Abstract
In the present article, an ultra-short baseline (USBL) combined location method based on three four-element stereo arrays is proposed. In order to solve the problem of the poor positioning effect of acoustic positioning under a high incident angle of signal, two kinds of four-element stereo arrays are designed, and the localization approach of the new array is given. At the same time, for the regular triangular pyramid array, a virtual array element is proposed to construct a planar cross array to improve the poor positioning effect of the regular triangular pyramid array at a low incident angle. This paper analyzes the positioning performance of three arrays. Combined with the traditional cross-planar array localization method, a set of positioning strategies to switch the two localization methods under different incident angles were designed. The switching thresholds of the two methods were analyzed by simulation. Simulation results show that the new arrays can locate stably at different incident angles and improve the overall positioning performance of the array.
Highlights
Rosa Ma Alsina-PagèsWith the development of marine technology, the demand for deep-sea operation is increasing
The localization performance of the two stereo arrays under different half-included angles was analyzed, and the appropriate half-included angle was selected to compare the performance with the traditional cross array
Aiming at the poor localization performance of the regular triangular pyramid array at a low incident angle, a positioning method of a virtual four primitive plane array is proposed by using vector synthesis
Summary
With the development of marine technology, the demand for deep-sea operation is increasing. The regular triangular pyramid array solves the problem of poor localization performance a large incident angle, it reduces the localization of the four-element planaratarray is poor or even unable to locate the signal when the performance at a small incident angle. The algorithms the stereo improve the positioning accuracy under proposed in this paper to of improve the array localization performance when the signal has a high angle, but there is atime, problem of on poor accuracypyramid when thearray, signala has a incident angle. TheInsame time, based on the regular triangular pyramid array, a four-element view of the poor positioning accuracy of the plane array under a high plane array isincident virtualized to improving the poor localization effect at a low incident angle. (2) Aimingalgorithm at the problem of poor positioning accuracy of regular triangular pyramid array a lowthree incident angle, a virtual quaternion plane array algorithm proposed.
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