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轮胎和路面特性对车辆制动稳定性具有重要影响.基于路面分形理论和GW接触理论,对轮胎路面实际接触面积模型和粘弹性能量损失进行了简化,建立了改进的滑动摩擦因数模型,着重分析了轮胎和路面特性对滑动摩擦因数的作用;通过引入Fiala非线性轮胎模型,考虑了轮胎和路面特性对轮胎作用力的影响;根据15DOF整车模型的适当简化,提出了考虑轮胎动摩擦特性的整车模型.应用PC-Crash对整车模型进行了验证,使用Matlab对模型进行了仿真分析.结果表明:该模型能够表征轮胎和路面特性对车辆制动稳定性的影响,为研究车辆制动时各轮胎动态力差异提供理论基础.
Tire and pavement characteristics have an important influence on vehicle braking stability.Based on fractal theory and GW contact theory, the actual contact area model and viscoelastic loss of tire road surface are simplified, and an improved sliding friction coefficient model is established, focusing on analysis The effect of tire and pavement characteristics on the sliding friction coefficient was introduced. By introducing Fiala nonlinear tire model, the influence of tire and pavement characteristics on tire force was considered. According to the proper simplification of 15DOF vehicle model, Vehicle model.The PC-Crash is used to verify the vehicle model and the model is simulated by Matlab.The results show that the model can characterize the tire and pavement characteristics of the vehicle braking stability, in order to study the vehicle braking The dynamic force difference between the tires provide the theoretical basis.