Ferdowsi University of Mashhad
In this paper a robust controller based on quantitative feedback theory is designed to improve the stability of a four wheel vehicle using direct yaw moment controller. The essential yaw moment is calculated by this robust and applied to the vehicle dynamics model. Quantitative feedback theory controller design is based on a linear model which is assumed as a simple linear handling model, moreover, simulations are carried out based on nonlinear handling dynamics. The results show that the robust controller could overcome the system uncertainties and control the vehicle in various handling maneuvers.