面向转向制动工况的制动力动态分配策略

doi:10.19562/j.chinasae.qcgc.2024.10.004

Abstract

Abstract:

The vehicle dynamics during turning-braking maneuver are more complex than those on the straight lanes due to tire sideslip， load transfer and other factors. In depth investigation of the braking allocation strategy for enhancing the vehicle tracking performance in this maneuver is of great significance for driving safety. In this regard， a dynamic braking allocation strategy within electro-mechanical brake （EMB） is further investigated in this study. Firstly， the 2-DOF-vehicle dynamics model is taken as a reference， and the minimum lateral force requirements for stable driving of the front and rear axles are solved based on the model predictive control （MPC） algorithm. Then， the maximum longitudinal force available for braking each wheel is obtained by solving the friction circle online. Moreover， the braking allocation ratios are calculated according to the obtained maximum longitudinal force to realize the optimal braking allocation， The simulation and test results show that the proposed strategy enhances the vehicle tracking performance in turning-braking by dynamically adjust the braking force allocation ratios according to the driving conditions， load status and road adhesion conditions of the vehicle.

Key words: dynamic braking force allocation, turning braking, electro-mechanical brake, model predictive control, tracking performance

Tong Wu,Jing Rong,Junnian Wang,Wen Sun,Liang Chu,Linhe Ge. Dynamic Braking Allocation Strategy for Turning-Braking Maneuver[J].Automotive Engineering, 2024, 46(10): 1755-1765.

Figures/Tables 14

符号	数值	单位	符号	数值	单位
M	10 080	kg	B₁	2.030	m
m_v	7 690	kg	B₂	1.863	m
h_g	1.300	m	r_r	0.510	m
L	4.490	m	r_b	0.173	m
a	3.102	m	μ_b	0.4
I_z	30 872.4	$k g ? m 2$	J_w	14	$k g ? m 2$

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Dynamic Braking Allocation Strategy for Turning-Braking Maneuver

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