摘要
针对汽车转向系统和悬架系统的相互作用,建立了转向动力学子模型、悬架动力学子模型以及考虑两者耦合效应的综合动力学模型。通过仿真分析发现:悬架系统主要通过轮胎动载荷引起轮胎侧偏力变化,从而引起转向特性发生显著变化;而转向系统则主要通过离心力影响簧上质量的侧倾运动,从而引起悬架运动特性发生变化;主动悬架与四轮转向协调控制系统在减小车身侧倾和前轮垂直载荷波动的同时,还能有效地改善车辆横摆响应和质心侧偏角响应。
In view of interaction between the steering system and the suspension system of vehicle, two dynamic sub-models for steering and suspension respectively and an integrated dynamic model considering their coupling effect are set up. The results of simulation indicate that the suspension movement causes the variation of tire lateral force through the dynamic load of tire, and hence brings about the great change in steering characteristics; while the steering system induces the rolling movement of sprung mass mainly through centrifugal force, and then leads to the variation in suspension kinematic characteristics. The coordinated control of steering and suspension systems can effectively improve the yaw rate and sideslip responses, while depresses the vehicle＇s rolling and reduces the fluctuation in vertical load of front wheel.
出处
《汽车工程》
EI
CSCD
北大核心
2008年第9期779-783,757,共6页
Automotive Engineering
基金
重庆市自然科学基金项目(8718)资助
关键词
汽车
主动悬架
四轮转向
耦合
协调控制
vehicle
active suspension
four wheel steering
coupling
coordinated control
