【摘要】 提出一种基于车辆动力学仿真的重型货车悬架系统多目标优化策略,可同时改善车辆的平顺性和道路友好性,从而缓解驾驶疲劳、延长道路使用寿命.基于车辆动力学原理在Matlab/Simu-link平台上构建了10自由度钢板悬架重型货车-路面系统的动力学模型,选择与该车匹配的被动空气悬架并设计半主动空气悬架模糊控制器;仿真并分析钢板悬架车辆模型、被动空气悬架车辆模型、半主动空气悬架车辆模型的使用效果;以被动空气悬架作为进一步优化的对象,归纳其平顺性和道路友好性随阻尼系数的变化规律,从而得到使车辆综合性能最优的悬架阻尼系数.更多还原

【Abstract】 A suspension optimization strategy which could enhance ride comfort and road friendliness of heavy truck is presented based on vehicle dynamic simulation.Thus,the reduction of driving fatigue and the extension of road service life could be realized.Firstly,a 10-DOF heavy truck assembled with leaf spring-road model system is established using Matlab/Simulink.Subsequently,the passive air suspension matching the truck is chosen and the semi-active air suspension fuzzy controller is designed.In order to compare the effects of different suspensions,simulation results of leaf spring suspension truck,passive air suspension truck and semi-active air suspension truck are analyzed.Passive air suspension is chosen for further optimization.Through simulation,changing laws of ride comfort and road friendliness following the variation of suspension damping are summarized,from which the best damping coefficients of passive air suspension are finally obtained.更多还原