Affiliations: School of Mechanical Engineering, Zhengzhou University, Zhengzhou, Henan, China
Correspondence:
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Corresponding author: Yufeng Su, School of Mechanical Engineering, Zhengzhou University, Zhengzhou, Henan, China. Tel.: +86 37167781235; Fax: +86 37167781786; E-mail: yufengsu@zzu.edu.cn.
Abstract: To better understand and make use of its characteristics, a diamagnetic levitation structure, which consists of NdFeB permanent magnets and pyrolytic graphite sheets, is studied in this report. Finite element analysis is performed to analyze the influence of floating magnets with different structures and sizes on the equilibrium spacing and movement space of a floating magnet. The key factors that affect the equilibrium spacing and movement space are obtained, and the effectiveness of the simulation is verified experimentally. Compared to the experimental results, the maximum simulation error is less than 10%. A forced vibration model with a single degree of freedom is used to denote the diamagnetic levitation structure, and the natural frequency is analyzed to be 4.87 Hz for the structure in this study. The nonlinear characteristics of the system are studied to obtain a better understanding of the vibration of the nonlinear system. The diamagnetic levitation structure has great potential in the application of vibration energy harvesters or noncontact sensors and actuators.
Keywords: Diamagnetic levitation, magnet, pyrolytic graphite, nonlinear, movement space, equilibrium position
