摘要
建立了车辆两自由度非线性动力学模型及包含悬架刚度立方非线性的运动微分方程,运用Runge-Kutta方法求出了被动悬架与半主动悬架系统对水泥路面、搓板路面、卵石路、鱼鳞坑路4种路谱的响应,采用模拟计算法得出车身竖直振动加速度的均方根值,并将被动悬架与半主动悬架系统的响应进行比较,在振动舒适度改进的同时,悬架弹簧的变形量增大,因此应该合理选择系统参数为汽车的动态设计提供了理论依据.
A two-DOF nonlinear vehicle dynamical model,together with a cubic-nonlinear kinematical differential function for suspension frame stiffness,is initially established.In this fashion,the responses from passive and semi-active suspension frames to four specific roads,i.e.cement,washboard,pebble and fishscale pits roads,are thereafter obtained based on the Runge-Kutta method.By applying simulation computations,the RMS values of perpendicular car-body vibration accelerations are subsequently detected.Meanwhile,a response comparison between passive and semi-passive suspension-frame systems is conducted.Consequently,this approach provides a theoretical basis on dynamic vehicle design through feasible selection of system parameters.
出处
《中国工程机械学报》
2010年第2期143-146,共4页
Chinese Journal of Construction Machinery
基金
国家自然科学基金资助项目(75104412)
关键词
汽车悬架系统
最优控制
非线性
vehicle suspension system
optimal control
nonliearity
