RCS analysis of hypersonic cruise vehicle

In order to improve the engineering method of Radar Cross Section (RCS) of Hypersonic Cruise Vehicle (HCV), high frequency scattering theories, including geometrical optics (GO), physical optics (PO) and method of equivalent currents (MEC), are used. By these methods, RCS of various scattering centers of HCV is computed. Combined with the engineering RCS formula of ideal dihedral corner reflector, the concept of equivalent illustration area (EIA) is presented, which is applied to compute the RCS of wing and fuselage joints. To compute RCS of whole HCV, the shadowing relationship of facet analyzed by the method of backward surface identification and depth-buffer is considered. The computed result is good fit for the result of MOM and can satisfy the need of engineering analysis and multi-objective optimization of aircrafts.