Research On Intersection Steering Obstacle Avoidance Control Based On AEB System

In order to solve the problem that the AEB system cannot judge the driver’s correct intention through the steering Angle sensor when the vehicle turns at the intersection,it is easy to cause false braking due to AEB’s work.Based on the current AEB system control theory,this paper establishes an algorithm aiming at the driver’s driving intention when turning at intersection.Based on the above ideas,a fuzzy control algorithm is obtained.At the same time,a vehicle dynamics simulation model is constructed,and the parameters of simulation results were analyzed by CarSim and Simulink to verify the feasibility of the fuzzy control algorithm designed in this paper in improving AEB system intersection driving intention control.Because the AEB system is working and the vehicle is turning at the intersection,the AEB system cannot judge the driver’s correct intention by the steering Angle sensor,in this case,it is easy to produce false braking due to AEB’s work.In order to solve the problem that the AEB system cannot judge the driver’s correct intention through the steering Angle sensor when the vehicle turns at the intersection,it is easy to cause false braking due to AEB’s work.In this paper,based on the theory of the traditional AEB control system,an algorithm aiming at the driver’s driving intention when turning at the intersection is established,so as to solve the problem that the vehicle turns at the intersection,encounters the pedestrian in front of it,and the driver is prone to the wrong braking during obstacle avoidance.Based on the above ideas,a fuzzy control algorithm is obtained.At the same time,a vehicle dynamics simulation model is constructed,and the parameters of simulation results were analyzed through CarSim and Simulink simulation cooperation,which verified the feasibility of the fuzzy control algorithm designed in this paper in improving AEB system intersection driving intention control.The main research of this paper is described in the following content:(1)firstly,the background research on AEB system development is carried out.Aiming at the control methods of existing AEB system,the control of AEB system is proposed to be fuzzy.This paper explores the development of AEB system at home and abroad,the advantages and disadvantages of current AEB system are studied in detail,and defines the significance of designing a new AEB system.(2)investigate and study the existing AEB test standard,set the parameters of vehicle pavement pedestrian,establish the vehicle pavement pedestrian model with CarSim,determine the vehicle dynamic parameters,the corresponding coefficient of friction of the road,for the CarSim and Simulink co-simulation foundation.(3)study the existing Camera ranging method,establish the Camera module of the vehicle,calculate the distance of the target in front of the vehicle through the Camera algorithm,and lay a foundation for the later AEB system design.(4)taking the AEB system’s turning condition at the intersection as the research core,the algorithm design and simulation research were carried out on the AEB system.The dynamic principle of vehicle is expounded to determine the basic collision model and construct the basic AEB control system.The parameters of the steering wheel Angle and the transverse safe distance of vehicles were studied,the fuzzy control module of AEB system was determined,and a fuzzy control algorithm is obtained.The control model of AEB system was built in Simulink software,and the vehicle model and pedestrian model were simulated.(5)The pressure of brake master cylinder is analyzed in detail.The dynamic model of the vehicle determined on the basis of the foregoing;The control principle of AEB system is determined.From what’s been studied the vehicle freedom model,the AEB system is explored to determine which factors are mainly related to the driver’s intention when steering.The AEB system under different steering conditions was analyzed.Aiming at the common defect that the AEB system cannot correctly judge the driver’s driving intention during vehicle steering,a new AEB system is designed to meet the control requirements during steering.Through the dynamics,the control conditions of its operation are explored.(6)the AEB system was co-simulated by CarSim and Simulink to explore the influence of different steering angles and pedestrian positions on the braking pressure of the master cylinder.(7)the feasibility of ranging algorithm and AEB system control function is verified by semi-physical simulation.