A fast compensation method for the electrical performance of a deformed array antenna under dynamic load based on a least square method

Abstract

The invention discloses a fast compensation method for the electric performance of a deformed array antenna under a dynamic load based on a least square method. The method comprises the following steps: 1) according to geometric model parameters and material attributes of the array antenna, establishing a structural finite element model; 2) selecting the vibration mode and natural frequency of theantenna model according to the frequency distribution range of the dynamic load; 3) calculating compensation excitation current; 4) using the new excitation current to compensate the electrical performance of the deformed array antenna. The invention utilizes the mode superposition method to directly correlate the compensation excitation current of the deformed array antenna with the dynamic loadbased on the least square method. As long as the dynamic load in the service environment is known, the real-time compensation of the electrical performance of the antenna array can be realized. Thismethod can obviously improve the deterioration of antenna electrical performance caused by the external environment dynamic load without increasing the system weight and complexity. At the same time,the compensation efficiency is greatly improved. It is ensured that the electrical performance of the deformed array antenna can be compensated in time and work normally in various dynamic load environments.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a method for quickly compensating the electrical properties of deformed array antennas under dynamic loads based on the least square method. Background technique [0002] As a terminal sensor for receiving and transmitting electromagnetic wave signals, the antenna is an indispensable device for propagating radio waves. The radiation characteristic of the array antenna is different from that of the general element antenna, and the energy of the radiation field formed by it is relatively concentrated and has strong directivity. Therefore, it has the advantages of high reliability, multiple functions, strong detection and tracking capabilities, and good stealth performance. It has been widely used in the fields of radar, navigation, and electronic countermeasures, and has been installed on airborne, spaceborne, and vehicle-mounted platforms. [0003] The antenna array ...

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Problems solved by technology

[0006] In view of the above problems, the present invention utilizes the mode shape superposition method and based on the least square method to realize the rapid compensation of the electrical performance of the deformable array antenna under dynamic load, which can be used to solve the problem of low compensation efficiency of the existing least square method when only the dynamic load is known. problem, which is conducive to the real-time compensation of the electrical performance of deformable array antennas under dynamic loads

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