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-drivenSea Surface and Ship Wake

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。

Abstract:

The reconstruction for orbital velocity field (OVF) of wind-driven sea surfaceand 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 seriesand fast Fourier transform (FFT) is proposed, The computational complexities of the LSQmethod and the proposed method are analyzed theoretically, The accuracy and rapidity of theproposed method are verified through the reconstruction for OVF of wind-driven sea surfaceand ship wake.