems allows to obtain information from "black boxes" additionally installed by the manufacturer, which record information throughout the entire service life of the bus. This approach is implemented in this work .Existing standards for determining fuel consumption in urban driving cycles are presented. The results of modeling and real tests are presented. Information was collected from the "black boxes" on fuel consumption on 12 buses for 1 year of operation with mileage from 40 to 90 thousand km on Ataman A092N6 buses. Fuel consumption was 16.4–21.2 l/100 km when operating buses in one city (the manufacturer claims up to 23 l/100 km). This makes it possible to solve the problem of collecting reliable information on fuel consump-tion based on year-round operation of buses, which has not been carried out in this format before.The results of this study will allow operating organizations to see the real fuel consumption on Ataman A092N6 buses in the city. Implementation of this approach on other buses will allow obtaining data for interested organizations in a similar way. This will allow estimating fuel consumption without additional tests, which will reduce research costs.
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    Identifying the influence of micro profile of rural roads on the durability of bus body when carrying passengers
    (Український державний університет залізничного транспорту, ПП «Технологічний центр», 2025) Ruban, Dmytro; Krainyk, Lybomyr; Ruban, Hanna; Рубан, Ганна Яківна; Khimka, Stepan; Sukach, Oleg; Khotunov, Vladyslav; Хотунов, Владислав Ігорович; Shevchuk, Viktor; Dufanets, Ihor; Artyukh, Oleksandr
    The object of this study is the durability of a bus body when passengers are transported on rural roads. According to the European classification, the total length of roads in Ukraine that correspond to the first category does not exceed 5 %. That is, all other 95 % of roads have a quality level that does not meet the regulatory operating conditions. In particular, in rural areas, buses are operated both on worn asphalt-concrete surfaces and on dirt and gravel roads. Such operating conditions additionally lead to intensive wear of buses and significantly worsen the durability of their bodies. The task to determine the influence of worn and dirt roads on the durability of the bus body during passenger transportation in rural areas could be solved by the durability assessment procedure proposed in this paper. The current work presents patterns that make it possible to predict the degradation of the bus body material that affect the durability of the body. The factors of influence during the operation of buses on rural routes have been substantiated and presented. The simulation results show that when operating buses on rural roads, cracks in the body frame of the body occur at runs that are 3.8–13.1 times less than under regulatory operating conditions. The proposed procedure for assessing the durability of a bus body when transporting passengers on rural roads makes it possible to predict the deterioration of the physical and mechanical properties of the elements of the bus body frame and take measures at the design stage to increase their reliability and durability.
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    Polynomial Estimates of Measurand Parameters for Data from Bimodal Mixtures of Exponential Distributions
    (Karagandy University of the name of academician E.A. Buketov, 2018) Zabolotnii, Serhii; Заболотній, Сергій Васильович; Kucheruk, V. Yu.; Warsza, Zygmunt Lech; Khassenov, А. K.
    A non-conventional approach to finding estimates of the result of multiple measurements for a random error model in the form of bimodal mixtures of exponential distributions is proposed. This approach is based on the application of the Polynomial Maximization Method (PMM) with the description of random variables by higher order statistics (moment & cumulant). The analytical expressions for finding estimates and analysis accuracy to the degree of the polynomial r = 3 are presented. In case when the degree of the polynomial r = 1 and r = 2 (for symmetrically distributed data) polynomial estimate equivalent can be estimated as a mean (average arithmetic). In case when the degree of the polynomial r = 3, the uncertainty of the polynomial estimate decreases. The reduction coefficient depends on the values of the 4th and 6th order cumulant coefficients that characterize the degree of difference while the distribution of sample data from the Gaussian model. By means of multiple statistical tests (Monte Carlo method), the properties of the normalization of polynomial estimates are investigated and a comparative analysis of their accuracy with known estimates (mean, median and center of folds) is made. Areas that depend on the depth of antimodality and sample size, in which polynomial estimates (for r = 3) are the most effective.
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    Predictive Assessment of Bus Body Life in the Matlab Simulink Software Environment
    (University of Žilina, 2024) Ruban, Dmytro; Lanets, Olena; Kraynyk, Lubomyr; Kovalyshyn, Stepan; Ruban, Hanna; Рубан, Ганна Яківна; Madleňák, Radovan; Maciaszczyk, Magdalena
    The lifespan prediction of the bus body of the load-bearing structure has been made and compared to the results of real operation. The maximum approximation of the simulation modelling results in Matlab Simulink to real operation is explained by taking into account a sufficient number of factors influencing durability. This research has the particularity that it allows determining the durability of the bus body even at the design stage, which was not possible with accelerated tests or during the operation of the bus on real routes. The obtained results can be used by bus manufacturers at the design stage, allowing them to change the construction and technology of anticorrosion protection, thereby influencing the durability. In addition, operating organizations will be interested in the obtained results when using the developed methodology in various operating conditions.