基于Adams/Insight的双十字轴万向节转向波动灵敏度分析及优化

Sensitivity Analysis and Optimization of Steering Fluctuation of Double Cross Universal Joint Based on Adams/Insight

十字万向节结构简单,传动可靠,允许两传动轴之间有较大的夹角,因此,汽车转向系统采用十字万向节传递运动。当输入轴和输出轴有夹角的情况下,输入轴与输出轴之间角速度不相同。对于采用万向节传递运动的转向系统,方向盘的输入与轮胎转角的输出存在非线性,影响驾驶品质,合理布置转向节相位角至关重要。基于某款双十字万向节式的转向管柱,分析万向节传动转速波动存在的原因。根据给定参数搭建前悬半车多体动力学模型,并基于Adams/Car和Adams/Insight分析了不同转向节相位差对波动率影响,迭代识别出不同相位角对转向波动的影响贡献度,进一步对万向节叉进行优化,减小输入输出轴转速波动,提高整车转向品质。

The cross universal joint is simple in structure,reliable in transmission,and allows a large included angle between the two transmission shafts.Therefore,the automobile steering system uses the cross universal joint to transmit motion.When there is an angle between the input shaft and the output shaft,the angular velocity between the input shaft and the output shaft is different.For the steering system using universal joint to transmit motion,there is non-linearity between the input of steering wheel and the output of tire angle,which affects the driving quality.It is important to reasonably arrange the steering joint phase angle.Based on a double cross universal joint steering column,the causes of universal joint transmission speed fluctuation are analyzed.The front suspension half car model is built according to the given parameters,and the influence of different steering joint phase difference on the fluctuation is analyzed based on Adams/Car and Adams/Insight.The influence contribution of different phase angle on the steering fluctuation is identified iteratively,and the universal joint fork is further optimized to reduce the input-output shaft speed fluctuation and improve the steering quality of the whole car.