Effects of the lateral compliance of the suspension on the vehicle-handling responses. (April 2015)

• Record Type: Journal Article
• Authors: Mashadi, Behrooz; Mostaghimi, Hamid
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 229:Number 5(2015:May)
• Page Start: 641
• Page End: 655
• Publication Date: 2015-04
• Subjects: Suspension -- compliance -- yaw stiffness -- upper mass -- lower mass -- handling -- modeling -- frequency -- damping; Mechanical engineering -- Congresses; Transportation engineering -- Congresses; 629.2
• DOI: 10.1177/0954407014547926
• Languages: English
• ISSNs: 0954-4070

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.