基于魔术公式的磁流变阻尼器参数化模型研究

Research on magnetorheological damper parametric model based on magic formula

为更好地描述磁流变阻尼器滞环等非线性特性,将修改的魔术公式引入磁流变阻尼器建模中,建立了新的磁流变阻尼器魔术公式模型.分析了模型参数与电流和外部激励之间的耦合关系,利用遗传算法对该模型参数进行辨识.将与阻尼器实验数据拟合的魔术公式模型,在不同工况下与目前常用的现象模型进行了仿真对比和误差分析.结果表明:新模型结构简单,能更好地描述阻尼力与外部激励之间的耦合关系,参数辨识方便快捷,各工况下精度较高,具备较好的适应性和通用性.

In order to get a better description to the nonlinear characteristics of magnetorheological dampers,the magic formula was introduced into the general method of parametric modeling of magnetorheological dampers and a new magnetorheological damper magic formula model was proposed.The coupling relationship between model parameters and current with external excitation was analyzed,and the parameters of the model were identified by genetic algorithm.The magic formula model which was fitted with the damper experimental data was simulated and compared with the commonly used phenomena model under different working conditions.The results show that the new model is simple in structure and can better describe the coupling relationship between damping force and external excitation;its parameter identification is convenient and fast;the precision under various working conditions is higher,and it has better adaptability and versatility.