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Fuzzy logic control of electrodynamic levitation devices coupled to dynamic finite volume method analysis

机译：电动悬浮装置的模糊逻辑控制耦合动态有限体积法分析

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Electrodynamic levitation devices, which utilizing eddy currents induced in the levitated item to produce the repulsive force, are being involved in many engineering applications due to its fast response. This kind of repulsion is particularly used in electromagnetic launcher, electromagnetic brake and other applications. To analyze and improve the dynamic behavior and performances of such devices, the conventional way is using the finite element method (FEM), due to its ability of using adaptive mesh to handle complex geometries. Nevertheless, it has a serious limitation in efficiency for large number of variables which is reflected by the high cost in terms of computational properties. During the past few years, the finite volume method FVM formulations have gained attention inside the electromagnetic community. The method has been proved its effectiveness in the solution of different kinds of problems, such as in magnetostatic field computation and eddy current nondestructive testing. The FVM method is particularly attractive thanks to its small required storage memory and reduced CPU time. In this paper an FVM model is developed to analyze the dynamic characteristic of the motion of the electrodynamic levitation device TEAM Workshop Problem 28. The dynamic characteristic of the motion is obtained by solving the electromagnetic equation coupled to the mechanical one. The repulsive force applied to the levitated plate of TEAM Workshop Problem 28, is computed by the interaction between eddy current induced in the plate and the magnetic flux density. A comparison between experimental and numerical results is carried out to show the efficiency of the developed model. What's more, based on the developed FVM model, a fuzzy logic controller FLC is designed and implemented to control the position of the levitated item.
机译：利用悬浮物品中感应的涡流产生排斥力的电动悬浮装置由于其快速响应而正在许多工程应用中使用。这种排斥力特别用于电磁发射器，电磁制动器和其他应用中。为了分析和改善此类设备的动态行为和性能，传统方法是使用有限元方法（FEM），因为它具有使用自适应网格处理复杂几何形状的能力。然而，它对大量变量的效率存在严重限制，这在计算属性方面反映出高昂的成本。在过去的几年中，有限体积方法FVM公式已引起电磁界的关注。实践证明，该方法可有效解决静磁场计算和涡流无损检测等各种问题。 FVM方法因其所需的较小存储内存和减少的CPU时间而特别具有吸引力。本文建立了一个FVM模型来分析电动悬浮设备TEAM Workshop问题28的运动动力学特性。通过求解耦合到机械方程的电磁方程，获得运动的动力学特性。施加到TEAM Workshop Problem 28悬浮板的排斥力是通过板中感应的涡流与磁通密度之间的相互作用来计算的。对实验结果和数值结果进行了比较，以显示所开发模型的效率。此外，基于开发的FVM模型，设计并实现了一个模糊逻辑控制器FLC来控制悬浮物品的位置。

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