磁悬浮助推发射系统悬浮导向特性分析

Calculation and Analysis of Maglev Levitation and Guidance System in Magnetic Launch-Assist System

可用于航天磁悬浮助推发射的超导电动磁悬浮系统的悬浮导向结构主要由橇载环形超导线圈和位于导轨两侧的"8"字形零磁通线圈构成,运用动态电路理论分别对环形超导线圈和"8"字形线圈进行了分析,构建了数学模型,模型包括了矩阵微分方程和三向电磁力学表达式。结合仿真计算结果,详细分析了基本动态单元模型中电感、电流以及三向电磁力的特性,研究了单个及多个超导线圈掠过导轨时悬浮力的水平和特性。在此基础上,结合航天运载器发射参数,分析了系统各个参数的变化,设计了磁悬浮助推发射系统中悬浮导向系统的初步方案。

Under the background of space transportation, characteristics of maglev levitation and guidance system in electro-dynamic system（EDS） were studied. The EDS was constituted by circular coil on slide and null-flux coil along both side of the track. Mathematical models, including very general force expressions that can be used for the development of computer codes, are provided for each of these suspension systems. General applications and advantages of the dynamic circuit model are summarized. On the basis of simulation result, properties of inductance, current, and electromagnetic forces in basic units were analyzed, and the properties of suspension forces of nmhiple coils were studied. And then, combined with space vehicle launching parameters, various parameters of EDS were analyzed and the EDS used for magnetic lauch-assist system was preliminary designed.