改进的车辆平顺性模型

首次利用坐标变换的方式建立了车辆平顺性系统数学模型,将模型输入信号转换为前、后桥的加速度信号。与传统的整车平顺性模型比较,由于把工程中常用的加速度信号作为模型的输入,不仅提高了模型的计算精度,而且在工程实际中更加具有使用价值;利用等效变换将复杂的轮胎分离出去,也增加了模型的真实性。利用matlab/simulink建立了整车平顺性仿真模型,考虑到板簧刚度、阻尼的非线性,对模型中的复杂输入参数进行了初步探讨。为了验证仿真模型的有效性,进行了相关的整车试验。对比试验数据和仿真曲线,可以看出平顺性模型的仿真结果与试验结果是非常吻合的。

Improvement of vehicle ride comfort model

The coordinate transform was used firstly to establish a mathematical model for the vehicle ride comfort system.The input signals of the model were transformed into the acceleration signals of the front axle and the rear driving axle.Compared with the traditional vehicle ride comfort model,the calculation accuracy of the proposed model was improved and appeared more practical in engineering because of using the acceleration signal as input signal.The complicated tyres were separated by the equivalent transform which made the model more available.A vehicle ride comfort simulation model was established by means of software package matlab/simulink,and its complicated input parameters were discussed considering the stiffness of the flat spring and the nonlinearity of the damping.In order to validate the simulation model,the corresponding vehicle tests were performed.The comparison between the test data and the simulation curves showed that their agreement was quite good.