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Aircraft positioning system and method based on single station

A positioning system and aircraft technology, applied to satellite radio beacon positioning systems, radio wave measurement systems, instruments, etc., can solve problems such as complex system structure, high cost, and direction-finding errors

Active Publication Date: 2018-10-19
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, this method will cause direction-finding errors due to complex nonlinear changes in the signal during the movement of the aircraft itself and attitude changes. At the same time, an external radiation source is required to establish a correction model, resulting in a complex system structure and high cost.

Method used

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  • Aircraft positioning system and method based on single station
  • Aircraft positioning system and method based on single station
  • Aircraft positioning system and method based on single station

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Embodiment Construction

[0066] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0067] The invention is based on a single-site aircraft positioning system, reference Figure 4 As shown, it includes: a phase measurement module 1, an inertial gyroscope 2, a satellite navigation and positioning system 3, a processing module 4, and a sequential circuit 5. The phase measurement module 1 includes: two receiving antennas 11, two radio frequency modules 12, two intermediate frequency modules 13 and a phase detector 14, and the components are connected in sequence.

[0068] Two receiving antennas form a short baseline. Taking 300MHz to 2GHz frequency signal positioning as an example, the short baseline can be 3.4m long.

[0069] The direction of the short baseline is perpendicular to the axis of the aircraft fuselage.

[0070] During the signal positioning process, the aircraft makes a non-straight line, such as an S-shaped...

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Abstract

The invention discloses an aircraft positioning system and method based on a single station, wherein the positioning system comprises an aircraft flight control module, a phase measuring module, an inertial gyroscope, a satellite navigation positioning module and a processing module. The phase measuring module comprises two antennas at different positions of the aircraft. The aircraft flight control module is configured to control the aircraft to fly along a nonlinear line. The processing module includes a target signal azimuth angle calculation unit and a target signal distance calculation unit. The target signal distance calculation unit calculates the distance from the aircraft to a target signal based on the target signal azimuth angle acquired by the aircraft and the aircraft positionmeasured by the satellite navigation positioning module. The system and method do not need to consider the Doppler frequency offset effect of a received signal caused by the motion of the aircraft, can realize high-precision signal source positioning in combination with existing hardware devices of the aircraft under the premise of only a single short baseline, and has a great application value.

Description

Technical field [0001] The present invention relates to the technical field of signal positioning, in particular to a single-site-based aircraft positioning method. Background technique [0002] Moving single-station short baseline passive positioning technology is a high-precision signal positioning technology that can be applied to small aircraft. This technology uses a single-station short baseline to measure the phase difference of the received signal under the condition that the aircraft is flying in an S-shaped maneuver. At the same time, it combines the aircraft general equipment to obtain the aircraft maneuvering angle and the aircraft position information, and uses the positioning algorithm to calculate the signal ambiguity to obtain the signal azimuth and The distance information completes the signal direction finding. [0003] Traditional signal positioning technology can be divided into multiple stations and single stations. Although the multi-station positioning tech...

Claims

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Application Information

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IPC IPC(8): G01S19/47
CPCG01S19/47
Inventor 傅随道曹振新
Owner SOUTHEAST UNIV
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