A method for determining the movement of a target in under water acoustics.

摘要

This process permits the determination of the movement of a target in acoustics under - marine by means of an antenna with sensors misaligned c1, c2 * * p, c3 provided with a central sensor c2 * * p. it consists in estimating the characteristics of speed vx, vy and position of the target x (t), y (t) relative to the antenna by means of an estimator of maximum likelihood, taking into account the differences in propagation times measured between the edges of the waves transmitted by the target and arriving on the sensors. The motion estimator is initialized by means of a state vector x initial determined from the values of the direction of the target signal of the media of each pair of sensors, during a determined number of measurements staggered in time. The action of the sector of the condition x takes place by taking into account the value of the site of the target with respect to the antenna. / p & & p & application: acoustic in marine -