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A method for calculating the pointing accuracy of a spaceborne deployable antenna system

An antenna system and pointing accuracy technology, applied in the field of satellite analysis and calculation, can solve problems such as antenna simulation or measurement on-orbit deployment, and achieve the effects of easy calculation parameters, universal applicability, and simple calculation methods

Active Publication Date: 2021-07-13
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

[0003] The spaceborne deployable antenna is a rootless tree system that is sent into space to operate. Unlike other antennas, its reflective surface can be indirectly installed on the star through multiple links. After the antenna is installed on the star, it cannot be simulated or measured in the ground test. Therefore, a pointing accuracy calculation method for a spaceborne deployable antenna system is needed to realize the system accuracy estimation after the satellite is installed

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  • A method for calculating the pointing accuracy of a spaceborne deployable antenna system
  • A method for calculating the pointing accuracy of a spaceborne deployable antenna system
  • A method for calculating the pointing accuracy of a spaceborne deployable antenna system

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[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] The deployable antenna system includes a satellite body 1, a feed source 2, and a reflection surface 7. The feed source 2 is fixedly installed on the satellite body 1, and the reflection surface 7 is connected to the satellite body through M cascaded deployment arms. Each deployment arm corresponds to a The deployment arm joint, the reflective surface is fixedly connected with the M-level deployment arm, the M-level deployment arm is connected to the M-1-stage deployment arm through the M-level deployment arm joint, and so on, and the second-level deployment arm is deployed through the second-stage deployment arm. The arm joint is connected to the 1st stage deployment arm, and the 1st stage deployment arm is connected to the satellite body through the 1st stage joint. Each joint has 1 degree of freedom, which is a one-dimension...

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Abstract

The present invention provides a method for calculating the pointing accuracy of a spaceborne deployable antenna system. The deployable antenna system includes a feed source and a reflector. The feed source is fixedly installed on the satellite body. Connecting to the satellite body, the method includes: (1), defining the feed source body coordinate system ΣF, each unfolding arm body coordinate system Σ1~ΣM, and the reflecting surface body coordinate system ΣA; (2), taking the reflecting surface as a reference, establishing an ideal The parabolic antenna system is used to obtain the theoretical pointing of the deployable antenna system; (3), the installation accuracy of the measurement feed and the first-stage deployment arm is calculated by the method of transfer matrix according to the inherent error transfer relationship of each component of the deployable antenna system The actual pointing of the deployable antenna system; the inherent error is the angle error after the deployment arm is deployed due to manufacturing tolerances; determine the actual pointing of the deployable antenna system; (4), compare the actual pointing of the deployable antenna system with the theoretical Pointing to get the pointing accuracy of the antenna system.

Description

technical field [0001] The invention belongs to the field of satellite analysis and calculation, and relates to a pointing accuracy calculation method of a space-borne deployable antenna system. Background technique [0002] With the rapid development of aerospace technology, the demand for large-aperture, high-gain antenna systems is becoming more and more urgent. The space-borne deployable antenna system is folded into the satellite body during launch, which can not only adapt to the effective carrying space of the rocket, but also has the function of autonomous deployment in orbit, so it has been widely used in various satellites. The space-borne deployable antenna system usually works in a higher frequency band, so the structural index and electrical performance index of the system are required to be stable and reliable. Therefore, the on-orbit working accuracy of the spaceborne deployable antenna system has become a key concern, and its pointing accuracy and other perf...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C15/00G01C1/00
Inventor 钟红仙薛碧洁印璞姜浩王轶博张磊夏永泉边炳秀
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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