摘要
应用MATLAB对某款轿车进行了汽车振动控制仿真,分析了汽车阻尼对汽车行驶速度控制的影响,得到汽车阻尼有利于汽车当前速度迅速收敛于期望速度。进而对不同阻尼比在同级路面下的车身加速度进行了分析,并绘制了相应的影响曲线。然后将轿车简化为四自由度动力学模型,通过受力分析得到了一般粘性有阻尼多自由度系统的振动方程,且仿真分析了车身垂直振动、俯仰振动、前轴和后轴振动对汽车前后轮激励的频率响应曲线,最后导出了轴距与汽车俯仰振动的关系,为汽车乘坐舒适性的提高提供了相关的理论参考。
The simulation of automobile vibration control is carried out by using MATLAB, analyze the influence of automobile damping on the speed control of automobile. The damping of automobile is beneficial to the rapid convergence of the current speed of automobile. And then the different damping ratios in the same level of road under the body acceleration are analyzed, and the corresponding impact curves are drawn. Then, the car is simplified to the four-degree-of-freedom dynamic model, and the vibration equation of the general viscons damped multi-degree-of-freedom system is obtained by force analysis. And then the frequency response curves of the vertical vibration, pitch vibration, front axle and rear axle vibration are analyzed. Finally, the relationship between wheelbase and pitching vibration of car is derived. It provides a theoretical referenee for the improvement of ride comfort.
出处
《机械设计与制造》
北大核心
2017年第11期56-59,共4页
Machinery Design & Manufacture
基金
陕西省科技厅自然科学基础研究计划项目(2014JM7264)
