Fuzzy logic applied to yaw moment control for vehicle stability

A yaw moment control based on fuzzy logic is proposed to deal with high nonlinearity in vehicle dynamic systems. The developed controller generates the suitable additional yaw moment which is obtained from the differential longitudinal braking forces in driving wheels so that the vehicle follows the target values of the yaw rate and the sideslip angle. A two-degree-of-freedom vehicle dynamic is derived on the base of Magic Formula duo to H.B. Pacejka and a sideslip angle observer is also constructed. Finally, simulation is conducted to validate the performance of the fuzzy logic controller on Matlab/Simulink. The results show that designed controller can greatly improve the vehicle stability especially under limit cornering maneuver.