基于主动倾斜式尾翼的车辆气动特性研究

doi:10.19562/j.chinasae.qcgc.2023.03.016

Abstract

Abstract:

In order to improve the handling stability of the vehicle in curve driving， an aerodynamic kit of the active tilting rear wing is designed in this paper. With the active tilting rear wing and front lip added to the existing vehicle， the relationship between the vehicle’s aerodynamic characteristics and the rear wing’s angle of tilting and angle of attack is found through aerodynamic simulation. Based on the fuzzy control algorithm， the control strategy of the rear wing with adjustable angle of tilt and angle of attack is designed， which is optimized through vehicle handling stability simulation. With the active tilting rear wing aerodynamic kit installed on the actual vehicle and the control system coded according to the optimized control strategy， the handling stability test is carried out based on the national standards. The results show that compared with the vehicle equipped with the aerodynamic kit that only have adjustable angle of attack and the vehicle without aerodynamic kit， the stability of the vehicle equipped with active tilting rear wing aerodynamic kit have improved.

Key words: aerodynamics characteristic, active tilting rear wing, fluid simulation, fuzzy control

Yunfei Zha,Xiaoshan Shi,Hao Wu,Minxu Li,Huiqin Chen. Study of Vehicle Aerodynamics Characteristic Based on Active Tilting Rear Wing[J].Automotive Engineering, 2023, 45(3): 489-500.

Figures/Tables 30

References 21

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边界条件	相关设置
空气进口	30 m/s 速度进口
空气出口	平均大气压出口
地面	30 m/s 移动壁面
车轮	45.58 rad/s 旋转壁面
其它	无滑移固定壁面

参数	数值
气动阻力/N	365.67
气动阻力系数	0.30
负升力/N	-142.98

参数	数值
气动阻力/N	565.69
负升力/N	992.36
气动阻力系数	0.45
负升力系数	0.80
前唇气动阻力/N	20.22
前唇负升力/N	507.29
尾翼气动阻力/N	74.52
尾翼负升力/N	638.66

AoT₁		θ_StW
AoT₁		NL	NM	NS	0	PS	PM	PL
s_side	NL	NL	NL	NL	NL	NL	NM	NS
	NM	NL	NL	NM	NM	NM	NS	0
	NS	NL	NM	NS	NS	NS	0	PS
	0	NM	NS	0	0	0	PS	PM
	PS	NS	0	PS	PS	PS	PM	PL
	PM	0	PS	PM	PM	PM	PM	PL
	PL	PS	PM	PL	PL	PL	PL	PL

AoA		Acc_req
AoA		GL	GM	GS	0	BS	BM	BL
s_F&R	FL	NL	NL	NM	NS	0	PS	PS
	FM	NL	NM	NM	NS	0	PS	PM
	FS	NM	NS	NS	0	PS	PM	PL
	0	NS	0	0	0	PS	PM	PL
	RS	0	PS	PS	PS	PM	PM	PL
	RM	PS	PM	PM	PL	PL	PL	PL
	RL	PL	PL	PL	PL	PL	PL	PL

Study of Vehicle Aerodynamics Characteristic Based on Active Tilting Rear Wing

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Figures/Tables 30

References 21

Related Articles 14

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参数	数值
轴距/mm	2 830
前/后轮距/mm	1 512/1 526
车长/mm	4 775
车宽/mm	1 800
车高/mm	1 435
整备质量/kg	1 605
前/后轴荷比	52/48
轮胎规格	225/50 R17
发动机功率/kW	170
驱动形式	前置后驱

仿真编号	横摆角速度/（（°）·s^-1）					转向盘转角/（°）
仿真编号	1	2	3	4	r	1	2	3	4	θ
ATRW	12.24	12.58	12.63	12.69	12.54	58.2	58.10	58.03	57.1	57.86
AA	14.48	14.61	14.65	14.68	14.61	65.45	66.58	65.96	66.68	66.17
Standard	15.92	15.93	15.89	15.91	15.91	69.77	70.17	69.58	69.88	69.85

仿真编号	横摆角速度/（（°）·s^-1）					转向盘转角/（°）
仿真编号	1	2	3	4	r	1	2	3	4	θ
ATRW Opt	12.54	12.66	12.66	12.66	12.63	58.4	58.59	58.4	57.77	58.29

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