Guidance Characteristics of Low-speed Maglev Vehicles: Static Analysis and Dynamic Simulation

摘要

In order to obtain the guidelines of the guidance design of the low-speed maglev vehicle, this paper investigates the static and dynamic guidance characteristics of the maglev vehicle with various guidance modes. First the laterally staggered and centred magnet pairs are introduced in the design of guidance structure, and the active guidance strategies and techniques are discussed based on the practical application requirements. Then, considering four kinds of guidance modes, static guidance characteristics involving the guidance force, the guidance stiffness and the couple degree of the magnet vertical-lateral motion are deduced theoretically and analyzed. Moreover, a 35-degree-of-freedom spatial model of the low-speed maglev vehicle is established and its lateral dynamic responses are simulated to evaluate the dynamic guidance performances. In conclusion, theoretical analyses and simulation results show that the laterally centred magnet pairs are more suitable to the passive guidance mode while the laterally staggered magnet pairs are of advantage to the active guidance. The active guidance using lateral displacement feedback can not only increase the guidance stiffness, but also decouple the magnet vertical-lateral couple motion in a considerable lateral displacement range. However, the lateral acceleration feedback has little effect on improving the guidance performances. It is suggested that the low-speed maglev vehicle should adopt the guidance mode embodying the laterally staggered magnet pairs and active guidance using the lateral displacement and velocity feedback.