基于惯导系统的多接收子阵SAS运动补偿

Motion compensation of multiple-receiver synthetic aperture sonar based on high-precision inertial navigation system

建立了利用惯导系统解算运动误差的通用模型,提出了在非停走停模式下的多接收子阵合成孔径声呐逐点运动补偿算法,解决了惯导系统数据与SAS数据融合问题.通过仿真分析了进动误差、侧摆与升沉误差和角度误差三类运动误差对成像质量的影响.对海试试验数据的成像处理表明:采用本文算法可有效改善成像质量,从而验证了提出的运动误差解算方法与运动补偿算法的有效性.

To solve the problem that the inertial navigation system data is difficult to be used directly in synthetic aperture sonar(SAS) imaging,a model for solving the motion errors was established,using the inertial navigation system,and a point-by-point motion compensation algorithm for multiple-receiver SAS in the non-stop-hop-stop mode was proposed.And the problem of fusion of inertial navigation system data and SAS data was solved.Then,the effects of three types of motion errors,surge errors,sway and heave errors and angle errors,on the imaging were analyzed through simulation.Finally,the sea trial data imaging processing shows that the proposed algorithm can improve the imaging quality,which verifies the effectiveness of the proposed the method of solving the motion errors and motion compensation algorithm.