The Effect of the Wheel Rotation Angle on the Braking Efficiency of the Tractor Semi-trailer on the Wet Roundabout Route

Abstract

AbstractThe paper presents how to set up a 3D dynamic model to study the effect of the wheel rotation angle on the braking efficiency of the tractor semi-trailer on the wet roundabout route. The method of structural separation of a multi-object system was used to set up a 3D dynamic model, and the method of the Newton-Euler equation system was used to establish the dynamic equation system of the tractor semi-trailer. The Matlab-Simulink software was used to examine the effect of the wheel rotation angle on the braking efficiency of the tractor semi-trailer on the wet roundabout route. The results showed that, when the wheel rotation angle was δ = 3o, the longitudinal acceleration of the tractor and semi-trailer was about 3.2[m/s2], the deviation angle between the tractor and the semi-trailer ψK = 9o, the tractor semi-trailer works stably and safely; when the rotation angle wheel was δ = 5o, the longitudinal acceleration of the tractor was about 3.8[m/s2], the longitudinal acceleration of the semi-trailer was about 3.2[m/s2], the deviation angle between the tractor and the semi-trailer was ψK = 70o, the tractor semi-trailer was oversteered with an unstable movement.KeywordsTractor semi-trailerBraking efficiencyWet roundabout route