CAJ | 학술논문

分析汽车各向运动的耦合作用规律，建立23自由度三向耦合重型汽车整车模型，推导系统运动微分方程。将非线性 Gim 模型与垂向点接触轮胎模型结合描述三向非线性轮胎力，建立6个一阶常微分方程，以实时计算各车轮转速计算滑移率。通过数值积分计算车辆转向制动、匀速直线及方向盘角跃阶时的动态响应，并与传统的操纵稳定性模型、平顺性模型、虚拟样机模型及试验数据比较，验证所建模型的有效性。通过分析耦合作用对汽车响应影响表明，该耦合模型可同时研究汽车在复杂工况的平顺性、操纵稳定性及制动性。
분석기차각향운동적우합작용규률，건립23자유도삼향우합중형기차정차모형，추도계통운동미분방정。장비선성 Gim 모형여수향점접촉륜태모형결합묘술삼향비선성륜태력，건립6개일계상미분방정，이실시계산각차륜전속계산활이솔。통과수치적분계산차량전향제동、균속직선급방향반각약계시적동태향응，병여전통적조종은정성모형、평순성모형、허의양궤모형급시험수거비교，험증소건모형적유효성。통과분석우합작용대기차향응영향표명，해우합모형가동시연구기차재복잡공황적평순성、조종은정성급제동성。
The coupling relationships of vehicle motions in different directions were analyzed.A heavy vehicle model of 23-DOF with coupled three directional motions was built and the equations of motion of the vehicle were deduced.The nonlinear tire forces in different directions were calculated by using the nonlinear Gim model together with the vertical single dot contact model.Six one-order ordinary differential equations were deduced to calculate the wheel rotating speed at real time and to get the slip ratios.Under the turning-braking combined condition,the uniform straight running condition and the steering wheel angle step condition,the dynamic responses of the vehicle were simulated respectively by numerical integration.The validity of the new vehicle model was verified by comparing the dynamic responses calculated with these by the traditional handling and stability model,the traditional ride comfort model,the functional virtual prototyping model and test data.The effects of coupling action on vehicle responses were also analyzed. The results show that the proposed three-directional coupled model is suitable to investigate simultaneously the ride comfort,handling stability and brake properties of vehicles in complicated driving conditions.