双气室油气悬挂建模与特性研究

悬挂性能直接决定着车辆行驶平顺性和操控稳定性，双气室油气悬挂系统是一种新型悬挂。阐述了双气室油气悬挂的工作原理并建立了其参数化模型，通过与传统被动式悬挂的传递函数的比较，揭示了其刚度和变阻尼可随激励频率改变自动改变的特性。采用非支配排序遗传算法进行了多目标优化，结果显示其三个悬挂性能指标均优于传统的被动式悬挂。根据多目标优化得到的Pareto最优解选取悬挂参数，并进行时域仿真验证了上述结论。 

Modelling and Analysis on the Characteristics of Dual-Chamber Hydro-Pneumatic Suspension

Ride comfort and road-holding are effected by the vehicle suspensions.The dualchamber hydro-pneumatic (DCHP) suspension is a novel passive suspension system.This paper discribes the operating principle of the DCHP suspension and establishes its parametric model.Through the transfer functions comparisons between the traditional passive suspension and the DCHP suspension,it's found that the equivalent stiffness and damping coefficient can adjust their own values according to the frequency of the excitation from road surface.The multi-objective optimization of suspension parameters is implemented with NSGA-Ⅱ algorithm.The results indicate that all three performance metrics of the novel system are better than those of the traditional passive suspension.The above conclusion is verified by the simulation in time domain with suspension parameters provided by the Pareto solutions.