摘要
通过建立半挂汽车列车的动力学模型,对其进行拉氏变换,求出系统的传递函数;改变半挂汽车列车的使用和结构参数,利用MATLAB编程进行数字仿真,通过系统的传递函数求出其根轨迹;再根据根轨迹变化趋势,判断系统是否稳定及稳定裕度的大小;结果表明:车速、轮胎侧偏刚度、牵引车与挂车的质量、挂车质心到铰接点的距离、牵引车质心到铰接点的距离等参数,对半挂汽车列车操纵稳定性的影响程度不同,选择合理的参数可以提高半挂汽车列车的操纵稳定性。
Through the establishment of dynamic model of tractor-semitrailer,laplace transform is carried out and transfer function of the system is got;then by changing the use of tractor-semitrailer and structural parameters,digital simulation is done by applying MATLAB programming to find the root locus;afterwards according to the variation trend of root locus,the stability of the system and the size of the stability margin is estimated;the results show that：the effect of those parameters such as speed,tire cornering stiffness,the quality of tractor and trailer,the distance between barycentre of the trailer and hinged points differs to the trailer in handling stability,thus the selection of rational parameters can be manipulated to improve the stability of the trailer.
出处
《机械设计与制造》
北大核心
2011年第10期129-131,共3页
Machinery Design & Manufacture
基金
广西自然科学基金资助项目(桂科基0778006-13)
关键词
半挂汽车
根轨迹法
操纵稳定性
仿真
Tractor-semitrailer
Root-locus method
Handling stability
Simulation
