Investigation of the state feedback control strategy based on hybrid magnetic levitation for TR train

Based on the parameters of TR Maglev train, a mathematic model of air gap control system with hybrid suspension of electro- and permanent magnet was established. Introduced by the control strategy of state feedback, the start-up characteristics of hybrid Maglev control system were analyzed and compared under the condition of ramp and instantaneous spring inputs. With the disturbances of air gap spring and sine electromagnetic suspension force, the regulating process of hybrid Maglev was researched. In comparison to traditional electromagnetic suspension, the research results showed that hybrid Maglev has traits of low power losses in electromagnetic poles, longer adjusted distance of air gap, and the air gap control system of hybrid Maglev has the merits of higher control precision, swifter response and stronger robust performance.