Article

Received 04.09.2021

Revised 07.01.2022

Accepted 15.02.2022

Retrieved from Vol. 26, No. 1, 2022

Pages 181 -192

Demianiuk, V. (2022). Analysis of the process of braking of wheeled vehicles in the conditions of onboard inequality of braking moments. The National Transport University Bulletin, 26(1), 181-192. https://doi.org/10.33744/2308-6645-2022-1-51-181-192

Analysis of the process of braking of wheeled vehicles in the conditions of onboard inequality of braking moments

V. Demianiuk

The article is devoted to the study of the dynamics of curvilinear motion and course stability of wheeled vehicles during braking in conditions of onboard uneven braking torques. The object of the study – wheeled vehicle, the braking of which is investigated on dry, wet and slippery roads. The purpose of the work is to develop methods of modeling and analysis of the braking process of the wheeled vehicle in the conditions of onboard inequality of braking moments. Research method – mathematical and computer modeling of a dynamic system. A mathematical model is proposed, which allows to investigate the occurrence of curvilinear motion (skid) of wheeled vehicle during braking and to analyze how the inequality of braking moments on the left and right wheels of wheeled vehicle affects the parameters of its movement. During braking, significant longitudinal and transverse reactions occur in the contact of the wheels with the road, which cause significant slippage of the wheels in the appropriate directions. Therefore, when determining the transverse reaction that occurs in the contact of wheels with the road, preference in the mathematical model is given not to the classical theory of wheel deflection, but to the concept of the common nature and identical patterns of interaction of the wheel with the road in both longitudinal and transverse directions. Within the framework of the mentioned concept, quantitative research has clarified the physical processes that occur when the brake wheel interacts with the road. The article investigates the influence of the onboard inequality of braking moments on the course angle during braking of a wheeled vehicle. Studies have identified the causes of the variable by the sign and the oscillating nature of the change in time of the course angle of the vehicle during braking, which complicates the driver to carry out the driving process. The results obtained in the article actualize before the designers of wheeled vehicles the question of increasing the stability of the characteristics of the brake mechanisms and the widespread use of automatic gap regulators in the friction pairs of brakes. Predictive assumptions about the development of the object of study – the development of databases to clarify the regulatory documents on the allowable values of on-board inequality of braking torques for different categories of wheeled vehicles.

 

wheeled vehicles; braking process; mathematical model; computer simulation; course stability
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https://doi.org/10.33744/2308-6645-2022-1-51-181-192