基于磁流变减摆器的修正Bouc-Wen模型参数辨识

Parameter Identification of Modified Bouc-Wen Model Based on Magnetorheological Shimmy Damper

磁流变阻尼器现已应用于多个领域,但其低速下的动力学滞回特性是许多数学模型难以解决的问题。文章在磁流变减摆器阻尼力特性实验数据的基础上,基于修正Bouc-Wen模型,建立了含滞回环的非线性阻尼力计算模型。通过数学计算,分析模型参数对滞回环大小及旋转方向的影响,并对模型进行参数辨识。对比模型仿真数据与实验数据,结果表明:基于修正Bouc-Wen模型建立的非线性阻尼力计算模型,仿真结果与实验数据拟合程度高,模型能够准确地体现磁流变减摆器在低速下的动力学滞回特性。

Magnetorheological(MR) damper has been applied to many fields,but the dynamic hysteretic behavior of it under low-speed is a problem,which is hard to solve for many mathematical models.On the basis of MR shimmy damper′s damping force character experimental data,a nonlinear calculation model including a hysteresis loop is bulit based on modified Bouc-Wen model.By mathematical calculation,it is analyzed that how the model′s parameters affect the size and the rotating direction of the hysteresis loop,and the model′s parameters are identified.Camparing the simulation data of the model and the experimental data,the result shows that they fit well.The damping force calculating model which is built based on Bouc-Wen model can reflect the dynamichysteretic behavior of MR shimmy damper under low-speed.