基于超短基线声传感器阵的高速目标轨迹估计

doi:10.7527/S1000-6893.2019.22296

Abstract

Abstract: Aiming at the problem of low altitude and high speed flight target tracking, the time-frequency characteristics of a typical target noise signal are studied. Since the spectrum of the signal is wideband and is mainly distributed in the low frequency domain, this kind of targets is hard to track in the frequency domain. Considering the constrained layout space for the acoustic sensor arrays, a target tracking method based on the ultra short baseline arrays is proposed. All extreme points of the sound intensity in the ultra short baseline arrays are individually extracted to estimate the vertical line of the target motion trajectory. The moving direction of the target is estimated by calculating the multiplicative vectors of multiple vertical lines. The motion trajectory is obtained by the multiplane intersection method. Theoretical errors of the azimuth angle, pitch angle, and estimated moving trajectory are derived. To successfully estimate the trajectory, all the arrays should not be located on the same plane with that of the target trajectory. Simulation results show that when 4 ultra short baseline arrays are used, the average error of angle estimation is within 4°, and the relative error of position estimation is about 5%. The simulation results verified the proposed method.

Key words: acoustic arrays, flight path, time delay estimation, target tracking, ultra short baseline array

CLC Number:

V217
TB52

CHEN Zhaonan, SUN Ao, WANG Lei, YAN Xiaopeng. Trajectory estimation of high speed target based on ultra short baseline acoustic arrays[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(3): 322296-322296.

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Trajectory estimation of high speed target based on ultra short baseline acoustic arrays

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