Institute of Electrical Engineering and Electronics, Poznan University of Technology, 60-965 Poznan, Poland.
Institute of Mechanical Technology, Poznan University of Technology, 60-965 Poznan, Poland.
Sensors (Basel). 2022 Dec 29;23(1):358. doi: 10.3390/s23010358.
The paper presents a field model of coupled phenomena occurring in an axisymmetric magnetorheological brake. The coupling between transient fluid dynamics and electromagnetic and thermal fields as well as mechanical equilibrium equations is taken into account. The magnetic field in the studied brake is of an excited hybrid manner, i.e., by the permanent magnets (PMs) and current in the excitation winding. The finite element method and a step-by-step algorithm have been implemented in the proposed field model of coupled phenomena in the considered brake. The nonlinearity of the magnetic circuit and rheological properties of a magnetorheological fluid (MR fluid) as well as the influence of temperature on the properties of materials have been taken into account. To solve equations of the obtained field model, the Newton-Raphson method and the coupled block over-relaxation method have been implemented. The elaborated algorithm has been successfully used in the analysis of the phenomena in the considered magnetorheological brake. The accuracy of the developed model and its usefulness have been verified by a comparative analysis of the results of simulation and laboratory tests carried out for the developed prototype of the studied brake.
本文提出了一种轴对称磁流变制动器中耦合现象的场模型。考虑了瞬态流场与电磁场和热场以及机械平衡方程之间的耦合。研究中制动器的磁场采用混合激励方式，即由永磁体（PM）和激励绕组中的电流共同产生。在提出的考虑制动器的耦合现象的场模型中，实现了有限元方法和逐步算法。考虑了磁路的非线性和磁流变液（MR 液）的流变性能以及温度对材料性能的影响。为了解决所得到的场模型的方程，实现了牛顿-拉普森方法和耦合块超松弛方法。所阐述的算法已成功应用于所研究的磁流变制动器中现象的分析。通过对所开发的制动器原型进行模拟和实验室测试结果的比较分析，验证了所开发模型的准确性及其有用性。
