Research On Vehicle Safety Running Control

The safe operation of automobiles is closely related to the traction and braking performance of automobiles.The purpose of the research on vehicle safety operation control is to improve the braking safety performance,such as shortening the braking distance,shortening the braking time and improving the vehicle stability.In the safe operation of many automobiles,the basic parameters of automobiles,engine parameters and brake parameters are used to study the operation of automobiles.The information acquisition and control of speed signal,acceleration signal,angular speed signal,position signal and overtaking lane change are analyzed.In order to improve the response speed,shorten the braking time,shorten the braking distance of the automobile braking system,and study the safe running of many automobiles,the specific work is as follows:(1)Firstly,this paper analyses and compares the two control methods of the traction control of automobile,which are the fuzzy-PID controller and the PID controller.When the initial slip rate is the same and the braking moment is the same,the designed fuzzy-PID controller has better control effect than the PID controller.The speed of the fuzzy-PID controller is faster,and the braking time and braking distance can be shortened.(2)Aiming at the problem of asynchronous control of automobile braking,a control method to solve the problem of asynchronous control is given.According to the modular design,a complete automobile operation model is established.According to the change law of slip degree and torque of front and rear wheel speed change with time,a real-time monitoring system for the change of vehicle operation speed with time is established.(3)The braking speed signal,angular velocity signal,ground adhesion signal and braking force signal are analyzed and processed by using the modeling method.Based on the relationship between the braking force distribution of front and rear wheels and the vehicle load,the differential equation of braking force of vehicle is established.Starting from the analysis method of ground adhesion coefficient,combined with the relationship function of ground adhesion coefficient and slip rate,the simulation results show that the braking time and braking distance are shortened.(4)According to the different characteristics of icing pavement,dry concrete pavement and wet asphalt pavement,based on different pavement classification and the functional relationship between ground adhesion coefficient and slip rate,the fuzzy control model of automobile is improved.The simulation results show that the braking efficiency of the three road conditions has been improved,the braking time has been shortened by 10-20%,the braking distance has been shortened by 5.6-25%,and the control effect has been improved.(5)Using the method of electrical simulation,the double closed-loop(current loop ACR,speed loop ASR)fuzzy PID control scheme is improved,and the response speed of automobile brake system is improved by speed conversion ASR fuzzy self-tuning PID control.(6)Research on the control of the safe operation of many vehicles.Firstly,aiming at the problem of precise positioning,a precise positioning system based on Aduino is designed to realize the precise positioning system of the vehicle in the moving path and position information.Then,aiming at the problem of keeping safe distance and avoiding obstacles between vehicles and vehicles,the PanoSim platform is used to establish the simulation platform for safe operation experiment of three vehicles,and the dynamic real-time observation system for lane change,obstacle avoidance and location of three vehicles is realized.In a word,the research on vehicle safety operation control in this paper has certain theoretical and practical significance for practice.