A simulation model for four-axle heavy truck-road system is developed with ADAMS based on vehicle dynamics and virtual prototype technology and is then validated by a real vehicle ride comfort test.Properly configured air suspensions are chosen to replace the tandem suspensions on driving axles for preliminarily improve the road friendliness and ride comfort of vehicle.With the consideration of mechanical characteristics of shock absorber, a co-simulation with both ADAMS and Matlab/Simulink on semi-active modified skyhcok damping (MSD) control of the suspension system in heavy truck virtual prototype is conducted.Orthogonal experiment is designed with control parameters as variables.Finally the control parameters ensuring the best combined performance of road friendliness and ride comfort of truck are determined through range analysis and variance analysis.The simulation results indicate that semi-active MSD control can effectively improve both dynamic load and vertical vibration of truck with better robustness to the variation in road grade.%依据车辆动力学原理和虚拟样机技术,运用ADAMS构建了四轴重型货车-路面系统的仿真模型,并通过实车平顺性实验验证其正确性;选择合理匹配的空气悬架替换驱动轴平衡悬架,初步改善了车辆道路友好性和平顺性;在考虑减振器力学特性的基础上,同时采用ADAMS和Matlab/Simulink对四轴重型货车虚拟样机悬架系统的半主动改进天棚控制进行联合仿真.以控制参数为变量设计正交试验,通过极差与方差分析确定使车辆道路友好性和平顺性综合最优的控制参数.仿真结果表明,相对于半主动天棚控制,半主动改进天棚控制可有效改善轮胎的动载荷和垂向振动,且对路面等级的变化具有较强的稳健性.
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