Article

Received 15.11.2022

Revised 07.03.2023

Accepted 30.03.2023

Retrieved from Vol. 27, No. 1, 2023

Pages 219 -228

Poliakov, V., & Razboinikov, О. (2023). Study of the influence of the steering operation of the vehicle when overcoming road bumps on traffic safety. The National Transport University Bulletin, 27(1), 219-228. https://doi.org/10.33744/2308-6645-2023-1-55-219-228

Study of the influence of the steering operation of the vehicle when overcoming road bumps on traffic safety

Volodymyr Poliakov О. Razboinikov

The article presents the results of theoretical studies of the movement of a car that overcomes road irregularities with its left-hand wheels. The movement of the car is considered both with a free steering wheel and with a fixed one. Graphical dependences were obtained, which allow to evaluate the influence of the car's steering on its directional stability when driving on a rough road. An analysis of the influence of the car's steering on the safety of its movement in the specified conditions is given. The object of study – the influence of the car's steering on its course stability when driving on a rough road. The purpose of the work is to reveal the influence of the car's steering operation when overcoming road irregularities on traffic safety by conducting theoretical studies of the directional stability of the car's movement on an uneven road with free and fixed steering wheels. The research method – mathematical modeling. A theoretical study of the directional stability of a car on an uneven road with free and fixed steering wheels was carried out on a mathematical model that takes into account the stiffness of the steering. It was found that the operation of the car's steering significantly affects the safety of its movement on a rough road. Thus, according to the results of theoretical studies, a car with a free steering wheel goes beyond the safety corridor 1.1 s after the start of overcoming a road bump, while with a fixed one – after 2.5 s, which is almost 130% later. This time can play a key role in making a decision and implementing corrective actions in the direction of the car's movement, which increases the chances of avoiding a traffic accident. The deflection of the steered wheels of a car with a locked steering wheel is due to the stiffness or compliance of the car's steering. This phenomenon should be taken into account in the mathematical modeling of the elastic moment in the steering control.

 

road unevenness; steering system; car; course stability; traffic safety
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https://doi.org/10.33744/2308-6645-2023-1-55-219-228