基于特性的商用车全浮式驾驶室动力学模型

doi:10.19562/j.chinasae.qcgc.2023.12.009

Abstract

Abstract:

The driver perceives the vehicle’s motion response while sitting in the cab， and the cab and its suspension mechanism are essential factors affecting the driving sensation of the driver. For real-time simulation of the cab movement， a characteristics-based modelling technical route is adopted in this paper， in which the cab’s movement is decoupled into low-frequency in-plane Motion and high-frequency out-of-plane Ride， comprehensively considering the load-carrying properties， RC/PC properties and K&C properties of the cab suspension mechanism， and a full-floating cab model for the commercial vehicle is established. Finally， the cab model is embedded into the 89DOF truck model to simulate a tractor， and the model’s fidelity is verified by comparing it with the field test results.

Key words: full-floating cab, dynamic model, characteristics-based, driver’s cab suspension, commercial vehicle

Xin Guan,Li Li,Chunguang Duan,Jun Zhan. A Characteristics-Based Dynamic Model of the Full-Floating Cab for the Commercial Vehicle[J].Automotive Engineering, 2023, 45(12): 2272-2279.

Figures/Tables 13

References 26

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驾驶室特性	参数	单位
质量/惯量特性	质量	kg
质量/惯量特性	惯量	kg·m²
几何特性	质心相对于整车的位置	mm
	悬置上点相对于驾驶室的位置	mm
	悬置下点相对于车架的位置	mm
承载特性	刚度特性曲线	kN/mm
承载特性	阻尼特性曲线	N/（m·s^-1）
K&C运动学特性	悬置轮跳—悬置纵向位移	mm-mm
K&C运动学特性	悬置轮跳—悬置侧向位移	mm-mm
RC/PC导向特性	纵倾中心高度	mm
RC/PC导向特性	侧倾中心高度	mm

模块名	数量	自由度
刚性车架	1	横向/纵向/垂向/侧倾/俯仰/横摆
车桥	3	垂向/侧倾/俯仰
车轮	10	旋转/纵向/侧向/横摆
转向系	1	转向器/左转向体旋转/右转向体旋转
传动系	1	曲轴/变速器输入轴/变速器输出轴
制动系	1	无
空气力学	1	无
悬架	2	平衡悬架板簧俯仰
驾驶室	1	垂向/侧倾/俯仰
动力总成	1	横向/纵向/垂向/侧倾/俯仰/横摆
柔性车架	1	17个连接点（驾驶室悬置/动力总成悬置/悬架/ 第五轮）的垂向振动

试验工况	评价指标	场地试验	模型仿真	精度误差
60 km/h角阶跃左、右转向	驾驶室侧倾角稳态值/（°）	-2.672	-2.589	3.21%
60 km/h角阶跃左、右转向	驾驶室侧倾角稳态值/（°）	3.756	3.651	2.88%
80 km/h角阶跃左、右转向	驾驶室侧倾角稳态值/（°）	-2.645	-2.627	0.69%
80 km/h角阶跃左、右转向	驾驶室侧倾角稳态值/（°）	2.900	2.874	0.90%
60 km/h单正弦左转向	驾驶室侧倾角峰值/（°）	-2.999	-2.868	4.57%
60 km/h单正弦左转向	驾驶室侧倾角峰值/（°）	3.785	3.831	1.20%
60 km/h单正弦右转向	驾驶室侧倾角峰值/（°）	3.466	3.485	0.55%
60 km/h单正弦右转向	驾驶室侧倾角峰值/（°）	-2.653	-2.657	0.15%
80 km/h单正弦左转向	驾驶室侧倾角峰值/（°）	-2.590	-2.430	6.58%
80 km/h单正弦左转向	驾驶室侧倾角峰值/（°）	2.891	2.953	2.10%
80 km/h单正弦右转向	驾驶室侧倾角峰值/（°）	2.910	2.855	1.93%
80 km/h单正弦右转向	驾驶室侧倾角峰值/（°）	-2.356	-2.431	3.09%
30 km/h蛇行	平均驾驶室侧倾角峰值/（°）	1.403	1.432	2.03%
30 km/h蛇行	平均驾驶室侧倾角峰值/（°）	-0.501	-0.519	3.47%
70 km/h蛇行	平均驾驶室侧倾角峰值/（°）	3.198	3.222	0.74%
70 km/h蛇行	平均驾驶室侧倾角峰值/（°）	-2.012	-2.163	6.98%
60 km/h中心区	平均驾驶室侧倾角峰值/（°）	3.095	3.083	0.39%
60 km/h中心区	平均驾驶室侧倾角峰值/（°）	-2.103	-2.086	0.81%
80 km/h中心区	平均驾驶室侧倾角峰值/（°）	2.256	2.231	1.12%
80 km/h中心区	平均驾驶室侧倾角峰值/（°）	-1.289	-1.301	0.92%
50 km/h初速度制动到0	驾驶室俯仰角稳态值/（°）	2.141	2.176	1.61%

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A Characteristics-Based Dynamic Model of the Full-Floating Cab for the Commercial Vehicle

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