Research On Test Method Of Misuse Of Autonomous Emergency Braking System

Nowadays,the number of road traffic accident deaths in the world is still rising,and the number in China has also been at a high level.The development of active vehicle safety is of great help to mitigate road traffic accident injuries.The advanced driving assistance system,represented by the autonomous emergency braking system(AEB),can avoid or mitigate the collision injury.However,due to the complexity of road traffic environment,error of sensor identification,algorithm instability and other reasons,AEB system will misuse.The wrong alarm or braking will not only cause the dissatisfaction of the driver,but also may increase the risk of collision rather than avoid accidents.At present,the test of AEB system is mainly focused on the effectiveness test,while the misuse test is relatively less.For AEB system misuse caused by metal gap,iron plate and other fixings,it should be avoided firstly.For the gradually emerging AEB pedestrian system,sensors are more difficult for pedestrian identification and classification,and the road traffic status in China is complex,which undoubtedly puts forward higher requirements for the AEB system.Therefore,it is of great practical significance to study the two types of misuse of AEB system,i.e.fixation and pedestrian.Firstly,based on the real road traffic accident data,this paper uses the functional decomposition method to study the AEB system misuse scenario,and use Pre Scan simulation analysis and real vehicle test to carry out the AEB system misuse test.The research contents are as follows:(1)Based on the National Automobile Accident In-Depth Investigation System(NAIS)accident data from 2013 to 2018,220 cases of human accident were screened,and the characteristics of the accident cases were analyzed from four aspects: the overall information of the accident,the accident vehicle,the accident pedestrian and the accident environment.The typical scenario of AEB pedestrian system suitable for China were obtained through cluster analysis and chi-square test.(2)The AEB system is divided into six layers by the method of functional decomposition.The human-vehicle collision avoidance model is deduced and established.Based on the characteristics of sensors,the human-vehicle collision avoidance model and the actual road traffic status in China,and in combination with the standard regulations and test procedures,AEB system misuse test scenarios are obtained.(3)According to the misuse test scenarios,by building the basic scenario through Pre Scan,adding vehicle sensors,adding the control model in combination with Matlab/Simulink,the simulation test of AEB system misuse is designed,and the scenarios and reasons of the misue of AEB system are obtained through the simulation test.(4)The basic conditions,test equipment and test process of AEB system field test are determined.At the same time,the real vehicle field test of AEB system is carried out,and the reliability of the test platform is verified by comparing the test process and results with simulation analysis.This paper uses functional decomposition to get AEB system misuse scenarios for testing,which can eliminate redundant test scenarios,reduce the complexity of misuse scenario analysis,improve the systematization and pertinence of scenario analysis,reduce the workload of simulation and real vehicle test,and has high engineering practical value.