Method for determining shape of large-scale flexible antenna in in-orbit zero-gravity state

A technology for flexible antennas and determination methods, applied to antenna radiation patterns, measuring devices, instruments, etc., can solve problems such as distortion of prediction results and low precision, and achieve great innovation and practical value

Active Publication Date: 2019-06-14
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology

However, at present, after the antenna model is corrected by using the thermal deformation measurement data in the simulated space environment in China, the accuracy of the on-orbit shape prediction

Method used

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  • Method for determining shape of large-scale flexible antenna in in-orbit zero-gravity state
  • Method for determining shape of large-scale flexible antenna in in-orbit zero-gravity state
  • Method for determining shape of large-scale flexible antenna in in-orbit zero-gravity state

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Embodiment Construction

[0059] The following is a specific implementation manner of the content of the present invention, and the content of the present invention will be further clarified through the specific implementation mode below. Of course, the following specific embodiments are described only to illustrate different aspects of the present invention, and should not be construed as limiting the scope of the present invention.

[0060] see figure 1 , figure 1 The method for determining the surface accuracy of a large flexible antenna in the zero-gravity state of the orbit is shown, and the measurement data processing flow includes the following:

[0061] (1) By simulating the thermal deformation measurement test of the space environment, the target point gathering P of the antenna shape surface in the non-unloading state of each temperature field working condition in the vacuum and low temperature environment is obtained 3i (X 3i ,Y 3i ,Z 3i ) relative to the antenna target point gathering ...

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Abstract

The invention discloses a method for determining the shape of a large-scale flexible antenna in an in-orbit zero-gravity state. The method for determining the shape of the large-scale flexible antennain the in-orbit zero-gravity state comprises the following steps that firstly, a thermal deformation normal displacement value of a cluster of antenna shape target points in a non-unloading state under various temperature field working conditions in a vacuum low-temperature environment relative to a cluster of antenna target points in a vacuum normal-temperature non-unloading state is obtained through a thermal deformation measurement test simulating a space environment; and then a cluster of antenna shape measurement points is superposed to obtain the cluster of the antenna shape target points in the unloading state under various temperature field working conditions; and then, the least square fitting method is adopted to obtain a zero-gravity fitting shape through cluster of coordinatepoints of the antenna shape in the zero-gravity unloading state of the antenna under various temperature field working conditions. According to the method for determining the shape of the large-scaleflexible antenna in the in-orbit zero-gravity state, the simulation result of the antenna zero gravity fitting shape antenna under high and low temperature working conditions can truly reflect the in-orbit actual running electrical performance index of the satellite-borne large flexible antenna.

Description

technical field [0001] The invention belongs to the technical field of parameter measurement of large-scale antennas in orbital zero-gravity state. Specifically, the invention relates to a method for determining the thermal deformation surface accuracy of space-borne large-scale flexible antennas based on photogrammetry technology in a vacuum and low-temperature environment. Simulate the thermal deformation measurement data in the space environment, obtain the on-orbit high and low temperature working conditions of the large-scale flexible antenna, and obtain the zero-gravity fitting shape of the antenna, and predict the real thermal deformation state of the antenna on-orbit, so as to ensure the space-borne large-scale flexible antenna on-orbit shape. The accuracy meets the design and use requirements. Background technique [0002] During the operation of the space-borne large-scale flexible antenna after deployment in orbit, the thermal deformation of the antenna due to tem...

Claims

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Application Information

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IPC IPC(8): G01B21/32G01R29/10G01R31/00
Inventor 张鹏嵩蒋山平杨林华张博伦王劭溥王丹艺张磊龚洁
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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