- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | LUO Cheng, TANG Hao, WAN Guohao, WANG Ying, LI Songqi, LUO Jun. Acceleration Feedback Control of Bilateral Permanent Magnet and Electromagnetic Hybrid Electrodynamic Suspension[J]. Journal of Southwest Jiaotong University, 2025, 60(4): 1024-1031. doi: 10.3969/j.issn.0258-2724.20240551
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To improve the dynamic stability of the permanent magnet (PM) electrodynamic suspension (EDS) and reduce the drag during low-speed operation, a bilateral PM and electromagnetic hybrid EDS system was studied. Firstly, a 2D analytical expression of the system electromagnetic force was derived based on Maxwell’s equations. The analytical results were verified by finite element numerical calculations, with a comparison of the electromagnetic force characteristics between unilateral and bilateral structures. Secondly, a suspension dynamic model of the system was established, and an acceleration feedback suspension controller was designed. Finally, a comparative analysis of the air gap, acceleration, and current waveforms under acceleration feedback suspension control and air gap feedback PID control was carried out through Simulink simulation when the system was subjected to track and load disturbances. The results show that the bilateral structure effectively increases the system float-to-drag ratio. At an operating speed of 100 km/h, the float-to-drag ratio for the unilateral and bilateral structures are 3.18 and 15.43, respectively. When the system is subjected to ± 1 mm track disturbances, the controller enables the system vibration acceleration and suspension air gap to quickly stabilize at rated positions of 0 and 20 mm, respectively. When the system is subjected to ± 2 000 N load disturbances, the acceleration feedback suspension controller allows the suspension air gap to quickly stabilize at 19.05 mm and 20.96 mm, respectively, while the PID controller stabilizes the coil current at 4.43 A/mm2 and −4.66 A/mm2, respectively. During stable operation, the steady-state coil current under the acceleration feedback suspension control is 0, while the steady-state suspension air gap under the PID control is 0. The system quickly returns to its initial rated operating state after the disturbances are eliminated.
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