Array element failure correction method based on improved whale optimization algorithm

An optimization algorithm and correction method technology, applied in the field of array antennas, can solve the problems of slow convergence speed and convergence accuracy need to be further improved, and achieve the effect of improving convergence speed and convergence accuracy, enhancing global convergence, and enriching individual information.

Active Publication Date: 2020-09-22
ANHUI BOWEI CHANGAN ELECTRONICS
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Problems solved by technology

However, the above existing methods have problems such as local optimum and slow convergence speed, and the convergence accuracy needs to be further improved.

Method used

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  • Array element failure correction method based on improved whale optimization algorithm
  • Array element failure correction method based on improved whale optimization algorithm
  • Array element failure correction method based on improved whale optimization algorithm

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Embodiment Construction

[0047]The present invention will be described in detail below in conjunction with specific embodiments.

[0048] The present invention provides an array element failure correction method based on an improved whale optimization algorithm, comprising the following steps:

[0049] Step 1: For an equidistant uniform linear array of N elements, assuming that each array element is isotropic, the normalized array factor of the array antenna is:

[0050]

[0051] In the formula, I n is the excitation current of the nth array element; k 1 is the wave number, k 1 =2π / λ, λ is the space free wavelength; j is the imaginary number unit, d is the distance between the array antenna elements at equal intervals, u=cosθ, θ is the angle between the ray direction and the array axis;

[0052] Combined with the maximum sidelobe level and beam width of the antenna, the fitness function is constructed as:

[0053] Fitness=max[AF(θ)]+k 2 ·max(0,|BW d -BW c |-0.05)

[0054] where k 2 is the ...

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Abstract

The invention belongs to the field of array antennas, and particularly relates to an array element failure correction method based on an improved whale optimization algorithm, which comprises the following steps: step 1, establishing a mathematical model for a linear array antenna, and constructing a fitness function according to the maximum sidelobe level and the beam width of the antenna; step 2to step 8; and step 9, outputting the optimal individual position. The method has the advantages that the whale optimization algorithm is improved, on the basis of the whale optimization algorithm, convergence of the algorithm is accelerated through the self-adaptive weight, the algorithm is combined with the differential evolution algorithm, population individual information is enriched, and theglobal convergence of the optimization algorithm is enhanced. Compared with intelligent optimization algorithms such as heredity and particle swarm, the convergence speed and convergence precision ofthe algorithm are improved. The improved whale optimization algorithm is used for optimizing the remaining normal array elements of the array antenna, failure correction of an array antenna directional diagram is rapidly achieved in a short time, and the performance of the array antenna is guaranteed to the maximum extent.

Description

technical field [0001] The invention belongs to the field of array antennas, in particular to an array element failure correction method based on an improved whale optimization algorithm. Background technique [0002] The array antenna is an electromagnetic wave radiation source formed by arranging and stimulating several antenna elements in a certain way. It has the characteristics of high gain, multiple beams, low sidelobes, and fast scanning, and is widely used in modern radar systems. With the intelligentization and multi-functionalization of radar systems, the array antenna structure is becoming more and more complex, and the number of antenna elements can reach thousands, which increases the probability of array element failure. Due to factors such as device aging and external physical damage, the antenna array unit will fail, resulting in an increase in the antenna sidelobe level, a widening of the beam, and a decrease in antenna gain, which will affect the detection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06N3/00
CPCG06F30/20G06N3/006Y02D30/70
Inventor 孟宪猛蔡翠翠
Owner ANHUI BOWEI CHANGAN ELECTRONICS
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