Випуск 55

Постійне посилання зібранняhttps://dspace.khadi.kharkov.ua/handle/123456789/24843

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Experimental study of the influence of the damping coefficient of a semi-active suspension on vehicle acceleration during starting
(Харківський національний автомобільно-дорожній університет, 2024) Shuklinov, S.; Tkachov, О.; Шуклінов, С. М.; Ткачов, О. Ю.
Problem. The influence of the damping coefficient of a semi-active suspension on vehicle acceleration during starting can be determined experimentally. The experimental research method is the most accurate for obtaining real data, as it accounts for vehicle parameters and the specific operation of the suspension system. This study conducted an experimental investigation of the acceleration process of a vehicle equipped with a semi-active suspension. The effect of the suspension damping coefficient on vehicle acceleration was determined for the first and second gears. The vehicle selected for the study was a Land Rover Evoque equipped with a CVSA suspension system from Tenneco. Speed, acceleration, and distance parameters of the vehicle were measured under conditions of low and high suspension damping. For a clear representation of the research results, graphical dependencies of speed, acceleration, and distance on time were constructed using MATLAB software. The results were analyzed, and corresponding conclusions were drawn. Goal. The purpose of the study is to validate the theoretical research on the influence of the damping coefficient of a semi-active suspension on vehicle acceleration during starting under road conditions. Methodology. The approaches adopted in this study to achieve the objective are based on the principles of vehicle theory. Results. It has been established that a vehicle with a high suspension damping coefficient has a greater impact on acceleration in first and second gears compared to a vehicle with a low damping coefficient. It was determined that the acceleration of a vehicle with high suspension damping during first-gear acceleration is higher than that of a vehicle with low damping. During the shift from first to second gear, the suspension settings do not affect vehicle acceleration. In second-gear acceleration, the vehicle with high suspension damping also exhibits higher acceleration than with low damping. Corresponding data were obtained showing different acceleration distances for vehicles with high and low suspension damping over the same period of time. Originality. The results of the study provided an insight into the impact of suspension on vehicle acceleration when using different gears. Practical value. The results of the experimental study enable a comparative analysis of the theoretical research on the influence of the damping coefficient on vehicle acceleration. Moreover, the obtained data can be utilized in the design of new vehicles or in the improvement of sports cars, such as dragsters.
Maneuverability and off-road capability of a four-axle vehicle with swivel bogies and electrically driven wheels
(Харківський національний автомобільно-дорожній університет, 2024) Yeremenko, A.; Smetanin, G.; Єременко, А. В.; Сметанін, Г. В.
Problem. The issues of maneuverability and off-road capability in four-axle vehicles involve ensuring their efficient operation on rough terrain, in narrow or confined spaces, and under challenging operating conditions. Key challenges include reducing the turning radius, achieving even load distribution across axles, and minimizing energy losses during movement. Additionally, it is crucial to ensure the reliable performance of all drivetrain components, particularly under increased wear and exposure to external factors. Goal. The objective of the study is to develop and substantiate technical solutions aimed at improving the maneuverability and off-road capability of four-axle vehicles by optimizing the design of the running gear, implementing innovative drives, and enhancing the control system. This will ensure the efficient operation of vehicles under challenging conditions, improve their energy efficiency and reliability, and expand the scope of their applications. Methodology. The methodology for implementing the maneuverability and off-road capability of a four-axle vehicle with swiveling bogies and electric wheel drive includes the analysis and modeling of the vehicle's reaction to various operating conditions, as well as optimizing the drive and control systems to ensure high movement efficiency on challenging routes. Results. The results of the research on the maneuverability and off-road capability of a four-axle vehicle with swiveling bogies and electric wheel drive have improved the turning efficiency of such a vehicle on challenging terrain with steep slopes and uneven areas without road coverage. By optimizing the design of the bogies and implementing electric wheel drives, it was possible to reduce the weight and geometric parameters of the vehicle, allowing for more precise maneuvers in confined spaces while maintaining stable movement with sufficiently high off-road capability and aneuverability of the four-axle vehicle. Originality. The originality of the research lies in the comprehensive approach to improving the maneuverability and off-road capability of a four-axle vehicle with swiveling bogies and electric wheel drive. For the first time, innovative methods for optimizing the design of the running gear and implementing electric drives were applied, which significantly reduced energy losses and improved motion control on challenging terrain. New approaches to modeling movement ensured high maneuvering efficiency under various operating conditions. These results provide new opportunities for the application of such vehicles in specialized industries where the requirements for off-road capability and maneuverability are extremely high. Practical value. The practical significance of the research lies in the potential implementation of the developed technical solutions in the production of four-axle vehicles for operation in challenging conditions, such as construction, agriculture, and military applications. The improvements developed allow for enhanced equipment efficiency, reduced energy consumption, and high maneuverability and off-road capability on difficult routes.

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