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本文通过力学模型简化分解了汽车越障越壕的过程,以每个过程建立力学平衡方程进行了分析,计算出车辆的越障越壕能力。 相似文献
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针对轿车前悬架系统对车辆操纵稳定性有较大影响,文章利用机械系统动力学分析软件ADAMS建立了带有转向系统的麦弗逊式独立悬架模型,并对其进行仿真分析.通过修改前悬架的定位参数来对其进行优化设计,从而研究悬架参数对车辆操纵稳定性的影响.数值计算表明,优化后的悬架使得前轮定位参数基本达到一个最优值,为改进汽车操纵稳定性提供了参考依据. 相似文献
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阐述了在整车装调过程中确定空车高度的重要性。空车高度是保证前轮定位正确性的前提,前轮定位参数变化量取决于悬架平衡位置,而空车高度对悬架平衡位置有重要影响。以BJl027A皮卡为例,指出对于装有扭杆弹簧的独立悬架车辆,其空车高度不仅影响整车姿态而且影响悬架的运动精度,而正确的空车高度可以保证车辆具有良好的行驶性能。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2008,46(3):155-178
The effect of the increasing number of cosine-form obstacles, which are superposed on a standard homogeneous longitudinal road profile, is studied when the waviness of the basic road profile changes in the range from 1.5 to 3.5. First, the effect of the composed profile on the power spectral density (PSD) is analysed. It appears that the primary PSD in the form of a straight-line in the log-log plot breaks into two straight-line partial segments with quite different waviness values in the long and short wavelength bands. This seems to be a suitable model of a highly deteriorated road. Next, the effect on the response of two typical vehicles, viz. a personal car and a three-axle truck, is studied, and rather different results were obtained. In a summary valuation, it appears that the presence of additional obstacles causes independence of some of the vehicle response quantities of the primary waviness. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(3):155-178
Abstract The effect of the increasing number of cosine-form obstacles, which are superposed on a standard homogeneous longitudinal road profile, is studied when the waviness of the basic road profile changes in the range from 1.5 to 3.5. First, the effect of the composed profile on the power spectral density (PSD) is analysed. It appears that the primary PSD in the form of a straight-line in the log–log plot breaks into two straight-line partial segments with quite different waviness values in the long and short wavelength bands. This seems to be a suitable model of a highly deteriorated road. Next, the effect on the response of two typical vehicles, viz. a personal car and a three-axle truck, is studied, and rather different results were obtained. In a summary valuation, it appears that the presence of additional obstacles causes independence of some of the vehicle response quantities of the primary waviness. 相似文献
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前照灯检测仪是在假定车身位置摆正的前提下进行检测的,实际检测中停车位置往往很难做到没有偏差.影响了检测精度。介绍了基于机器视觉技术的车身位置偏差自动补偿前照灯检测仪的实现方法和检测原理.详细地论述了斜拍校正技术、模式识别技术以及自然光线下高精度实时角度测量技术。 相似文献
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以简化的直背式轿车模型为研究对象,以商用计算流体力学软件STAR-CD为工具,应用不同的湍流模型和离散格式对轿车外流场进行了数值模拟,通过与试验结果的对比,研究了湍流模型和离散格式对直背式轿车外流场数值计算精度的影响,同时对SIMPLE算法及其两种修正方法PISO和SIMPISO算法的计算精度进行了比较。结果表明,高雷诺数Spalart-Allmaras模型和QUICK格式最适合汽车外流场的计算,采用SIMPISO算法的计算精度最高。 相似文献
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通过AVL-Cruise搭建了纯电动城市客车仿真计算模型,结合某车型相关参数,并根据其在中国典型城市公交循环工况下仿真结果[1],计算了电机和后桥主减速器的平均工作效率,分析了不同主减速器传动比对整车能耗的影响。 相似文献
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单向离合器可以单向接合2个部件,单向离合器在分离时能产生超越作用。文章介绍了单向离合器在自动变速器中的作用和用于自动变速器的限制条件,指出具有超越作用的单向离合器,在齿轮变速机构中能够消除降挡冲击,因而在自动变速器中得到应用。使用单向离合器会使汽车失去发动机制动的作用,必要时要取消单向离合器的作用。 相似文献