Effects of the lateral compliance of the suspension on the vehicle-handling responses

Abstract

In the current work the yawing and side-slip motion of a two-mass vehicle is studied. The vehicle is divided into an upper rigid mass and a lower rigid mass pivoted on one another on a vertical axis through the centre of mass. The vehicle body constitutes the upper rigid body, and the suspension axles represent the lower rigid body. A yawing stiffness and damping package is acting between the two rigid bodies. The equations of motion of the two-body yawing vehicle are developed, and the handling behaviour of the vehicle is compared with that of a basic two-degree-of-freedom vehicle-handling model. The steady-state yaw responses of the two systems are equal but the side-slip angles are different. The results show considerable differences in the transient response properties of the two systems. With regard to the stability of motion, at situations where the two-degree-of-freedom model is stable, the three-degree-of-freedom yaw stiff model is also stable.

Investigation of the tyre characteristics under non-steady-state conditions on the basis of road tests

“…The approach to this problem found in the literature is based among others on utilizing the single-track bicycle model that is often applied in modelling the motion of the vehicle. [16][17][18][19][20][21][22] Another issue is modelling the side-slip phenomenon of a tyre. Different solutions to this problem have been discussed by Lu and Guo 23 , who modelled the dynamics of side-slip by defining the properties of the tyre structure.…”

Global-guidance chaotic multi-objective particle swarm optimization method for pneumatic suspension handling and ride quality enhancement on the basis of a thermodynamic model of a full vehicle

“…In recent decades, the behavior of the tire and suspension system of off-road and on-road motor vehicles which may have detrimental impacts on passenger comfort and vehicle handling dynamics has received a large extent of research focus. [1][2][3] New ideas for improving suspension performance and, therefore, improving vehicle dynamics performance have always been of great interest to many researchers. A practical method that has attracted much academic and industrial research focus is the use of air springs, which provide excellent ride comfort.…”