汽车传动系扭振激励辨识与减振措施

doi:10.19562/j.chinasae.qcgc.2022.02.014

Abstract

Abstract:

For the modeling and simulation of the torsional vibration of automotive driveline system， an identification method of torsional vibration excitation is proposed in this paper. Firstly， a real vehicle test is conducted to obtain the torsional vibration data of the sample vehicle during acceleration. Then， a 4-DOF nonlinear dynamic model is established for studying and predicting the torsional vibration characteristics of the sample vehicle. Meanwhile， a fitting function of the cylinder pressure curve is put forward， and an estimation of cylinder pressure curve is obtained through parameter identification， so the excitation torque is acquired. Next， a numerical simulation is performed on the model with its results compared with test data， verifying the correctness of the model. Finally， through the adjustment of the stiffness of clutch damper and the half shaft and the installation of an inertia plate on propeller shaft， the natural frequency of the driveline system is shifted beyond the commonly-used speeds， avoiding the resonation of torsional vibration. The results show that the function fitting-based cylinder pressure curve identification method can effectively identify the excitation of the torsional vibration of driveline system with high accuracy， providing theoretical support for the research on driveline torsional vibration.

Key words: automotive driveline system, real vehicle test, torsional vibration, cylinder pressure curve, parameters identification, frequency shift

Junlong Qu,Wenku Shi,Zhiyong Chen. Excitation Identification and Attenuation Measures of Torsional Vibration in Automotive Driveline System[J].Automotive Engineering, 2022, 44(2): 264-271.

Figures/Tables 19

参数	数值	参数	数值
$J 1$ /（kg·m²）	0.713 9	$k 1$ /（N·m·rad^-1）	4 583.7
$J 2$ /（kg·m²）	0.062 9	$k 2$ /（N·m·rad^-1）	1 919.2
$J 3$ /（kg·m²）	0.627 5	$r$ /mm	51
$J 4$ /（kg·m²）	25.108	$l$ /mm	155.5
$C F x$ /N	80 000	$D$ /mm	104
$S x$	0.6	$R$ /m	0.376
$C D$	0.7	$A$ /m²	4.1
$ρ$ /（N·s²·m^-4）	1.225 8	$η j$	0.98
$η c$	0.995	$η r$	0.96
$η g$	1.0	$η o$	0.99

参数	$a 1$	$b 1$	$c 1$	$a 2$	$b 2$	$c 2$	$d$
数值	62.77	17.15	50.59	74.49	9.524	21.55	-0.776 6

References 15

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拟合函数	变量数	拟合精度
拟合函数	变量数	SSE	R_-square	RMSE
8阶傅里叶	18	4 660	0.983 5	1.81
2阶高斯	6	2 321	0.991 8	1.272
8阶多项式	9	1.159×10⁵	0.590 2	8.999

项目	模态频率/Hz
项目	1^st	2^nd	3^rd	4^th
原系统	0	6.34	21.69	52.51
改进后系统	0	5.14	20.98	34.40

Excitation Identification and Attenuation Measures of Torsional Vibration in Automotive Driveline System

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