摘要
针对电驱动铰接车行驶中出现的"蛇形"失稳等现象,对影响车辆行驶稳定性的因素进行分析。根据铰接车的结构特点,将其简化为三自由度的动力学模型,基于简化的单轨模型,利用拉格朗日方程建立铰接车单轨动力学数学模型。应用ADAMS建立铰接车整车多体动力学仿真模型,正确选择轮胎类型和路面模型,进行整车动力学仿真。获得整车的行驶速度、前后车节质心横摆角速度、铰接角等随时间变化曲线。重点分析不同的质心位置、转向参数、质量、轮胎侧偏刚度、悬架刚度和阻尼等参数对铰接车行驶稳定性的影响。仿真结果表明:质心位置靠近铰接点,增大转向刚度和阻尼,减小轮胎侧偏刚度,增大悬架刚度和阻尼,适当增加后车体质量,有利于提升电驱动铰接车的行驶稳定性。
To the phenomenon that transverse swing when the articulated vehicle run in a high speed along a straight line, then the manipulation stability becomes poor, so analysis of the factors affecting the driving stability of vehicle. According to the structural characteristics of articulated vehicle, this is simplified to three degrees of freedom dynamics model. Dynamic mathematical model of the articulated vehicle was established through Lagrange equation based on the model. The multi-body dynamics simulation model was built by ADAMS, then the models of tire and pavement is chasen. Through the model got change curves with time of vehicle speed, the yaw rate and the angle of the front and rear section. The influence of different center of mass, steering parameters, quality, tire stiffness, suspension stiffness and damping on the stability of articulated vehicle was analyzed. The simulation results show that the centroid position is close to the hinge joint, increasing the steering stiffness and damping, reducing the tire lateral stiffness, increasing the stiffness and damping of the suspension, which are advantageous to improve driving stability of articulated vehicle.
出处
《机械设计与制造》
北大核心
2016年第12期57-60,共4页
Machinery Design & Manufacture
基金
河南省重点学科(2012-186(55))
河南省品牌专业(ZLG201405)
河南省高等学校"专业综合改革试点"项目(2012-859(30))
关键词
铰接车
电驱动
行驶稳定性
质心位置
联合仿真
模型
Articulated Vehicle
Motor-Driven
Stability
Mass Center Position
Co-Simulation
Model
