基于波导不变量的目标运动参数估计及被动测距  

Moving target parameter estimation and passive ranging based on waveguide invariant theory

作　　者：余赟 惠俊英 殷敬伟 惠娟 王自娟 

机构地区：[1]哈尔滨工程大学水声技术国家级重点实验室,哈尔滨150001

出　　处：《声学学报》2011年第3期258-264,共7页Acta Acustica

基　　金：水声技术国防科技重点实验室基金(9140C2001010801;9140C2002100802);声呐技术国防科技重点实验室开放基金(kf1001)资助项目

摘　　要：结合波导不变量的概念推导了中近程目标的干涉条纹方程,它表明在浅海声场中此干涉条纹为一族类双曲线。采用Hough变换对LOFAR图和方位-时间历程进行处理,可以估计反映环境信息的波导不变量β、航向角(?)以及最近通过距离和航速比r_0/v。仿真研究和海试数据分析均表明,低频声场确实存在稳定的干涉结构,结合图像处理手段进行参数估计有较高的估计精度。基于双阵元模型可以进行被动测距,仿真研究表明该算法有较高的定位精度和较好的稳健性。The interference striation equation of the target in intermediate or short range has been derived combining with the concept of waveguide invariant,indicating that the striations are a family of quasi-hyperbolas in the shallow water.The waveguide invariantβ,which reflects the environmental information,the heading angleφand ro/v,which is the ratio of the range of the closest approach point to the target velocity,can be estimated by processing the LOFARgram and time-bearing display using Hough transform.Both the simulation and sea-trial data analysis results show that stable interference structure of the low-frequency sound field can be observed and high accurate parameter estimation for moving target can be obtained by adopting a means of image processing.Passive ranging could be achieved based on the double elements model,and the simulation results show that the algorithm has higher positioning accuracy and better robustness.

关 键 词：目标运动参数估计 被动测距 不变量 波导 HOUGH变换 干涉条纹 近程目标 浅海声场 

分 类 号：P733.2[天文地球—物理海洋学]