具有主动悬挂的高速客车动力学性能研究

以具有二系横向主动控制悬挂装置的高速客车为例，建立了具有３１个自由度的整车数学模型。通过对系统主动悬挂简单数学模型最优控制的研究，给出了其控制规律，并用于高速客车的主动控制悬挂装置。通过对高速客车的运动稳定性、曲线通过性能、随机响应的动力学仿真分析表明，加装该二系横向主动控制装置不仅能提高高速客车的蛇行临界速度，而且能较大地改善高速客车的横向运行平稳性；高速客车曲线通过性能如脱轨系数、轮轨横向力均

Dynamic Performance of High Speed Passenger Cars with Active Suspensions

A mathematical model with 31 degrees of freedom is set up for high speed passeenger cars with secondary lateral active suspensions.A control law of the active suspension is obtained by optimizing a simplified model of the system, and then the law and the obtained parameters are applied to the full sized model of the same system.Through a dynamic simulation of stability, curving and stochastic responses of the system, it is shown that, by applying the secondary lateral active suspensions, not only can the critical hunting speed be increased, but also the ride comfort of passenger cars can be improved. At the mean time, the curving behaviour is also improved due to decreases in derailment ratio and W/R forces. Therefore, the active suspension technique greatly helps to improve the dynamic performance of high speed passenger cars.