A Study Of Vehicle Dynamics Stability Control Based On Variable Structure Control

Vehicle dynamic control system is an advanced system at the present time, and it is a great leap based on the development of ABS/TCS technology. At the urgent state, vehicle yaw moment control can handle vehicle's motion, preventing vehicle from sideslip and spin and also help the drivers manipulate vehicle avoiding traffic accident. Its fundamental aim is not only to control vehicle yaw rate but also limit vehicle slip angle in a certain rang, and improve the stability of vehicle.This study designs a slide mode direct yaw moment control with the feedback of the vehicle slip-angle and yaw rate. It uses the differential between actual value and desired value of yaw rate to calculate additional yaw moment acting on vehicle system. To realize the additional yaw moment, we can distribute the moment of left/right wheel. This paper also considers the affection of the wheel slip-ration to the vehicle's yaw motion, which is combined with ABS/ to structure a vehicle dynamic integration control system. The vehicle stability and maneuverability in critical situation are hope to be enhanced. The validity of this control idea is verified on co-simulation platform of ADAMS/Car and MATLAB/Simulink, constructs the model of vehicle in ADAMS/Car and the controller in MATLAB/Simulink, combines them with special interface. Simulations on two representative conditions (step steer and single lane change), proves the validity of this strategy and provides a foundation of theory to design of vehicle dynamics stability control.At last, primary research of the vehicle stability control HILS is carried on based on LabVIEW platform, offers a little reference to maturate experimentation in the future.