High Precision Underwater Active Acoustic Positioning Technology Based on Distance Information

The underwater active acoustic positioning technology uses the geometric relationship between the target and the array to calculate the target position. This method needs the capability of accurately measuring the distance between the target and the receiving array, which is an indirect measurement. When the ranging error occurs, it is affected by the error transfer rule, and the positioning precision is low. In order to improve the precision of active acoustic positioning, a high precision active localization algorithm is proposed. In this algorithm, a distance vector model containing environmental parameters was established, and the similarity function was constructed by obtaining the L-p norm of distance vector and copy vector, so as to realize the 3D positioning of the target in the observation area. In order to verify the performance of the algorithm, Monte Carlo simulation is carried out to analyze the distribution of positioning errors. Simulation results show that the proposed method directly matches the distance vector, and the positioning precision is better than the conventional positioning technology, although the positioning precision is also affected by the ranging accuracy.