Rear wheel active steering system, vehicle stability control method and system and medium

The invention relates to the technical field of intelligent chassis and automobile active safety, in particular to a rear wheel active steering system, a vehicle stability control method, a vehicle stability control system and a medium. The actual rear wheel steering angle is obtained through a rack position signal collected by the rack position sensor in real time and a rear wheel steering structure characteristic look-up table, the control system conducts closed-loop feedback control on the motor according to the deviation between the expected rear wheel steering angle and the actual rear wheel steering angle, and the vehicle is made to work in a safe state all the time. According to the rear wheel active steering control method, driving working condition recognition and instability emergency intervention are utilized, the safety problem of high-speed driving of the vehicle is well solved, and the ideal control effect can be achieved on various different road surfaces, different tire pressures and different