论文部分内容阅读
为了评价越野车辆的地形通过性,建立了基于虚拟试验场技术的评价系统。基于轮胎内压和轮胎刚度与有效接地面积基本成线性的关系,用试验系数对建立的轮胎粘弹性有限元模型进行了修正。研究了悬架的刚度-阻尼模型,并以多体动力学理论建立了车辆的6自由度动力学模型。以车轮六分力传感器和机器视觉测量方法建立了评价仿真模型的标定和验证硬件平台,并对实车试验与评价系统的仿真结果进行对比。对比结果表明:仿真与试验结果的干涉误差在5%以内,因此,评价系统可信。
In order to evaluate the terrain passing ability of off-road vehicles, an evaluation system based on virtual test site technology was established. Based on the linear relationship between tire internal pressure and tire stiffness and effective ground contact area, the established viscoelastic finite element model of tire was modified with test coefficients. The stiffness-damping model of the suspension is studied, and the 6-DOF dynamic model of the vehicle is established based on multi-body dynamics theory. A hardware platform for calibration and verification of the simulation model was set up with six-component wheel force sensor and machine vision measurement method. The simulation results of the actual vehicle test and evaluation system were compared. The comparison results show that the interference error between simulation and test results is within 5%, therefore, the evaluation system is credible.