A hybrid type magneto-rheological (MR) fluid damper based on electromagnet and two permanent magnets apart from electromagnet was designed and its characteristics were analyzed numerically. In the proposed MR damper, the magnetic field is generated by the permanent magnet and raised by the additional electromagnet. This combination provides a larger amount of damping force with lower consumption of electric energy. The proposed model has an additional advantage of providing a moderate damping force in case of electromagnet failure. The magnetic circuit of a hybrid MR valve was analyzed by applying Kirchhoff’s law and magnetic flux conservation rule. A 2D axisymmetric model of the proposed hybrid MR damper was developed in commercial software where magnetic field properties are analyzed by finite element method. The optimization process was developed to optimize the geometric parameters and generated damping force using design of experiment (DoE) technique. The damping force of the MR damper was selected as an objective function. The optimal solution to the optimization problem of the hybrid MR valve structure was evaluated and compared with the solution obtained from the initial parameters. It is demonstrated that the novel hybrid type provides higher damping force than the previous model.

设计了一种基于电磁铁和除电磁铁外的两个永磁体的混合型磁流变（MR）流体阻尼器，并对其特性进行了数值分析。在所提出的MR阻尼器中，磁场由永磁体产生并由附加的电磁体升高。这种组合提供了较大的阻尼力，同时降低了电能消耗。所提出的模型还有一个额外的优点，就是在电磁故障的情况下提供适度的阻尼力。应用基尔霍夫定律和磁通守恒律对混合式MR阀的磁路进行了分析。在商业软件中开发了所提出的混合MR阻尼器的二维轴对称模型，其中通过有限元方法分析了磁场特性。利用实验设计（DoE）技术开发了优化过程，以优化几何参数和产生的阻尼力。选择MR阻尼器的阻尼力作为目标函数。评估了混合MR阀结构优化问题的最佳解决方案，并将其与从初始参数获得的解决方案进行了比较。结果表明，新型混合动力车型比以前的车型具有更高的阻尼力。