基于径向最大面截距优化下的FAST反射面形状调节

FAST Reflector Shape Adjustment Based on Radial Maximum Intercept Optimization

针对国家重大科学工程500 m口径球面射电望远镜(FAST)主动反射面的工作原理,将工作抛物面调节成与理想抛物面尽可能接近。本文从调节FAST主动反射面形状的问题出发,通过考虑形变目标的基本标准和各类参数指标,给出了FAST天文望远镜的抛物面拟合方程,并利用有限元分析法以及Monte Carlo算法,建立了径向最大面截距的优化模型,提高了FAST馈源舱的信号接收效果。

According to the working principle of the active reflector of the 500m aperture spherical radio tele‐scope(fast),a major national scientific project,the working paraboloid is adjusted to be as close to the ideal parabo‐loid as possible.Starting from the problem of adjusting the shape of fast active reflector,by considering the basic stan‐dards and various parameter indexes of deformed targets,this paper proposes the paraboloid fitting equation of the fast astronomical telescope,and establishes an optimization model of the radial maximum surface intercept by using the fi‐nite element analysis method and Monte Carlo algorithm,which improves the signal receiving effect of the fast feed module.