Mobility and Vehicle Mechanics

Number 1, 47

1-13
CONTRIBUTION TO THE RESEARCH OF SIDESLIP ANGLE INFLUENCE ON VEHICLE STEERABILITY

Authors: Stefan Milićević

Abstract

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Number of views: 212

Knowing the limits of transverse handling and vehicle stability is very important from the aspect of designing a system aimed at improving handling and safety. One of the phenomena that have a great impact on vehicle stability and handling is the sideslip angle. Unfortunately, direct measurement of the sideslip angle requires very complex and expensive equipment that is not suitable for installation on ordinary passenger vehicles; therefore, this quantity must be estimated on the basis of measurements of other parameters. As a result of limited information, this parameter is mainly estimated or linearized relative to lateral force when used for calculations though such calculations can be less accurate. In this paper it is concluded that a clear relationship can not be formed between the lateral force and the sideslip angle and that for precise determination of the sideslip angle several parameters need to be known such as tire construction, tire pressure, rim diameter, wheel camber as well as micro and macro road structure.

15-25
TESTING THE CHARACTERISTICS OF THE DRIVER - MOTORCYCLE - ROAD SYSTEM ON THE TECHNICAL INSPECTION LINE

Authors: Ivan Mačužić, Branislav Aleksandrović, Marko Đapan

Abstract

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Number of views: 223

The characteristics of the motorcycle in relation to the driver's behavior significantly affect traffic safety. Motorcycle accidents are usually more severe. The specifics of the construction and the very complexity of the kinematics and dynamics of the motorcycle to a considerable extent complicate the comparative implementation of theoretical and experimental research. The research of the stated characteristics was realized on the line of technical inspection. These obtained results could be used in order to educate motorcyclists in order to increase the overall traffic safety

27-48
SIMULATION OF ROAD TRAFFIC NOISE POLLUTION IN KRAGUJEVAC USING QGIS SOFTWARE

Authors: Angelina Pavlović, Goran Bošković, Nebojša Jovičić

Abstract

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Number of views: 176

Noise is characterized as an environmental problem that represents an exceptional danger to human health. With increased urbanization and motorization, road traffic has been identified as the dominant source of noise in urban areas. The traffic noise originates from vehicle exhaust and braking systems, devices for giving sound signals, engine operation, or as a result of contact between the wheels and the road. In urban areas, the intensity of traffic noise depends on the speed of the vehicle, the flow of traffic, and the surface on which the vehicles are moving. This study aims to monitor traffic noise using the device Brüel & Kjær 2250 on the territory of the city of Kragujevac at specific locations along the roads and during peak hours. Based on the numerical modeling of traffic noise in the Quantum GIS software (abbr. QGIS), it is possible to identify impacts of noise pollution as well as deviations of real noise values from the permissible noise limits. Serbian law regulates that the highest noise level along city roads can be 65 dB (A). The final results obtained by this research can be used to assess the current state of environmental noise pollution, which can be taken into account in the future process of transport planning in the city of Kragujevac.

49-58
WHEEL OF VEHICLE INCREASED SURVIVABILITY

Authors: Liubov Sladkova

Abstract

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Number of views: 174

The article, based on the analysis of technical solutions of tyres of various kinds, proposes a fundamentally new constructive performance of high-traffic and survivability tires. The design and operation of the bus is described. The proposed design is theoretically and experimentally justified. Based on the experimental studies of the interaction of the pneumatic tyre with the road surface, the process of traction-clutch characteristics of the airwheeled engine with the ground is simulated. Experimental studies of the pneumatic engine allowed to assess its performance on roads of different condition, depending on the mass and changes in pressure in the event of damage to flexible elements of the wheel. The resulting indicators allow to sufficiently assess not only the survivability of the wheel, its geometric characteristics, but also to describe the physical nature of the interaction of the engine with the road surface, and to confirm the results of theoretical studies. Practical recommendations are given to determine the rational parameters of the tyre of the proposed design. The design of the pneumatic wheel will expand the technological capabilities of the base machine and use it more widely in extreme conditions. The provision of high traffic vehicles proposed in the article pneumatic wheels is conditioned by the need: in the transportation of heavy large cargoes with the exception of separate transportation processes and the subsequent assembly of components.

59-70
RELIABILITY AND VIABILITY OF THE VEHICLES IN THE CONTEXT OF THE FUTURE TECHNOLOGY - IOT

Authors: Marian Florin Mitroi

Abstract

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Number of views: 210

The multitude of high performance equipment, as well as modern technologies integrated in the structure of vehicles, have led to an important change in their area of viability. These changes also have effects on maintenance work. Due to sensitivity of the electronic equipment to environmental, temperature and working conditions, it is necessary to adopt effective solutions to protect them and maintain their state of operation. The major challenge among classic vehicles, but also hybrid or electric is the thermal management of this equipments. IoT is a strategic concept for the future of communications between the various functional systems of society, which will adapt and regulate vehicle traffic in relation to the environment. IoT technology will generate certain job opportunities for predictive vehicle maintenance. The research is a subjective, well-documented analysis, based on which some appropriate measures are proposed for the future, regarding the maintenance process of vehicles. In this direction, the preventive nature of actions and the implementation of 5G / 6G technologies at a global level are pursued. Also, the implementation of hardware and software solutions in the structure of vehicles is considered. They aim to adapt the operation of vehicles to the optimal parameters, by applying preventive corrections.