四轮车辆路面激励数学模型

Research on Assessment Method of Vibration Control Feature of Suspension System of Vehicle

基于滤波白噪声法,构建了单轮时域路面激励模型;考虑前轮后轮之间的延时特性,基于路面位移功率谱密度构建了左半车时域路面激励模型;考虑左轮右轮之间的相干性构建了前半车时域路面激励模型;以此综合构建出整车四轮时域路面激励数学模型。对所构建的路面激励模型进行仿真分析,说明了所建立的整车四轮时域路面激励数学模型的有效性。

To solve the problem of four-wheel road excitation input for the simulation analysis of vibration control performance on suspension system for whole vehicle,a single wheel time-domain road excitation model was presented based on filtered white noise method;in considering of the time-delay feature between front wheel and rear wheel,a left-half vehicle time-domain road excitation model was established based on road surface displacement power spectral density;in considering of the coherence between left wheel and right wheel,a front-half vehicle time-domain road excitation model was provided;then the four-wheel time-domain road excitation mathematic model of whole vehicle was given based on former models.Simulation analyses on the road excitation models are conducted,and the results illustrate and demonstrate the validity and effectiveness of the established four-wheel time-domain road excitation mathematic model of whole vehicle.