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A Simultaneous Design Method of Surface Accuracy and Tension State of Cable Net Reflector Antenna

A technology of a cable-net reflector and a design method, applied in the field of cable-net reflector antenna structures, can solve problems such as errors, difficulties in cable-net reflector antenna design, and existing principles.

Active Publication Date: 2017-04-05
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the design of the cable-net reflector antenna is very difficult
First of all, since the surface of the cable net reflector is spliced ​​by the triangular facets of the cable net, there is a principle error

Method used

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  • A Simultaneous Design Method of Surface Accuracy and Tension State of Cable Net Reflector Antenna
  • A Simultaneous Design Method of Surface Accuracy and Tension State of Cable Net Reflector Antenna
  • A Simultaneous Design Method of Surface Accuracy and Tension State of Cable Net Reflector Antenna

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example

[0176] Taking the AstroMesh cable net reflector antenna as an example, the parameters of the antenna are: diameter 10m, focal length of the upper surface 6m, offset distance 6m, focal length of the lower surface 40m, antenna height 1.2m, number of main cable segments 10, upper and lower mesh The total number of cable units is 288, and the total number of vertical traction cables is 85. The cross section of the cable is circular with a diameter of 1.4mm, and the cross section of the truss is a hollow tube with an inner diameter of 14mm and an outer diameter of 15.2mm. image 3 is the finite element model of the cable-net reflector antenna, Figure 4 It is the pure cable net part, and the material parameters of each part are shown in Table 1.

[0177] Table 1 Material parameters of each part of the antenna structure

[0178]

[0179] When adopting the method of the present invention to carry out the simultaneous design of shape surface accuracy and tension state, the iterat...

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Abstract

The invention relates to a cable net reflecting surface antenna surface accuracy and tension state simultaneous design method which is characterized by at least including the steps of firstly, determining an initial balance reference configuration, namely the configuration when k=0, marking the corresponding node position as X<(0)>, and marking a cable section lofting length as L0<(0)>; secondly, determining the node displacement Us<(k)> required by the cable net during the kth iteration; thirdly, on the basis of the kth balance, determining the sensitivity matrix T / L0 of the cable section tension to the cable length and the sensitivity matrix X / L0 of the node position to the cable length during the kth iteration; fourthly, using a optimization model to solve the kth cable length correction amount; fifthly, correcting the cable section lofting length to be L0<(k+1)>=L0<(0)>+delta L0<(k)> after the kth iteration; sixthly repeating the process until the given convergence condition is satisfied. By the method, cable net tension is allowed to be even while the antenna surface accuracy is guaranteed.

Description

technical field [0001] The invention relates to a cable-net reflector antenna structure, in particular to a simultaneous design method for the shape accuracy and tension state of the cable-net reflector antenna. Background technique [0002] Antenna structures are widely used in many fields of national defense and national economy such as communication, navigation, positioning, radar, and radio astronomy. In order to detect weak signals or increase the transmission power, not only the aperture of the antenna is required to be large, but also the precision of the reflecting surface is required to be high. Usually the aperture of the antenna needs to reach more than ten meters, or even larger. In order to obtain the required electrical performance, the accuracy of the reflective surface of the antenna is often required to reach 1 / 50 of its working wavelength, which is very demanding. For example, for an antenna with a working frequency of 3GHz (S-band), the root mean square ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 杜敬利段宝岩马亚静杨东武张逸群杨癸庚丁波
Owner XIDIAN UNIV
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