Floating Control Method for Permanent Magnetic Levitation Platform with Variable Flux Path

SUN Feng; PEI Wenzhe; JIN Junjie; ZHAO Chuan; XU Fangchao; ZHANG Ming

doi:10.3969/j.issn.0258-2724.20210964

Volume 57 Issue 3

Jul. 2022

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Journal of Southwest Jiaotong University > 2022 > 57(3): 531-539.

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SUN Feng, PEI Wenzhe, JIN Junjie, ZHAO Chuan, XU Fangchao, ZHANG Ming. Floating Control Method for Permanent Magnetic Levitation Platform with Variable Flux Path[J]. Journal of Southwest Jiaotong University, 2022, 57(3): 531-539. doi: 10.3969/j.issn.0258-2724.20210964

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Floating Control Method for Permanent Magnetic Levitation Platform with Variable Flux Path

doi: 10.3969/j.issn.0258-2724.20210964

School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China

Received Date: 23 Nov 2021
Rev Recd Date: 09 Feb 2022
Publish Date: 06 Mar 2022

Abstract

Abstract

Application of the magnetic levitation technology in ultra-clean transmission can effectively reduce dust pollution. The permanent magnetic levitation platform with a variable flux path has the characteristics of low-power consumption and anti-adsorption, which can avoid the large temperature rise in electromagnetic levitation systems and poor safety of hybrid electromagnetic levitation systems. To avoid the instability in the floating, three floating control methods are presented and validated, which are decentralized control, centralized control and integral separation. At first, the magnetic-force control mechanism of the platform is analyzed to build its dynamic model, and the decentralized control strategy is adopted to realize the floating. Furthermore, a 3-DOF centralized control strategy is proposed to prevent platform tilt, in which the vertical controller is PD (proportional differential) and the rolling and pitching are controlled by PID (proportional integral differential). Finally, the integral separation method is used for subsection control to realize the accurate vertical positioning. The results indicate that the centralized control method realizes the self-correction of the platform tilt angle with the adjustment time of 0.5 s, which solves the platform tilt caused by the magnetic characteristics difference of each pole in the decentralized control. Moreover, when using the integral separation method, the vertical steady-state error of the platform can be reduced from 0.23 mm to 0 with the adjustment time of 3.0 s.
- magnetic levitation system,
- permanent magnet,
- decentralized control,
- centralized control

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References(18)

References

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