Modeling And Simulation Analysis Of Vehicle-Vehicle Cooperative Active Collision Avoidance System

With the rapid development of intelligent transportation,vehicle active safety has always been a research hotspot in the field of automobile safety.When encountering dangerous situations,vehicles use braking or steering to change lanes to solve vehicle collision problems.Effectively improve the active safety of the vehicle.Based on this,this paper studies the vehicle-column active collaborative collision avoidance control strategy that combines longitudinal braking and steering in high-speed emergency driving conditions under the condition of workshop communication.In this paper,the vehicle safety distance model,vehicle dynamics system modeling,vehicle collision avoidance strategy and vehicle brake steering controller design are mainly studied.Based on the analysis of the longitudinal braking process,the vehicle-to-vehicle communication is used to obtain the information of the front vehicle,and the three typical driving conditions of the front vehicle stationary,front vehicle deceleration,front vehicle acceleration,and the comprehensive characteristics of the driver are established to improve the longitudinal braking of the vehicle.Safety distance model;Combined with the minimum longitudinal lane change distance,establish a reference path based on fifth-order polynomials and a lane change safety distance model,and analyze the safety of the vehicle and the sidecar obstacle cars in different conditions;use dynamic simulation The software CarSim establishes the longitudinal and lateral dynamics system model,and uses Matlab/Simulink software to establish the longitudinal and lateral inverse dynamics model of the vehicle.Based on the safety distance model,the vehicle active collision avoidance control strategy is studied,and a hierarchical model is designed.Longitudinal controller,establishes sliding mode control cooperative upper controller,longitudinal braking upper controller,establishes single neuron PID lower controller,realizes collision avoidance of two vehicles through the distribution of acceleration in the workshop,and designs an emergency based on fuzzy PID The steering controller controls the lane change of the vehicle by controlling the steering wheel angle.In order to verify the effectiveness and accuracy of the designed vehicle-vehicle collaborative active collision avoidance system,this paper combines the vehicle model established in CarSim and the control model designed in Simulink to achieve joint simulation experiments and analysis.The experimental simulation results show that the vehicle-to-vehicle active collision avoidance control system designed in this paper can realize the emergency collision avoidance function when the vehicle is in an emergency situation,and can avoid collision in the high-speed emergency situation through the longitudinal collaborative collision avoidance of the workshop The occurrence of a vehicle collision;the steering collision avoidance control system can control the vehicle to complete the tracking control of the desired lane change path at high speeds,and can achieve the coordinated control of the vehicle’s vertical and horizontal directions under high-speed emergency conditions to ensure the safety of the vehicle.FFinally,it summarizes the work and innovations done in the full text,points out the problems and looks forward to future work.