基于滑模理论的高速车辆侧风稳定性控制研究

doi:10.19562/j.chinasae.qcgc.2022.01.015

Abstract

Abstract:

For crosswind stability of high-speed vehicles， a two-way coupling platform of multi-body dynamics （MBD） and computational fluid dynamics （CFD） is built， and a crosswind stability control system is designed based on the platform. Based on the sliding mode theory， the upper controller calculates the additional yaw moment required for the stability of high-speed vehicle under crosswind disturbance， and the lower controller distributes the yaw moment to each wheel， so as to complete the anti-crosswind control of the vehicle. The kinematic and aerodynamic characteristics of uncontrolled vehicle and direct yaw-moment control （DYC） vehicle under step crosswind are analyzed. The results show that the maximum yaw angle of the uncontrolled vehicle is 5.7° and the maximum lateral displacement is 4.0m in the step crosswind. After DYC is applied， the yaw angle of the vehicle is basically 0 and the maximum lateral displacement is 0.41m， with the vehicle maintaining the straight driving state well. It shows that the crosswind interference resistance of high-speed vehicles is improved effectively under the crosswind stability control system.

Key words: crosswind stability, dynamic two-way coupling, sliding mode theory, direct yaw-moment

Baoyu Liang,Yiping Wang,Xun Liu,Qianwen Zhang,Jianbo Xiong,Xingjun Hu,Jingyu Wang. Study on Crosswind Stability Control of High-speed Vehicle Based on Sliding Mode Theory[J].Automotive Engineering, 2022, 44(1): 123-130.

Figures/Tables 14

参数	数值
整车整备质量/kg	1 792
前轮轮距/m	1.525
后轮轮距/m	1.530
整车轴距/m	2.82
质心高度/m	0.538
质心到前轴距离/m	1.227
绕x轴转动惯量/（kg·m²）	901
绕y轴转动惯量/（kg·m²）	5 910
绕z轴转动惯量/（kg·m²）	5 584
前悬刚度/（N·m）	24 000
后悬刚度/（N·m）	24 570
前悬阻尼/（ $N ? s ? m - 1$ ）	3 918
后悬阻尼/（ $N ? s ? m - 1$ ）	4 310

需求横摆力矩方向	依据	控制策略
向左	$T x f l ≤ 800 ? N · m$	$T x f l$
向左	$T x f l > 800 ? N · m$	$T x f l = 800 ? N · m, T x r l$
向右	$T z r r ≤ 600 ? N · m$	$T r r$
向右	$T x r r > 600 ? N · m$	$T x r r = 600 ? N · m, T x f r$

References 9

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Study on Crosswind Stability Control of High-speed Vehicle Based on Sliding Mode Theory

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