| Citation: | MA Ya-qun, XU Ao-kang, MA Wei-hua, LI Miao, LU Jing, LUO Shi-hui. Magnetic force characteristics and dynamics simulation of permanent magnet suspension system based on inclined suspension surface[J]. Journal of Traffic and Transportation Engineering, 2026, 26(9): 74-87. doi: 10.19818/j.cnki.1671-1637.2026.330
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A concise structural scheme of sideslip suppression was proposed for an inclined suspension surface. By adopting a passive structural design, the scheme realized sideslip suppression by virtue of gravity component force and additional lateral force, with no additional complex active control components required and high engineering feasibility. In the research, the calculation models of suspension force and lateral force for the inclined suspension surface were derived based on the equivalent magnetic charge method. A 3D magnetic field finite element analysis (FEA) model was established with small-size N45H permanent magnets and verified by bench tests. A full-scale FEA model was constructed, in which five transversely arranged Halbach arrays of permanent magnets were deployed on both the vehicle and track sides. Combined with the multi-body dynamics model of a single vehicle, simulation analyses were carried out under the straight-line condition of 60 km·h-1 and the small-radius curve condition of 20 km·h-1. Research results show that after the magnetic force characteristics analysis, the inclination of the suspension surface has a weak influence on suspension force, with a maximum variation amplitude lower than ±1 kN, and produces a significant promotion effect on lateral force. The maximum lateral force at an inclination angle of 10° increases by 153% compared with that at 0°. Under the straight-line condition, the inclination angle of 9.5° reduces the fluctuation of suspension force of permanent magnet pairs by approximately 19.59%, improves the contact stability of guide wheels, and significantly reduces the lateral offset. During curve passing, the amplitude and fluctuation of suspension force decrease, while the amplitude and fluctuation of lateral force increase slightly. The lateral positioning accuracy of vehicles is optimized, and the sideslip is effectively suppressed. The regulation law and engineering design interval of inclined suspension surfaces are clarified, providing theoretical basis and data support for the structural optimization, parameter matching, and engineering application of permanent magnet suspension transportation systems.
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