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Two-station bearings-only localization fuzzy region method based on confidence ellipse

A confidence ellipse and fuzzy area technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of low positioning accuracy, low positioning reliability, and inability to reflect the distribution characteristics of positioning errors

Active Publication Date: 2016-04-13
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in view of the current existing quadrilateral positioning fuzzy area method based on cross positioning, the positioning accuracy is not high, the positioning reliability is low, and the positioning error distribution characteristics cannot be reflected. A new positioning method - a two-station azimuth-only positioning method for fuzzy areas based on confidence ellipses, which effectively improves the positioning accuracy and location reliability of positioning fuzzy areas

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  • Two-station bearings-only localization fuzzy region method based on confidence ellipse
  • Two-station bearings-only localization fuzzy region method based on confidence ellipse
  • Two-station bearings-only localization fuzzy region method based on confidence ellipse

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Embodiment Construction

[0054] figure 1 It is a schematic diagram of a quadrilateral positioning fuzzy area method based on cross positioning in the background technology. Take direction finding station O 1 and direction finding station O 2 The midpoint of the connecting line is the coordinate origin, the straight line where the two direction-finding stations are located is the x-axis, the right direction is the positive direction of the x-axis, and the vertical direction of the connecting line between the two direction-finding stations is the y-axis to establish a plane Cartesian coordinate system. R is the distance between two direction-finding stations, then two direction-finding stations O 1 (-R / 2,0) and O 2 The position of (R / 2,0) is known, O 3 (x,y) is a target radiation source that needs to be positioned. Considering the positioning error introduced by inaccurate direction finding, the azimuth measurements of the two direction finding stations all obey the normal distribution, Δθ 1 is th...

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Abstract

The invention discloses a two-station bearings-only localization fuzzy region method based on a confidence ellipse. A technical problem to be solved is to improve positional accuracy and positioning confidence of a positioning fuzzy region. The technical scheme is that: establishing a positioning fuzzy region model based on the confidence ellipse, and carrying out experiments to solve, to obtain that the accurate value range of a direction-finding error coefficient k in the confidence ellipse positioning fuzzy region is1.75-2.5; determining the confidence ellipse positioning fuzzy region, and determining the confidence coefficient that a target radiation source O3 is in the confidence ellipse positioning fuzzy region. Using the method, on one hand, requirement of engineering practice on positioning confidence coefficient can be satisfied, and the method has relatively good positioning confidence level, and on the other hand, compared with an existing positioning fuzzy region method, the method has relatively high positioning precision, and can show distribution condition of positioning errors.

Description

technical field [0001] The invention relates to the field of passive positioning, and in particular refers to positioning a target point by adopting a positioning fuzzy area method based on a confidence ellipse under the background of pure orientation of two stations. Background technique [0002] In modern warfare, fighting for the initiative in the electromagnetic field is the core of fighting for the initiative in the battlefield. Locating radiation sources can help improve the performance of precision strike weapons and provide a strong guarantee for the ultimate destruction of the enemy. Therefore, how to improve the positioning accuracy of the threat target and how to improve the positioning efficiency are of great significance. [0003] The passive detection system itself does not emit electromagnetic waves. It mainly combines time difference positioning and antenna direction to measure the angle and obtain the target geographic location. Its advantages are wide effec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/00
CPCG01S5/00
Inventor 陈洪辉陈皖玉刁联旺郑晓坤刘俊先陈涛
Owner NAT UNIV OF DEFENSE TECH