Coordination Stability Control Algorithm with Fuzzy Optimization for Vehicle After Tire Blowout
When a tire burst,the vehicle may lose stability and deviate from its original route,which brings great danger to the driver and vehicle.Differential braking control or active front steering control can improve the vehicle stability to a certain extent and reduce the lateral displacement.In order to further improve the stability of the vehicle after the tire blowout and reduce the damage caused by deviating from the route,differential braking control and active front steering control are combined,and a fuzzy optimization coordination control method is proposed with the fractional-order sliding mode differential braking control and differential forward PID active front steering control.Firstly,the UniTire tire model and Carsim-based vehicle model were built.Then,a fractional-order sliding mode controller was designed to control the yaw moment of the vehicle based on the 2-DOF ideal model,and the stability of the vehicle was ensured by applying braking force to the non-blowout tires.At the same time,a differential forward PID controller was designed to control the front wheel angle,and the lateral displacement of the vehicle was reduced by changing the steering angle of the front wheel.Finally,a fuzzy optimization coordination control algorithm was designed to allocate the weights of the differential braking control and the active front steering control to achieve better control effect.In order to verify the different control algorithms,the simulation experiments for different tire blowout were done with Carsim and Simulink under the condition of straight road.The results show that the yaw velocity and sideslip angle are close to the curve of the vehicle without tire blowout with coordinated control,and the maximum lateral displacement decreases to 0.085 m,and the time to reach the stable state is no more than 1 s.Therefore,the proposed coordinated control algorithm can make the vehicle return to the stable state quickly and reduce the lateral displacement greatly.
tire blowoutvehicle stabilityfraction-order sliding mode controlfuzzy optimizationcoordinated control
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