VICTS antenna four-point tracking algorithm

A tracking algorithm and four-point technology, applied in the field of satellite communication antennas, can solve problems such as easy tracking errors and low efficiency, and achieve the effects of good engineering practicability, improved speed and tracking efficiency, and improved accuracy and tracking efficiency.

Active Publication Date: 2019-03-26
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The VICTS antenna scans the beam through mechanical rotation. The general tracking algorithm is step tracking, which is inefficient and easy to mistrack when the attitude changes quickly.

Method used

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  • VICTS antenna four-point tracking algorithm
  • VICTS antenna four-point tracking algorithm
  • VICTS antenna four-point tracking algorithm

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 1 As shown, a kind of VICTS antenna four-point tracking algorithm provided in this embodiment comprises the following steps:

[0046] Step S101, performing a pattern test on the VICTS antenna to obtain the far-field pattern of the antenna whose beam center changes according to the pitch angle;

[0047] Step S102, performing beam modeling according to the antenna far-field pattern in step S101;

[0048] Such as figure 2 As shown, for the antenna gain f, pitch angle θ, and azimuth φ of the antenna far-field pattern, formula (1) is used to model the elliptical paraboloid, and the beam parameters a and b under different beam center pitch angles are obtained;

[0049]

[0050] Among them, θ is the elevation angle, φ is the azimuth angle, and f is the antenna gain.

[0051] The beam parameters a and b at different beam center elevation angles are obtained by using the least square method, specifically:

[0052] First, the beam is modeled in the azimuth ...

Embodiment 2

[0074] In step S201, the pattern test of the VICTS antenna is carried out in the microwave anechoic chamber, and the pattern of the beam center changing with the elevation angle of 0.5° is obtained.

[0075] Step S202, using the gain data with a gain drop of 1db in each directional graph, modeling the directional graph with an elliptical parabola, and using the least squares method to obtain a model result with a variance of less than 0.01; when the pitch angle is 45° and the azimuth angle is 20° The beam pattern of is:

[0076]

[0077] Step S203, rotate the center of the beam to four equal gain points A, B, C, and D, obtain the receiving level values ​​of the four equal gain points, and calculate the level difference, the level of point A minus point C The difference is -4.72, the level difference between point B minus point D is -6.17, and then the difference in direction angle and pitch angle of the target direction relative to the initial beam center is obtained by for...

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Abstract

The invention belongs to the technical field of satellite communication antennas, and particularly relates to a VICTS antenna four-point tracking algorithm, which comprises the following steps: firstly, carrying out directional diagram testing on a VICTS antenna to obtain an antenna far-field directional diagram of which the beam center is changed according to a pitch angle; Performing beam modeling according to the antenna far-field directional diagram; And finally, solving a difference value of the collected four-point level, and solving an azimuth angle difference value and a pitch angle difference value of the target direction relative to the initial beam center by utilizing beam modeling. According to the invention, target tracking can be carried out on the satellite of which the beamcenter is at any pitch angle and the angle difference between the target position and the beam center is less than 2 degrees, and the tracking precision and tracking efficiency of the VICTS antenna are improved.

Description

technical field [0001] The invention belongs to the technical field of satellite communication antennas, in particular to a four-point tracking algorithm for a VICTS antenna. Background technique [0002] VICTS (Variable Tilt Angle Continuous Section Array) antenna is a new type of low-profile antenna. The antenna rotates through the one-dimensional plane of each functional layer to realize the adjustment and matching of beam azimuth, elevation two-dimensional scanning and polarization angle. The antenna feed is simple, the longitudinal section of the whole machine is low, it has the characteristics of high gain, flexible beam scanning, high mobility, etc., and has broad application prospects in the field of satellite mobile communication. [0003] The beam of the satellite-in-motion antenna will always deviate from the target direction when the carrier is moving. At this time, a tracking algorithm is needed to adjust the beam to the direction of the satellite. The traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 雷雪刘铮徐志坚高峻陈国虎李天鹏胡浩明张志勇黄宇鹏
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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