Car Following Model Research Based On Key Physical Characteristics Of Vehicles

With the rapid development of China’s economy,the number of vehicles is increasing year by year.This has caused and aggravated problems such as urban road traffic problems.The establishment of traffic model can analyze the impact of various behavior mechanisms in traffic flow on the normative environment,and car following model is an important method to study the phenomenon of traffic flow.At the same time,in the context of carbon neutrality,vehicle to grid technology,as a new distributed energy storage mode and energy management method,has attracted extensive attention,which also provides a new idea and direction for the application of car following model.Based on the existing car following model and the influence of driving resistance and battery capacity decline,this paper proposes a car following model considering the key physical characteristics of vehicles,simulates and analyzes the conditions of queue vehicles and power batteries,and proposes a new application method combined with car following model and V2 G technology.The specific research work of this paper is as follows:(1)This paper introduces the car following model,V2 G technology,and the concept,classification and research status of power battery under the background of V2 G.(2)Based on the neural network model,considering the influence of vehicle driving resistance,an improved car following model based on vehicle driving resistance is constructed,which makes the model more comprehensively reflect the state of vehicle following.(3)Through the stability analysis of the established car following model,it can be concluded that with the increase of the degree coefficient u value considering the physical characteristics of vehicle driving,the corresponding stability region will expand.It shows that the stability of the traffic flow corresponding to the model will be enhanced when the driving resistance of vehicles is considered more.After that,the velocity of the vehicle queue under four simple and complex conditions is simulated and calculated.The results show that the vehicle speed at the end of the queue is more stable.(4)This paper introduces the battery discharge,circulating current and battery voltage of vehicle queue under four simple working conditions based on the car following model of driving resistance,and further obtains the spatio-temporal distribution of battery capacity decline,and analyzes the battery condition of vehicle queue under complex working conditions.The results show that the vehicle queue can obtain more stable circulating current,battery voltage and battery discharge when the degree of vehicle driving resistance is higher.When the driving scenarios are consistent,the energy consumption of vehicles at the end of the queue is lower,the degree of battery capacity decline is smaller,and the battery state is better.(5)A secondary improved car following model considering battery capacity degradation is established.The simulation results show that the overall driving speed,battery discharge and battery capacity degradation of the vehicle queue are better.Finally,the reference significance of car following model for V2 G system application is introduced.