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Eddy current damper feasibility in automobile suspension: modeling, simulation and testing

机译：汽车悬架中涡流阻尼器的可行性：建模，仿真和测试

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This paper presents the modeling, simulation and testing of a novel eddy current damper (ECD) to be used in vehicle suspension systems. The conceived ECD utilizes permanent magnets (PMs), separated by iron poles that are screwed to an iron rod, and a conductive hollow cylinder to generate damping. Eddy currents develop in the conductor due to its relative motion with respect to the magnets. Since the eddy currents produce a repulsive force that is proportional to the velocity of the conductor, the moving magnet and conductor behave as a viscous damper. The structure of the new passive ECD is straightforward and does not require an external power supply or any other electronic devices. An accurate, analytical model of the system is obtained by applying electromagnetic theory to estimate the electromagnetic forces induced in the system. To optimize the design, simulations are conducted and the design parameters are evaluated. After a prototype ECD is fabricated, experiments are carried out to verify the accuracy of the theoretical model. The heat transfer analysis is established to ensure that the damper does not overheat, and the demagnetization effect is studied to confirm the ECD reliability. The eddy current model has 1.4 N RMS error in the damping force estimation, and a damping coefficient as high as 53 N s m(-1) is achievable with the fabricated, scaled-down prototype. Finally, a full-size ECD is designed and its predicted performance is compared with that of commercial dampers, proving the applicability of the ECD in vehicle suspension systems.
机译：本文介绍了一种用于车辆悬架系统的新型涡流阻尼器（ECD）的建模，仿真和测试。设想的ECD利用永磁体（PMs）和导电空心圆柱体（由固定在铁棒上的铁杆隔开）和导电空心圆柱产生阻尼。由于导体相对于磁体的相对运动，在导体中会产生涡流。由于涡流产生的排斥力与导体的速度成正比，因此运动的磁体和导体的作用就像粘性阻尼器。新型无源ECD的结构简单明了，不需要外部电源或任何其他电子设备。通过应用电磁理论估算系统中感应出的电磁力，可以获得准确的系统分析模型。为了优化设计，进行了仿真并评估了设计参数。在制作原型ECD之后，进行实验以验证理论模型的准确性。建立传热分析以确保风门不会过热，并研究消磁效果以确认ECD的可靠性。涡流模型在阻尼力估计中具有1.4 N RMS误差，并且使用制造的按比例缩小的原型可以实现高达53 N s m（-1）的阻尼系数。最后，设计了全尺寸ECD，并将其预测性能与商用减震器进行了比较，证明了ECD在车辆悬架系统中的适用性。

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