车辆稳定性和倾翻测量系统的研发

为了严格按照国家标准对车辆稳定性能进行测试,本文研发出了一种车辆稳定性和倾翻测量系统。系统由硬件软件两大部分组成(共包含五个子系统),能够在不损坏测试设备的前提下进行有关车辆(上方机械、叉车及其它车辆)的稳定性测试和车辆的倾翻测试。系统具有原理清晰可靠、控制方式先进等特点,适用于相关车辆的稳定性和倾翻测试。     

基于正交试验的SUV侧翻性能仿真分析

基于某SUV参数测试数据,运用CARSIM建立整车模型,通过蛇形试验工况进行仿真分析,验证了模型的有效性。在此基础之上,通过鱼钩试验工况,采用正交试验的方法,得到了一个最优方案和车辆的关键参数对反映汽车侧翻稳定性的横向加速度、侧倾角和横摆角速度等评价指标的贡献率,分析这些参数对侧翻稳定性评价指标的贡献率,得到了这些关键参数与侧翻稳定性的关系。这为开发前期对整车侧翻性能的预测提供参考依据。     

Braking hazards of golf cars and low speed vehicles

Research and analysis of braking issues for golf cars and other low speed vehicles (LSVs) are reported in this study. It is shown that many such vehicles only provide braking for their rear wheels, which can lead to a driver losing control during travel on typical steep downgrades. The braking performance of a golf car equipped with brakes on two or four wheels was analyzed to determine the effects of two and four wheel brake designs on braking efficiency and vehicle yaw stability. Besides reducing braking efficiency, it is demonstrated that installing brakes on only the rear wheels can lead to directional instability (fishtailing) and rollover when the rear wheels are braked until skidding occurs. The nonexistence of golf course standards and the inadequacy of golf car and LSV standards are noted and a connection between this and the comparatively high level of accidents with such vehicles is inferred. Based on these results, it is advisable to install brakes on all four wheels of golf cars and LSVs. In addition, new safety standards should be considered to reduce the occurrence of golf car accidents on steep downhill slopes.