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Research was conducted on vehicle stability control algorithm for four wheel drive (4WD) mini electric vehicle (EV) basing on vehicle dynamics model. The whole vehicle model with eight degrees of freedom was constructed using graphics modeling technology and S-function in MATLAB/Simulink, which includes 4 wheel rotation speeds, front wheel steering angle, vehicle lateral speed, longitudinal motion,...
The vehicle side slip angle is an important matter of vehicle stability control, and it is usually obtained by estimation method today. A hybrid observer is proposed to estimate the vehicle side slip angle in this paper. The hybrid observer includes three parts: a state-space observer, a kinematics integration module and a weight distribution module. The weighting distribution module includes a vehicle...
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...
Using electrical machine in conventional vehicles, also called hybrid vehicles, has become a promising control scheme that enables some manners for fuel economy and driver assist for better stability. In this paper, vehicle stability control, fuel economy and driving/regeneration braking for a 4 WD hybrid vehicle is investigated by using an electrical machine on each non-driven wheels. Fourteen degree...
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