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Method for controlling pitching motion of radar three-axis stable rotary table

A technology of pitching motion and three-axis stabilization, which is applied in the direction of using feedback control, radio wave reflection/reradiation, and utilization of reradiation, etc. It can solve the problem of limiting the application range of large antennas, increasing the weight of equipment, and increasing the load of the lower stable platform, etc. question

Active Publication Date: 2020-12-01
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Abstract
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AI Technical Summary

Problems solved by technology

This technology needs to change the inherent structural form of the three-axis stabilized turntable, increase the weight of the equipment, and at the same time increase the load of the lower stable platform, which limits the application range of large antennas

Method used

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  • Method for controlling pitching motion of radar three-axis stable rotary table
  • Method for controlling pitching motion of radar three-axis stable rotary table
  • Method for controlling pitching motion of radar three-axis stable rotary table

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Embodiment Construction

[0012] The present invention will be further explained in conjunction with the accompanying drawings and embodiments.

[0013] Step 1: Subtract the given azimuth A of the position where the radar antenna needs to move in pitch and the heading angle H given by the ship compass equipment to obtain the angle A of the position where the radar antenna needs to move in pitch C , that is, the bank angle of the position where the antenna will perform pitching motion;

[0014] Step 2, at the sheer angle A C In terms of position, project the given elevation angle E that the antenna needs to pitch to the motion plane of the pitch frame (YOZ plane) and the motion plane of the roll frame (XOZ plane) of the stable turntable, respectively, to obtain θ P1 and θ R1 , whose expression is expressed as:

[0015] θ P1 =E·cosA C , θ R1 =E·sinA C

[0016] where θ P1 Indicates the pitch projection value of the pitch frame motion plane (YOZ plane), θ R1 Indicates the roll projection value of...

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Abstract

The invention relates to a method for controlling pitching motion of a radar three-axis stable rotary table. According to a given azimuth angle of a required pitching motion position of a radar antenna, a bow angle of the required pitching motion position of the radar antenna is calculated; a given elevation angle of required antenna motion at the position of the bow angle is projected to the movement plane of a pitching frame and the movement plane of the rolling frame of the stable rotary table respectively, a motion change angle (pitching projection value) of the pitching frame and a motionchange angle (rolling projection value) of the rolling frame are obtained; mathematical calculation is carried out on the motion change angle of the pitching frame and the motion change angle of therolling frame and the pitching angle and the rolling angle of a current ship sent by ship compass equipment, so that an input value of a pitching frame control loop and an input value of a rolling frame control loop of the radar three-axis stable rotary table can be obtained and input to the respective control loops to perform closed-loop control; and therefore, the pitching motion of the radar antenna at a given elevation angle in the given azimuth angle under the condition of ship swinging can be realized.

Description

technical field [0001] The invention belongs to the technical field of radar technology application. Background technique [0002] The radar three-axis stabilized turntable adopts a pitch frame and a roll frame with two axes perpendicular to each other to form a stable platform, and the two frames move around each other's axis; an azimuth frame with an axis perpendicular to the plane of the stable platform is supported on the stable platform, and the azimuth frame revolves around itself The axis rotates 360 degrees to form a turntable. The stable platform and the turntable are combined to form a three-axis stable turntable, which provides attitude stability in space for the radar antenna installed on the turntable. The use of three-axis stabilized platforms on space vehicles and ships helps the radar system to obtain a good spatial reference. The pitch frame, roll frame and azimuth frame in the three-axis stabilized turntable generally move independently and are not relate...

Claims

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Application Information

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IPC IPC(8): G01S13/68G01S7/40G05D3/12
CPCG01S13/685G01S7/4026G05D3/12G01S7/4034
Inventor 吕向阳李涛郭锐冯瑗瑗丁锋
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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