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Around moon satellite dual spindle antenna direct land control method

A pointing control and antenna pair technology, which is applied to control without feedback, suitable for antennas on movable objects, guidance devices for space navigation vehicles, etc. It can solve problems such as complex control logic, simplify the calculation process, and ensure accuracy. Effect

Active Publication Date: 2009-08-19
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, the dual-axis antenna pointing control of domestic satellites adopts the control method of program tracking. The target orbit is a segmented orbit obtained by ground processing, and the satellite searches for the target after scanning. The control logic of this method is complicated. A feedback device is required, which can feed back target information in real time, and perform closed-loop pointing control of the antenna through the calculation of the on-board control law

Method used

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  • Around moon satellite dual spindle antenna direct land control method
  • Around moon satellite dual spindle antenna direct land control method
  • Around moon satellite dual spindle antenna direct land control method

Examples

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Embodiment Construction

[0020] Such as figure 1 As shown, the biaxial antenna pointing control flow chart of the present invention, the specific steps are as follows:

[0021] (1) First inject t into the star from the ground 0 (t 0 It can be the ephemeris information of the earth at any time) corresponding to the ephemeris information calculated on the ground, and calculate the ephemeris of the earth in the equatorial inertial system at any time t according to the extrapolation algorithm. The vector E of the moon center pointing to the earth center in the moon center equatorial inertial system i Calculation formula:

[0022] u e = u l 0 + u · l 0 ( t - t 0 ) + π ...

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Abstract

The invention discloses a method for controlling the pointing to the ground of the coaxial antenna of a lunar satellite. The method includes the following steps: first, according to earth ephemeris information transmitted from the ground to the satellite and a transformation matrix from an equatorial inertia system to a coordinate system of a satellite orbit, the ephemeris of the earth in the coordinate system in the satellite orbit in any moment is calculated ; second, according to the calculated ephemeris, visible earth region of the satellite is calculated and within the visible region, a pointing in the coordinate system of the satellite orbit of vector about the satellite pointing to geometer is calculated; the pointing in the coordinate system of the satellite orbit of vector about the satellite pointing to geometer is calculated in a compensated way to obtain the pointing in the coordinate system of the satellite body of vector about the satellite pointing to geometer; according to the pointing in the coordinate system of the satellite body of vector about the satellite pointing to geometer, an antenna target angle is calculated; a final instruction angle is obtained after an antenna zero deviation is compensated and the final instruction angle is sent to an antenna drive mechanism which can drive the antenna to point to the earth. The invention overcomes the defects of the prior art and adopts a tracking mode of a simple ring-opening program to meet the requirements for pointing accuracy.

Description

technical field [0001] The invention relates to a method for controlling the pointing to the ground of a dual-axis antenna used in the orbiting phase of a satellite orbiting the moon. Background technique [0002] The dual-axis antenna is an important part of the moon-circling satellite to complete the download of payload information. The control system needs to control the rotation of the antenna along two axes and obtain the position information of the antenna to ensure the accuracy of the antenna pointing to the ground. [0003] Dual-axis antennas have been researched and applied on foreign relay satellites and communication satellites. For example, the KSA satellite antenna positioning system on Japan's EST-VI satellite, and the DRRS satellite antenna positioning system developed by Matra Marconi are both dual-axis antennas. control. Its control methods include: PI control, LQG plus feedforward control, LQG / LTR method, fuzzy PID and adaptive control and other methods. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D3/10B64G1/24H01Q1/28
Inventor 李铁寿叶培建黄江川宗红王友萍于国庆王淑一王大轶王寨韩冬
Owner BEIJING INST OF CONTROL ENG
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