Research On Vehicle Lateral Stability Control Based On The Driver Model

The aim of the dissertation is to study the vehicle's lateral stability control based on the driver model, the following issues are discussed: the establishing of whole vehicle model, the designing of vehicle lateral stability control system, the establishing of driver model and the simulating of the driver-vehicle-road close-loop system based on the driver model and so on.Firstly, a whole vehicle dynamics model is established. The vehicle model with four non-line magic formula tire model is established and testified through MATLAB/Simulink based on some assumptions and simplifications of the vehicle system for the need of vehicle handing stability study.A vehicle lateral stability controlling system is established with the yaw rate and side slip angle as the controlling variables. The vehicle lateral stability yaw rate controlling system and vehicle lateral stability side slip controlling system are established based on the fuzzy logic theory. Through analysis of the simulated results for each control system, a combined vehicle stability control system through the yaw rate and side slip is in turn established with the side slip angle as the weighting coefficient, the simulation results show good performance of the controlling system.According to the characteristics of PID control and fuzzy control, a driver model of steering direction control for automobiles is established based on the preview optimal curvature model. The simulating results show good direction control capability of the driver model.Finally, the driver-vehicle-road close-loop system is simulated with the pylon course slalom test. The effectiveness of the vehicle stability control system is evaluated, the evaluating results show good stability control performance of the system.