Control strategy of AEB system based on PreScan
LÜ Xiaojiao
LI Fangyuan
XU Yueyun
ZHAO Changli
ZHENG Liuyuan
Abstract：In order to improve the applicability of the automatic emergency braking(AEB)system in severe weather such as rain and fog,a hierarchical warning and braking control strategy based on finite-state machine is proposed.Taking into account the driver's characteristics and vehicle operating status,the time-to-collision(TTC)warning threshold and braking critical safety distance are optimized to improve the driving comfort during the braking process and control the rate of change of braking deceleration.Under the typical working conditions of car-to-car rear stationary(CCRs),car-to-car rear moving(CCRm),and car-to-cyclist longitudinal adult(CBLA-50)proposed in the 2021 version of the China New Car Assessment Program(C-NCAP),a foggy test scenario was constructed to simulate the AEB hierarchical control strategy through software PreScan and MATLAB/Simulink,and compared with the fixed TTC threshold control strategy to verify the feasibility of the AEB hierarchical control strategy.The simulation results show that when the weather conditions are foggy,the success rate of collision avoidance of the fixed TTC threshold control strategy under CCRs,CCRm,and CBLA-50 working conditions is 28.6％,66.7％,and 60.0％,respectively.When the vehicle speed is high,collision avoidance cannot be achieved.The success rate of collision avoidance of the hierarchical control strategy under CCRs,CCRm,and CBLA-50 working conditions is 100.0％,100.0％,and 93.3％,respectively,which effectively avoids collisions while ensuring driving comfort during braking.
Keywords：AEB systemcontrol strategybrakingTTC
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 1-9 )