Research And Design Of Control For HTS Hybrid Suspension System

As a newly-style vehicle on the land, maglev train has been put into practice successfully. The structure of traditional electro magnetic suspension (EMS) system is relatively simple and reliable. While the suspension power is very great, which would affect the increase of the suspension air-gap, for all the suspension force is provided by the windings of the electromagnetic iron. Aiming at these shortcomings, hybrid suspension system becomes a research hotspot in the world, such as super-and electro-conducting hybrid-levitation system, permanent-and electromagnetic hybrid-levitation system and so on. These hybrid suspension systems have great advantage in saving power and increasing air gap. Based on this background, and supported by Project 211 fund, this paper design hybrid suspension vehicles made of HTS(High Temperature Superconductor) and normal conductor coil.The hybrid electromagnets made of HTS coil and normal conductor are studied in this paper. The four-point suspension strategies are analyzed, which are mechanical decouple and electrical decouple. First, the dynamic model of the hybrid suspension system is analyzed, and then the state-space model and the transfer function model of this object are established, after analyzing the controllability, the PID controller is designed and simulated using Matlab/Simulink. Second, based on fuzzy control theory, two types of fuzzy controller are designed and simulated. On the premise that theoretical analysis is feasible, a experiment console is designed, including blending magnetic iron, four-quadrant chopper and digital controller based on DSP. The PID program is compiled, Software module design for hybrid maglev system, including:initialization module, control algorithm module, digital signal filtering module, A/D converting module and PWM module. The experiment result proves rationality of the experiment console that has been designed.