计及导向摆臂约束的重型货车驾驶室俯仰平面动力学模型

Pitching⁃Plane Dynamics Model of Heavy Truck Cab Considering Constraints of Guiding Swing Arm

传统的重型货车驾驶室俯仰平面动力学模型没有考虑悬置导向机构的影响,仅能粗略计算驾驶室垂向和俯仰响应,无法计算驾驶室质心的纵向振动特性,因而其仿真精度较低,且在实际工程应用中受到了限制。为提高模型精度并拓宽其工程应用范围,创建了考虑导向摆臂约束作用的驾驶室俯仰平面动力学模型,分析了摆臂导向机构的约束特性。在此基础上,通过道路试验,对所建模型进行了验证。结果表明,所建模型的仿真精度更高,工程应用范围更广,它能有效复现驾驶室系统的真实动力学响应。而且,该模型不仅可用于驾驶室垂向、俯仰和纵向振动响应特性的分析,还可用于考虑驾驶室纵向振动舒适性的悬置控制策略的开发,以及导向摆臂摆角、减振器摆角和驾驶室悬置系统其它动力学参数的估计等。

The traditional cab pitching-plane dynamics model doesn t consider the effects of swing arm guiding mechanism in cab mount,and can only roughly calculate the cabs vertical and pitching responses,but can t analyze its longitudinal vibration characteristics,thus its accuracy is relatively low with limited real engineering application. To enhance the model accuracy and widen its application scope,a cab pitching-plane dynamics model considering the constraint of guiding swing arm is established,and the constraint characteristics of swing arm guiding mechanism are analyzed. On this basis,the dynamics model constructed is verified by road test. The results show that the model constructed has higher accuracy and wider engineering application range,it can more effectively reproduce the real dynamic responses of cab system. Furthermore,the model can be used not only for the analysis of the cabs vertical,pitching,and longitudinal vibration characteristics,but also for the development of the cab mount control strategies considering the cabs longitudinal vibration comfort,as well as for the estimation of the swing angles of guiding arm and shock absorber,and other dynamics parameters of the cab mount system etc.