Robust adjusting method of surface precision on cable network reflective surface based on finite element model correction

A cable-net reflecting surface, model correction technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as introducing errors

Inactive Publication Date: 2015-08-26
XIDIAN UNIV
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Problems solved by technology

[0003] Although the cable net reflector meets the accuracy requirements in the design stage, errors will inevitably be introduced in the subsequent manufacturing, installation, debugging, etc.

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  • Robust adjusting method of surface precision on cable network reflective surface based on finite element model correction
  • Robust adjusting method of surface precision on cable network reflective surface based on finite element model correction
  • Robust adjusting method of surface precision on cable network reflective surface based on finite element model correction

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Embodiment Construction

[0100] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0101] The present invention is based on the finite element model correction robust adjustment method of the surface accuracy of the cable net reflective surface, comprising the following steps:

[0102] Step 1: Establish a reference model of the reflective surface structure of the antenna wire network

[0103] According to the nominal value of the reflective surface design of the antenna cable network, the finite element model of the reflective surface structure of the antenna cable network is established, and the corresponding equilibrium state is obtained through static analysis. The finite element model is called the reference model. long Let k=1.

[0104] Step 2: Calculate the sensitivity matrix of the network node position with respect to the cable length Measure the position of each node on the reflective surface of the object

[...

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Abstract

The present invention discloses a robust adjusting method of surface precision on a cable network reflective surface based on finite element model correction. The method comprises: building a reference model of an antenna structure on a cable network reflective surface, calculating a sensitivity matrix relating to a cable length in a net surface node position, measuring a position of each node on an entity reflective surface, calculating a desired node displacement when a reflective node is adjusted to an optimal coinciding paraboloid, acquiring adjusting quantity of an optimal robust cable length, exerting the adjusting quantity to an entity reflective surface, measuring to obtain node position of entity reflective surface after being adjusted, simultaneously exerting adjusting quantity of an optimal robust cable length to the reference model, acquiring node position of the reflective surface after the reference mode being adjusted, and implementing correction to the reference model; and repeating the steps until the precision does not increase, that is, finishing robust adjustment for surface precision on an antenna cable network reflective surface. According to the present invention, the influence of error factors and robustness of the adjusting quantity are considered, which ensures astringency during the process of adjusting, and significantly increases the efficiency of reflector surface adjusting.

Description

technical field [0001] The invention relates to a method for designing a cable-net reflective surface, in particular to a method for adjusting the shape precision of a cable-net reflective surface. Background technique [0002] Antenna structures are widely used in many fields of national defense, military and national economy such as communication, navigation, positioning, radar, and radio astronomy. With the development of space technology and the needs of national defense construction, countries have more urgent needs for large space antennas. The use of cable-net reflector structure is the main trend in the development of large-aperture antennas, and it is also an important form of space-borne large-scale deployable antennas. The cable net reflective surface has the advantages of simple structure, light weight, easy to realize large diameter, and small folded volume. [0003] Although the cable-net reflector meets the accuracy requirements in the design stage, errors w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 杜敬利王腊梅张岳震张逸群杨东武李申
Owner XIDIAN UNIV
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