Simulation analysis of multi-axle vehicle braking stability based on all-wheel active steering technology

The three degree-of-freedom three-axle vehicle model based on all-wheel active steering (AWAS) technology was built in this paper. Relative control strategy and control method were proposed using fuzzy self-optimal control theory. The performances of ABS control method, yaw moment control method and AWAS control method were evaluated through simulating and analyzing by means of MATLAB. The results show that the stability of the multi-axle vehicle is not only determined by side-slip angle, yaw rate and distribution of each wheel, but technology which is used. The AWAS controller performs better than those of non-active controller including ABS controller and yaw moment controller. Therefore,the vehicle based on AWAS technology steers and brakes more smoothly. The stability, driving safety and riding comfort of the vehicle are improved significantly.