Research On Modeling And Control Strategy Simulation Of Vehicle Collision Avoidance System

As the level of science and technology in China continues to move to a new level,the automobile industry has also shown a spurt of development.While giving people great travel convenience,the automobile also brings very serious traffic safety problems.According to statistics,about 500,000 people die every year due to vehicle accidents around the world,how to reduce or even eliminate the occurrence of traffic accidents has been the focus of automobile manufacturers and related high research,where active safety technology is gradually replacing the traditional passive safety technology to meet people’s needs for absolute driving safety,collision warning and automatic emergency braking as representatives of the field of automotive active safety is getting more and more extensive Collision warning and automatic emergency braking,as representatives of the field of automotive active safety,are being studied more and more extensively,and are of great significance in reducing traffic accident rates,improving road utilization efficiency,and reducing social property losses.In this paper,based on many studies on vehicle active collision avoidance system,the overall plan of the collision avoidance control system is planned firstly.distance model.The vehicle dynamics model is established in Carsim and the inverse vehicle dynamics model is established in Simulink,and the controller adopts a hierarchical control design according to the requirements of the overall design plan for the functions of the collision avoidance system,in which the lower controller adopts fuzzy control,which is more adaptable than the general simple PID control and can realize the relevant parameters in real time.online adjustment.For the trong nonlinearity of vehicle engine model and tire model,the lower controller is selected based on the optimal control theory,and the upper controller calculates the desired acceleration through the real-time acquired driving information,and then the lower controller controls the vehicle acceleration.The common driving conditions such as constant speed cruise,emergency collision avoidance and distance keeping are jointly simulated by Carsim and Simulink,and the safety and comfort of various simulated conditions are also briefly evaluated.The simulation experiment results show that the designed longitudinal collision avoidance system can realize the functions of cruise control,emergency braking and distance keeping,which has certain significance in reducing driver fatigue and improving road traffic efficiency.To further improve the practicability of the collision avoidance system.Due to the limitations of conditions and practice,this paper does not conduct further real vehicle tests to verify the effect of the control strategy of the collision avoidance system,which needs to be further improved and perfected.