电波科学学报2024，Vol.39Issue(3)：502-509,8.DOI:10.12265/j.cjors.2024021
任意凸目标测地线自适应高效算法
An efficient adaptive algorithm for geodesic path of arbitrary convex targets
摘要
Abstract
The high frequency surface wave starts propagating from the shadow boundary of the arbitrary curved surface along the geodesic path.The diffracted field contributed by the surface wave could be computed by the integral of the Fock current along the geodesic.In this paper,we improve the traditional shadow boundary algorithm and propose an improved geodesic tracing method based on projection angle method(PAM).The patch adaptive reconstruction method to optimize the shadow boundary of the triangular patch is proposed and adjudge precise shadow boundaries which divide light and shadow patches on the curved surface.Furthermore,an improved method for geodesic tracing based on the projection angle method is presented,which can accurately identify the propagation patch of the geodesic path.Based on direction and distance parameters,the barycentric coordinate method is applied to optimize the propagation point to form an accurate geodesic path.Numerical examples verify that the proposed method could calculate the geodesic path of the arbitrary curved surface with a 10-3 geodesic curvature such as body of aircraft and missile,which could meet the engineering requirements for computing the creeping wave scattered field.关键词
三角网格/阴影边界优化/面元自适应重构/投影夹角法(PAM)/测地线循迹Key words
triangular patch/shadow boundary optimization/patch adaptive reconstruction/projection angle method(PAM)/geodesic tracing分类
信息技术与安全科学引用本文复制引用
李顾凯,吴语茂,窦玉莹,刘鹏..任意凸目标测地线自适应高效算法[J].电波科学学报,2024,39(3):502-509,8.基金项目
国家优秀青年科学基金(62022028) （62022028）
国家自然科学基金重点项目(62231021) （62231021）
国家自然科学基金面上项目(61971144) （61971144）
国家重点研发计划(2020YFA0711900,2020YFA0711901) （2020YFA0711900,2020YFA0711901）
