关键词: 变厚度, 蜂窝材料, 反演算法, 循环

Abstract: The design of broadband radomes often starts from aerodynamic contour to make electrical performance calculation that ends with obtaining of an optimized radome structure with a changing honeycomb layer thickness on basis of three dimensional surfaces. The male mold used to manufacture radome often has tolerances that lead to inaccuracy of the electrical thickness for the radome wall structure. This paper, by using reverse iteration algorithm, obtains accurate outer contour by using point coordinates and its normal vector of the finished male mold, angle positions of points and thickness formulation of radome. As reverse iteration goes on, point coordinates on outer surface of radome as well as the transformation matrix that changes inner real normal vector to normal vector of outer surface converges. When accuracies are achieved, reverse iteration ends. Using obtained outer surface coordinates, its normal vector as well as the thickness formulation, the outer surface of the two layers of honeycomb can be formed. With this method, precise electrical performances can be achieved even when the shaping mold has discrepancies and tolerancies.

Key words: changing thickness, honeycomb material, reversed algorithm, iteration