Modeling And Simulation Of Vehicle Active Collision Avoidance Control System

With the continuous improvement of the level of science and technology,the automobile industry has been rapid progress in the convenience to mankind also makes the road traffic safety problems become increasingly serious,so the problem of vehicle traffic safety has become the focus of attention of countries around the world,The research on active safety technology of automobile is becoming the focus of automobile safety research.As a part of automobile active safety,active collision avoidance control system can reduce the traffic accident rate,ensure vehicle safety and promote the future.The development of intelligent transportation is of great significance.Based on this,the whole design scheme of the vehicle longitudinal active collision avoidance control system is planned,and the key technologies in the whole design scheme are analyzed and analyzed.The vehicle dynamics model is established by using Carsim software and the inverse dynamic model of vehicle is established by using Matlab/Simulink to obtain the expected braking pressure and the expected throttle opening.Based on the analysis,Then,the vehicle braking process is analyzed and the safety distance model of the collision avoidance control system is established and the safety model of the existing safety system is established.Based on this model,an appropriate safety distance model is established,and the early warning algorithm of the collision avoidance control system is analyzed and studied,which lays the foundation for the research of the vehicle collision avoidance control system.Based on the hierarchical control concept in the overall design scheme and the nonlinear control device which includes vehicle brake and tire parameters in the actual braking process,this paper designs the upper controller based on the single neuron PID control strategy,Then based on the different design of the overall design of the control function designed based on the PID control of the cruise control and constant speed based on the optimal control theory of the host controller,based on the above study by Carsim and Matlab/Simulink software environment to build a joint simulation analysis model.Through the simulation study on different working conditions,the correctness of the function of the collision avoidance control system and the relevant research contents as wellas the rationality of the control system planning and design are verified.The simulation results show that the collision avoidance control system can realize the collision avoidance function of the whole design scheme,which is of great significance to improve the road traffic safety level.