Torpedo homing beam sharpening method

Abstract

The invention relates to a torpedo homing beam sharpening method which can effectively improve resolving capability of a torpedo on a plurality of targets in different positions in space. The method is characterized by aiming at a torpedo homing acoustic base array. Through selecting different weighting coefficients for array element received signals of the base array to perform weighted summation, two wave beams are formed on the same direction in the space at the same time, and one beam is narrow in main lobe and high in side lobe, and the other beam is wide in main lobe and low in side lobe, respectively realizing to reduce beam main lobe and restrain beam side lobe. A combined processing of weighting corresponding products by using the two beam signals with different main lobe and side lobe characteristics and envelope, and the side lobe is recued while further sharpening the beam main lobe, so as to obtain a sharpened beam signal with low side lobe, thereby improving position resolving capability of the beam. The method is low in calculated amount, good in robustness, and good in adaptation capability. The method is especially suitable to be used in application environment where the number of space signal sources is unknown or each signal source has relatively strong correlation. The method has good engineering practicality, and can improve multi-target spatial position resolving capability of a torpedo.

Description

technical field [0001] The invention relates to a torpedo self-guiding beam sharpening method for effectively improving the azimuth resolution capability of torpedo targets, belonging to the technical field of torpedo acoustic self-guiding, and applicable to precise orientation of torpedo self-guiding targets, multi-target resolution, fine target feature recognition and the like. Background technique [0002] With the rapid development of underwater acoustic countermeasure technology in modern naval warfare, the combat environment of torpedoes is becoming increasingly complex. On the one hand, multiple targets or decoys may appear in the working sector of the torpedo acoustic homing system at the same time, making torpedo homing face a multi-target environment. On the other hand, torpedoes usually not only need to identify the true and false targets, but also need to extract the multi-bright spot characteristics of the acoustic reflection of different parts of the large-scale...

AI Technical Summary

Problems solved by technology

However, this method is only suitable for a single target environment, and for a multi-target environment, its beam sharpening and target azimuth resolution capabilities have no obvious advantages

That is to say, for the case where there is only one target, this method can form a sharp beam in the direction of the target to accurately indicate the spatial orientation of the target; but for the case where there are two or more targets at the same time, it is difficult for this method to distinguish each target spatial orientation

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