Research on Vehicle Stability Control Algorithm for Direct Yaw Moment Control

Abstract—A vehicle will usually become unstable while it is turned on a low friction road or in high speeds because the lateral force of the tire reaches the physical limit. A direct yaw moment control (DYC) can control vehicle motion by a yaw moment which is actively generated by transversally distributed tire longitudinal forces, and has become one of the most promising means of chassis control for the improvement of vehicle active safety. The best advantage of the DYC is to greatly improve vehicle handling and stability, and DYC shows the expected robustness when vehicle parameters change, such as tyre cornering stiffness and vehicle mass, even with external disturbances. In this paper, a driver-vehicle closed-loop model of 9 DOFs was built. Two control strategies of DYC were proposed, including forward control and single neural cell PID control. The two control methods were compared by simulation based on the vehicle model. The results show that the single neural cell PID control algorithm was more effective on improving the vehicle handling and stability.