多子阵SAS六自由度运动补偿与成像快速算法  

Fast algorithm for multiple-receiver synthetic aperture sonar imaging and sixdegrees-of-freedom motion compensation

作　　者：田振[1] 钟何平[1] 唐劲松[1] TIAN Zhen;ZHONG Heping;TANG Jinsong(College of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《华中科技大学学报（自然科学版）》2024年第3期28-34,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金青年基金资助项目(61901503)。

摘　　要：针对多子阵合成孔径声纳(SAS)六自由度运动误差补偿及逐点运动补偿算法效率低的问题,提出一种能够快速补偿方位空不变六自由度运动误差的多子阵SAS运动补偿与成像算法.建立方位空不变六自由度运动误差存在情形下的多子阵SAS双根号形式距离历程,利用泰勒级数展开对双根号形式距离历程进行近似并保留至方位时间的四阶项,利用级数反演方法推导出严格解析的点目标响应二维谱,进而提出能够快速实现方位空不变六自由度运动误差补偿与高分辨成像的距离多普勒算法.仿真试验和实测数据成像表明了所提算法的有效性.For the issue of the six-degrees-of-freedom(SDOF)motion compensation(MOCO)and the low efficiency of the pointby-point MOCO algorithm,a fast MOCO and imaging range-Doppler(RD)algorithm was proposed for the multiple-receiver synthetic aperture sonar(SAS)with the azimuth-invariant SDOF motion errors.First,the double square root(DSR)form range history was established.Secondly,the DSR form range history was approximated and retained to the fourth-order terms of the azimuth time by the method of Taylor series expansion.On this basis,an analytical two-dimensional frequency spectrum of point target response was derived using the method of series reversion.Finally,the fast MOCO and imaging algorithm was proposed,which can realize the compensation of azimuth-invariant SDOF motion errors and high-resolution imaging synchronously.The results of simulations and accurate experiment data imaging indicate the effectiveness of the proposed algorithm.

关 键 词：合成孔径声纳 运动补偿 成像技术 距离多普勒算法 六自由度运动误差 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]