Estimation of positions of local narrow-band sources on a ship hull usinga vertical antenna array

Abstract

A method for estimation of positions of local narrow-band sources on a moving ship, allowing one to identify the mechanisms making the greatest contribution to its sound pressure level, is proposed in the paper. The actuality of this problem is related to strengthening the requirements imposed on the sound pressure level of ships because of ecological and other requirements. The method is based on space-time filtering of the signal received by the elements of a vertical antenna array. The ship is supposed to move straightly and uniformly at a short distance from the array; the track parameters are supposed to be known. The results of the method testing with the use of the data obtained in sea experiment are presented in the paper. The testing has shown that the source localizing precision is close to the theoretically achievable one. An analysis of the method error is performed in a wide frequency range using numerical modeling.