文档介绍：Study on the levitation control of
the Hybrid Maglev System
Xu Shaohui
(Electrical Machinery and Appliances)
Directed by Professor Jin Neng-qiang

Abstract
Structure of the proposed hybrid suspension system is introduced in this paper.
The four-point suspension strategies are analyzed, which are mechanical decouple and
electrical decouple. Then the equivalent method is employed to deduce the
mathematical model of the hybrid suspension system step by step, the levitation
forces of the hybrid suspension system at different air-gaps are simulated, which are
much larger than those of the pure electrical ic suspension system. The hybrid
system can really spare lots of electrical excitation, and then reduce the suspension
power loss on a large scale, and it is a very promising suspension style. The
experimental results of the levitation forces verify the model, hereby, the relative
reference dynamic model and the absolute reference dynamic model are illustrated.
The main schemes for the suspension system control are reviewed. State
feedback control, slide-mode control, optimal control and fuzzy control in the
levitation control for the suspension system are introduced, and the design method of
the state feedback control for the proposed hybrid system is described in detail.
Experimental results of the state feedback control is presented, which verify that the
state feedback control can realize stable suspension but it is not very flexile.
To improve the adaptability and increase the robustness of the suspension system,
expert control and fuzzy control are imported to the levitation control, and
human-simulated hierachical intelligent control is proposed, which includes three
levels. From the top to the bottom, the control precision is increasing while the
intellectual degree is reducing. Experimental results show that the proposed
human-simulated hierachical intelligent control used for hybrid suspension syst