A Correction Algorithm for Acoustic Localization Via Square Pyramid Array

An unattended laser target designator was designed to adapt the up-to-date requirement, with an acoustic array used to locate target preliminarily, its estimated results will be used to control imaging sensors for accomplishing accurate positioning. The feature of passive acoustic localization is estimation accuracy of directional parameters is higher than that of distance parameters. Because tangent of azimuth angle varies linearly with the ratio of the two plane coordinate values, we can search the optimal plane coordinate values in the vicinity of the first estimated results after getting estimation value of azimuth angle. We devised a correction algorithm to make optimal searching in an interval around the estimated results. The final optimal results are confirmed to make the error of location equations to be smallest in least-squares approach. This correction algorithm shows perfect performance in simulation experiments while getting precise directional estimation. Some enhanced methods are also mentioned to advance real time ability, robustness, and flexibility.

[1]  Edward J. Rothwell,et al.  Ultra-wideband/short-pulse radar for target identification and detection-laboratory study , 1995, Proceedings International Radar Conference.

[2]  Evangelos E. Milios,et al.  Acoustic tracking from closest point of approach time, amplitude, and frequency at spatially distributed sensors , 1990 .

[3]  Jürgen Altmann,et al.  Acoustic and seismic signals of heavy military vehicles for co-operative verification , 2004 .

[4]  NavalSurface WeaponsCenter.  Maneuvering Target Tracking Using Adaptive State Estimation , 1977 .

[5]  Cai Ke-Rong,et al.  Design of an unattended laser-target designator based on multi-sensor , 2009, 2009 9th International Conference on Electronic Measurement & Instruments.

[6]  Brian G. Ferguson,et al.  Broadband passive acoustic technique for target motion parameter estimation , 2000, IEEE Trans. Aerosp. Electron. Syst..

[7]  Michael A. Kolodny,et al.  Aircraft detection using unattended ground sensors , 2006, SPIE Defense + Commercial Sensing.

[8]  Richard Moose,et al.  Maneuvering Target Tracking Using Adaptive State Estimation , 1977, IEEE Transactions on Aerospace and Electronic Systems.

[9]  Nino Srour,et al.  Feature extraction and fusion of acoustic and seismic sensors for target identification , 1997, Defense, Security, and Sensing.

[10]  R. E. Hudson,et al.  Localization of short-range acoustic and seismic wideband sources: Algorithms and experiments , 2008 .

[11]  Jia-hao Deng,et al.  Accurate positioning based on acoustic and optical sensors , 2009, International Conference on Optical Instruments and Technology.

[12]  Gao Yong.  A directional algorithm of four-element acoustic array and optimization , 2009 .

[13]  F. M. Dommermuth,et al.  The estimation of target motion parameters from cpa time measurements in a field of acoustic sensors , 1988 .

[14]  F. Dommermuth,et al.  Estimating the trajectory of an accelerationless aircraft by means of a stationary acoustic sensor , 1984 .