This study aims to present a method for matching the stiffness and damping of a magneto-rheological (MR) air suspension system that will ensure optimal ride comfort of a road vehicle traveling on roads with different roughness and speeds. The authors study the matching of the damping coefficient with the damping ratio, and obtain the adjustment range of the damping coefficient. Based on the linearization of the air spring, a suspension model with adjustable stiffness and adjustable damping has been established. To improve the ride comfort of the vehicle and to control the dynamic deflection and dynamic load, the optimal matching of stiffness and damping under different working conditions has been analyzed by using the stepwise optimal solution method. Then, the authors design four stiffness levels and five damping levels, and propose the parameter matching scheme of the MR air suspension system. The theoretical analysis shows that the proposed scheme can improve vehicle vertical dynamic performance. Four levels of adjustment for the width of the orifice between the air spring and auxiliary chamber and six levels of adjustment for the MR damper have been designed respectively. The findings of this study will inform other studies on vibration control.

本研究旨在提出一种匹配磁流变 (MR) 空气悬架系统刚度和阻尼的方法，以确保在不同粗糙度和速度的道路上行驶的公路车辆的最佳乘坐舒适性。作者研究了阻尼系数与阻尼比的匹配，得到了阻尼系数的调整范围。在空气弹簧线性化的基础上，建立了刚度可调、阻尼可调的悬架模型。为提高车辆的乘坐舒适性，控制动挠度和动载荷，采用逐步优化求解方法，分析了不同工况下刚度和阻尼的最优匹配。然后，作者设计了四个刚度级别和五个阻尼级别，并提出了MR空气悬架系统的参数匹配方案。理论分析表明，所提出的方案可以提高车辆的垂直动态性能。空气弹簧与副室之间的孔口宽度分别设计了四级调节和磁流变阻尼器的六级调节。这项研究的结果将为其他振动控制研究提供信息。