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通过理论分析建立了液力变矩器的分段线性化扭振计算模型 ,并对其进行了简化 .采用实验参数辨识的方法 ,借助Matlab/Ident工具箱 ,得到了系统的频率特性 ,通过逐段线性化方法 ,确定了系统的参数模型 ,从而确定了模型中的阻尼参数 .通过曲线拟合得到了阻尼随转速比的变化曲线 .为了验证辨识精度 ,取转矩为输入量 ,转速为输出量 ,利用Matlab/Ident工具箱比较了辨识和试验的输出结果 ,表明所建立的模型是准确的 ,辨识得到的阻尼值具有一定的精度
Through the theoretical analysis, the piecewise linearized torsional vibration model of the torque converter was established and simplified, and the frequency characteristics of the system were obtained by using the method of experimental parameter identification and Matlab / Ident toolbox. Section linearization method to determine the parameters of the system to determine the damping parameters in the model obtained by curve fitting damping curve with the speed ratio in order to verify the identification accuracy, take the torque as input, the speed of the output The results of the identification and test were compared using the Matlab / Ident toolbox. The results show that the model is accurate, and the identified damping value has a certain accuracy