基于Bingham模型的磁流变阻尼器模型改进研究

Research of Improving MRD Model Based on Bingham Model

磁流变阻尼器能够实现阻尼可控,作为半控制的智能器件应用在众多领域。在实验基础上,基于Bingham力学模型,建立了包括线性和非线性的磁流变液阻尼器的力学模型,通过数学方法对模型参数进行辨识,得到对应的方程。由于多项式的非线性模型,容易产生Runge振荡现象,而不能通过有效的方法得到合适阶数,所以采用傅立叶级数建立非线性模型。分别对线性和非线性模型与实验结果进行对比分析,得到的结果表明:线性模型在有加载电流下,低速时不能准确表达阻尼器的实际特性,基于傅立叶级数的非线性模型能够准确地反映磁流变阻尼器的非线性响应,曲线和实验结果基本吻合。研究结果为磁流变阻尼器动力模型的建立提供了参考。

Magnetorheological damper(MRD)can realize controllable damping,which is used as a semi-controlled smart device in many fields.On the basis of the experiment and based on the Bingham mechanical model,mechanical model of MRF damper including linear and non-linear are established.Each of the theoretical mathematical model was obtained after parameter identification.Due to the non-linear polynomial model was easy to produce Runge turbulence,and the appropriate order could not be obtained by effective methods.Therefore,the nonlinear model was built by Fourier series.The linear and nonlinear models were compared with the experimental results respectively.The results show that the linear model can not accurately represent the actual characteristics of damper at a low speed with a load current.The nonlinear model based on Fourier series can exactly reflect the nonlinear response of the MRD,and the curve is basically consistent with the experimental results.The results can provide the reference of MRD dynamics model of establishment.