利用波导不变量进行运动单线阵的无源测距测速

发布时间：2018-03-09 17:20

本文选题：不变量　切入点：距变率　出处：《声学学报》2017年06期 　论文类型：期刊论文

【摘要】：为克服单线阵难以无源测距、测速的缺点,提出了利用目标辐射低频声场干涉结构和波导不变量的运动单线阵无源测距、测速方法。定义了运动目标的距离距变率比(目标距离与距离变化率的比值),并利用与目标辐射声场的时间-频率干涉结构和波导不变量相关的变量来表征距离距变率比。根据此定义,通过对目标辐射声场的时间-频率干涉结构图进行Radon变换等处理,实现对距离距变率比的估计。利用所估计的距离距变率比,结合平台速度、目标方位角和目标航向角实现对目标距离和速度的同时估计。仿真实验验证了所提方法在测距、测速时的正确性和有效性。结果表明:所提方法在目标航向角较大时有较高的距离、速度估计精度;同时,目标方位估计误差越小,所提方法的距离、速度估计精度越高。
[Abstract]:In order to overcome the difficulty of single line array passive ranging, speed of the shortcomings, proposed the use of target radiation low-frequency sound field interference structure and the waveguide invariant motion single array passive ranging, measurement methods. The definition of the moving target distance variable ratio (target range and range rate ratio), and the use of acoustic radiation and target time variable frequency interference structure and waveguide invariant related to the characterization of distance change rate ratio. According to this definition, the sound field on the radiated interference time frequency Radon transform processing structure, realize the distance estimation with variable rate ratio. Using the estimated distance variable ratio, combined with the platform speed. Target azimuth angle and heading angle estimation of target distance and speed at the same time. Simulation results show the proposed method in the distance, the correctness and validity of measurement. The results show that the proposed method in When the target course angle is larger, there is a higher distance and speed estimation precision. At the same time, the smaller the error of the target azimuth estimation, the higher the distance and velocity estimation precision of the proposed method.

【作者单位】：海军装备研究院;中国科学院声学研究所声场声信息国家重点实验室;西北工业大学;
【基金】：国家自然科学基金项目(11404406) 声场声信息国家重点实验室开放课题研究基金项目(SKLA201702)资助
【分类号】：TB56

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