A fast target positioning method based on observation points at different times on a single aircraft track

Abstract

The invention provides a rapid target positioning method based on observation points at different time on a single airplane flight path. A ground control station communicates with an airborne self-driving instrument through a wireless data transmission link to control an unmanned aerial vehicle to fly; in the flying process of the unmanned aerial vehicle, a airborne is transmitted to an image ground station in real time through an image transmission link; the image ground station conducts calculation according to positions of target points in an image, and the target position is estimated through a rapid target positioning algorithm in cooperation with the positions and postures of the unmanned aerial vehicle and the cloud deck rotation angle information. By means of the rapid target positioning method, the defect that the position of a target point in a coordinate system of the unmanned aerial vehicle cannot be precisely obtained is overcome, and the application range of target positioning is greatly broadened; meanwhile, accuracy of target detection can be effectively improved through multi-point cooperative positioning of the unmanned aerial vehicle, the defects of single-point and single-sensor work are improved, and reliability and fault tolerance of system work are improved.

Description

technical field [0001] The invention belongs to the technical field of unmanned aerial vehicles, and in particular relates to a rapid target positioning method based on observation points at different times on a single aircraft track. Background technique [0002] Unmanned aerial vehicles (UAVs) are increasingly used in maritime emergency search and range wreckage search, such as MH370 and missile wreckage search. In order to further improve the effectiveness of UAVs in performing search and positioning tasks, it is necessary to study the problem of rapid target positioning of UAVs. Regarding the problem of rapid target positioning of UAVs, the defects of existing technologies are mainly manifested in the following aspects: [0003] On the one hand, the positioning method generally adopted by unmanned reconnaissance aircraft is single-station angle measurement and ranging positioning method. In the actual use process, several difficult problems have been exposed. The specif...

AI Technical Summary

Problems solved by technology

[0003] On the one hand, the positioning method generally adopted by unmanned reconnaissance aircraft is single-station angle measurement and ranging positioning method. In the actual use process, several difficult problems have been exposed. The specific performance is as follows: (1) The target positioning process has obvious limitations

The existing system structure of the UAV has two necessary constraints on the aircraft in the target tracking and positioning phase, that is, hovering in the tracking phase and overhead during positioning, but from the perspective of safety, it is almost impossible in the modern high-tech battlefield

(2) Insufficient continuous positioning capability for multiple targets

Under special circumstances, the unmanned reconnaissance aircraft system needs to perform positioning and calibration of multiple targets. Generally, it uses the simple accumulation of multiple single-target positioning and calibration tasks in a row, which is generally time-consuming, low in efficiency, and high in risk.

(3) The positioning accuracy is not high

However, the calculation method is cumbersome, the ranging error is large, the approximate elevation of the target needs to be known in advance, and the positioning accuracy is not high

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