半主动空气悬架减振支柱机理与建模研究

Study on the Mechanism and Modeling of Semi-Active Air Suspension Strut

半主动空气悬架可根据行驶工况调节悬架参数,提高车辆的综合性能。通过解剖某型半主动空气悬架减振支柱,了解其内部结构与阻尼调节原理。利用台架试验获得了该减振支柱的刚度特性与阻尼特性,可以实现阻尼状态的四级可调。建立减振支柱各组成部分的数学模型,该模型能够很好地描述减振器支柱在四个阻尼状态下的力学特性,可通过参数β反映减振器的阻尼调节动态性能,并仿真分析了参数β对减振器响应特性的影响,为半主动空气悬架控制策略的开发提供了依据。

The partuneters of semi-active air suspension can be regulated according to driving condition,which contributes to improve vehicle＇s overall performance.By dissecting a certain type of semi-active air suspension strut, its interred structure and damping adjust principle is analyzed. The stiffness and damping characteristics of this strut are obtained via bench, test, and four different damping values can be achieved.The mathematical model of the suspension strut is modeled,which can descript the strut＇s characteristics well, the damping adjustment dynamic performance can be reflected by β, and the impact of β on the response of shock absorber is analyzed in simulation, providing a basis for the development of semi-active air suspension control strategy.