【作者】 王从思； 段宝岩； 仇原鹰；

【Author】 WANG Cong-si DUAN Bao-yan QIU Yuan-ying (School of Electromechanical Engineering,Xidian University,Xi’an 710071,China)

【机构】 西安电子科技大学机电工程学院；

【摘要】 基于准确反映天线变形反射面实际形状的目的,提出了一种新的分块拟合方法。该方法首先对变形反射面进行分块划分,再对每个块域分别进行 Coons 曲面拟合,并采用周向三次与径向二次 B 样条曲线确定块域的边界条件,进而准确得到反射面变形的局部与整体信息。通过对某16m 天线在不同工况下的机电性能综合分析,证明了此方法是准确、有效的。更多还原

【Abstract】 A divided-fitting method using B-spline curves to fit the distorted antenna affected by different loads is presented for accurately describing the real deformation.It firstly divides the distorted reflector into many individual zones,uses the Coons surface to fit each zone,and determines the boundary of each zone by third-order hoop and second radial B-spline curves.Then the analysis of aperture error makes it possible to compute the electrical performances of antenna with the precise local and total information of distorted reflector. The simulation results ofa 16-m parabolic antenna proved the validity of new method.更多还原