Method for predicting influence of vibration deformation on electric performance of array antenna

An array antenna and prediction method technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the inability to truly reflect the antenna structure error, and achieve the effect of ensuring no damage and a simple process

Inactive Publication Date: 2013-01-23
XIDIAN UNIV
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Problems solved by technology

In the existing research, the mechanical aspects mainly focus on the research on the influence of random vibration on the mechanical properties of the antenna structure. When calculating the influence of random errors on th...

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  • Method for predicting influence of vibration deformation on electric performance of array antenna
  • Method for predicting influence of vibration deformation on electric performance of array antenna
  • Method for predicting influence of vibration deformation on electric performance of array antenna

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] refer to figure 1 As shown, the method for predicting the impact of vibration deformation on the electrical performance of the array antenna of the present invention, the steps are as follows:

[0046] Step 1, determine the geometric model file of the array antenna

[0047]According to the structural parameters and material properties of the array antenna, the geometric model parameters of the array antenna are determined. The structural parameters of the array antenna include the parameters of the cold plate, the radiation element, the T / R component and the array frame, and the material properties of the array antenna include the elasticity Modulus, Poisson's ratio, and density.

[0048] Step two, build its finite element model in ANSYS

[0049] The finite element model is constructed in ANSYS, the structural element type of the cold plate an...

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Abstract

The invention discloses a method for predicting influence of vibration deformation on electric performance of an array antenna. The method comprises the following steps of: 1) determining a geometric model file of the array antenna; 2) establishing a finite element model of the array antenna in ANSYS; 3) presetting an acceleration power spectrum, calculating random vibration deformation, and extracting position offset of each radiation unit; 4) calculating a pattern function of the array antenna; and 5) judging whether the pattern function satisfies design requirements. According to the conventional method, whether the structure strength of the antenna satisfies the requirement is analyzed according to the acceleration power spectrum, and the electrical performance cannot be determined according to array plane deformation errors. The method provided by the invention can realize the prediction on the electrical performance of the antenna according to the offset caused by random vibration; the method provided by the invention is more succinct, can introduce the offset into an electromechanical coupling model to calculate the electrical performance, and does not need to repeat electromagnetic modeling according to the change of the offset; and the method provided by the invention is used for analyzing the influence of vibration on the antenna and finding main structural factors, thereby ensuring that the antenna is protected from being damaged, and the electrical performance of the antenna in a working state is improved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a method for predicting the influence of vibration deformation on the electrical performance of an array antenna. Background technique [0002] Array antenna technology is the latest technology being developed in recent years. The array antenna is an antenna that changes the shape of the pattern by controlling the feeding phase of the radiating elements in the array antenna. Controlling the phase can change the direction of the maximum value of the antenna pattern to achieve the purpose of beam scanning. In special cases, it is also possible to control the sidelobe level, the minimum position and the shape of the overall pattern. When the antenna is rotated mechanically, the inertia is large and the speed is slow. The array antenna overcomes this shortcoming, and the scanning speed of the beam is high. As the most advanced active phased array antenna in the array antenna, it ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王从思李兆普涛王伟康明魁王猛段宝岩黄进保宏王艳宋立伟李鹏李娜
Owner XIDIAN UNIV
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