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An antenna beam pointing correction method based on warship pitch and roll integrated vector coordinate transformation

A technology of antenna beam and coordinate transformation, which is applied to the components of radio wave directors, direction finders using radio waves, etc., can solve the problems of not considering antenna errors, etc., and achieve the effect of strong operability

Active Publication Date: 2017-07-14
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These formulas described in the literature do not take into account the errors caused by the rotation of the antenna relative to the deck of the ship and the two-dimensional scanning of the radar antenna beam in azimuth and elevation to the beam pointing of modern radar antennas

Method used

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  • An antenna beam pointing correction method based on warship pitch and roll integrated vector coordinate transformation
  • An antenna beam pointing correction method based on warship pitch and roll integrated vector coordinate transformation
  • An antenna beam pointing correction method based on warship pitch and roll integrated vector coordinate transformation

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Embodiment Construction

[0025] In this example, electronically stabilized beam correction is performed on a group of antenna beam points, and the calculation results of the present invention are compared with CAD modeling and simulation data for verification.

[0026] Step 1: The antenna beam azimuth As and pitch direction Es under the antenna coordinates are known to be 35° and 45° respectively, the antenna elevation angle T=18°, the ship pitch angle P=12°, and the ship roll angle R= 20°, antenna rotation angle Ac=30°. as attached figure 1 As shown, the pitch angle 2 here refers to the angle between the bow and stern line 1 of the ship and the ground level, and the bow is positive on the horizontal plane; the roll angle 3 refers to the angle between the bow and stern line 1 of the ship relative to the ground level. Swing, the starboard droop is positive; as attached figure 2 As shown, the elevation angle 5 of the antenna array refers to the angle between the array surface and the vertical line 3 ...

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Abstract

The invention discloses a ship pitch and roll comprehensive vector coordinate transformation antenna beam pointing direction correcting method which is used for solving the problem of influences of ship swinging and antenna postures on the antenna beam pointing direction. The beam pointing direction in an antenna coordinate system can be rapidly corrected to the beam pointing direction in a geodetic coordinate system by building a mathematic model of relationships between the antenna beam pointing direction and the antenna postures and between the antenna beam pointing direction and the ship pitch and roll. By means of the method, the accuracy of the antenna beam pointing direction under the ship pitch and roll condition and the antenna rotating condition can be remarkably improved, and the method is simple, practicable and high in operability.

Description

technical field [0001] The invention belongs to the technical field of radar antennas, and relates to a correction method for warship pitch and roll comprehensive vector coordinate transformation antenna beam pointing. Background technique [0002] The current ship puts forward more and more stringent requirements on the weight of ship radar, and the traditional mechanically stabilized platform is heavy and expensive, which is greatly restricted in application. The ESP calculates the pointing angle of the radar beam on the geodetic coordinates to compensate for the beam pointing deviation caused by the ship's swing and the antenna attitude. The electronically stabilized platform avoids the bulky and expensive servo structure, so it has the advantages of light weight and strong adaptability. There have been many documents discussing the compensation method of the electronically stabilized platform. The document (Wang Youchao. Discussion on the transformation of ship pitch an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/12
CPCG01S3/12
Inventor 卢青丛友记黄彩华朱平
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND