The Initial Research And Simulation For Vehicle Collision Avoidance Based On Stability Control

Only collision avoidance strategy and avoidance path optimization was be considered in the Intelligent Vehicle's Collision Avoidance System and some Auxiliary Safe Driving System. but it's not enough. In order to give the vehicle more effective security control, this article is going to add the stability control In the collision avoidance process and establish two subsystems for stability control and collision avoid. The combined control system can provide effective stability control if the vehicle lose its stability during collision avoidance process. It also can prevent the vehicle from a more dangerous situation. Establish a model in ADAMS and do some simulations combined with MATLAB in the latter part of the article. The results indicated that combined control system can avoid the collision on the one hand and it also can provide effective stability control during the steering and braking process. More importantly it increases the effect of collision avoidance indirectly.First, give a simple exposition of current status and development for vehicle's active safety technology and stability control technology. Next design the structure and programs of collision avoidance subsystem and stability control subsystem. Establish a more reliable tire and vehicle body dynamics model based on Newtonian mechanics. And have some necessary simulation in order to verify the accuracy of the model. This model provides reliable reference and verification platform for the controller's design.After the study of the collision avoidance control method and the simplification of the environment, the paper designs the controller of collision avoidance based on finite state machine theory. Calculate the time of collision avoidance and design the conditions of control signal trigger. In the Stateflow toolbox set different priorities to achieve collision avoidance logic for action selection.Stability control will be divided into two parts. The first step is to judge the stability of vehicle. And then use active steering technology and differential braking &additional yaw moment technology to improve vehicle stability during braking and steering. Simulation results indicate the feasibility and effectiveness of the controller.In the finality, the results are summarized and some precious proposals are put forward to follow-up study.