Developing an active variable-wheelbase system for enhancing the vehicle dynamics

Abstract

In order to enhance the vehicle dynamics, this paper presents a novel and innovative yaw moment control system in which the longitudinal positions of the wheels are individually controlled. For this purpose, the proposed concept is analytically and numerically studied first, and it is shown that the method can considerably modify the inherent characteristics of a vehicle, such as the handling and the steerability. This system can generate a stabilizing yaw moment, without any considerable changes in the total lateral force and the total longitudinal force of the vehicle. Finally, a comprehensive vehicle model together with an intelligent fuzzy control strategy are developed to evaluate the effectiveness of the active variable-wheelbase system in different driving conditions. Based on the simulation results, this system has the potential to be considered as a new alternative technique for vehicle dynamics control in the future.