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International Journal of Automotive Technology > Volume 23(6); 2022 > Article
International Journal of Automotive Technology 2022;23(6): 1593-1608.
doi: https://doi.org/10.1007/s12239-022-0139-2
Feng Yang 1, Xin Chen 1,2, Dong Guo 3, Mingmao Hu 1, Ziwen Liao 1, Zhongcheng Fu 1, Qingshan Gong 1
1School of Mechanical Engineering, Hubei University of Automotive Technology
2Chery Commercial Vehicle Co.
3Ministry of Education Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Chongqing University of Technology
PDF Links Corresponding Author.  Mingmao Hu  , Email. hu@huat.edu.cn
An anti-lock control strategy for electric-hydraulic compound braking is proposed to improve the emergency braking safety of a hub motor electric vehicle. Based on the half-vehicle braking longitudinal dynamics model, the optimal control is solved to obtain the total braking torque corresponding to each wheel. A fuzzy algorithm is used to determine the proportion coefficient of the motor based on the battery state of charge coefficient (SOC) and the motor speed constraints on the motor braking, and the total braking torque is distributed. The hydraulic and motor braking torques obtained from the allocation are input as reference values to the electric-hydraulic compound braking system, and the output braking torque is fed back into the CarSim vehicle model. The proposed electric-hydraulic compound ABS control strategy is also validated in the co-simulation of CarSim and MATLAB/Simulink on high, medium and low adhesion road surfaces.
Key Words: Wheel motors, Electric-hydraulic ABS, Optimal control, Brake torque distribution, Fuzzy control
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