风驱海面和舰船尾迹轨道速度场的快速重建方法  

Fast Reconstruction for Orbital Velocity Field of Wind-driven Sea Surface and Ship Wake

作　　者：李宇鑫 刘鹏[1] 顾丹丹 LI Yuxin;LIU Peng;GU Dandan(Key Laboratory for Information Science of Electromagnetic Waves(MoE),Fudan University,Shanghai 200433,China;Science and Technology on Electromagnetic Scattering Laboratory,Shanghai 200438,China)

机构地区：[1]复旦大学电磁波信息科学教育部重点实验室,上海200433 [2]电磁散射重点实验室,上海200438

出　　处：《制导与引信》2022年第1期42-47,共6页Guidance & Fuze

基　　金：上海航天科技创新基金(SAST2019-072);国家自然科学基金(61771142,61901269)。

摘　　要：针对在大范围海域下基于最小二乘方法的风驱海面和舰船尾迹轨道速度场重建方法重建速度慢的问题,提出了基于傅里叶级数和快速傅里叶变换的快速重建方法。从理论上对快速傅里叶变换和最小二乘法两种方法的计算复杂度进行了分析,并通过对风驱动态海面和舰船尾迹的轨道速度场重建,验证了基于快速傅里叶变换重建方法的准确性和快速性。The reconstruction for orbital velocity field(OVF)of wind-driven sea surface and ship wake is time consuming by using the least square quadratic(LSQ)method,especially for large-scale sea surface.A fast reconstruction method based on Fourier series and fast Fourier transform(FFT)is proposed.The computational complexities of the LSQ method and the proposed method are analyzed theoretically.The accuracy and rapidity of the proposed method are verified through the reconstruction for OVF of wind-driven sea surface and ship wake.

关 键 词：风驱海面 舰船尾迹 轨道速度场 快速傅里叶变换 

分 类 号：O353.2[理学—流体力学] TP391.9[理学—力学]