A fast interval analysis method for antenna electrical performance based on eigenorthogonal decomposition

Abstract

The invention relates to a fast interval analysis method for antenna electric performance based on eigenorthogonal decomposition. The method comprises the following steps: (1) determining an uncertainvariable x and an initial design space XI; (2) constructing sample point database; (3) calculating the response value corresponding to the initial sample points and constructing a measurement matrixA; 4) carrying out eigenorthogonal decomposition on that measurement matrix A to obtain an optimal basis matrix, and truncating the optimal basi matrix; (5) solving the expansion coefficient alpha n;(6) interpolating and fitting the sample point database and the expansion coefficient alpha n; 7) judging whether that numerical simulation model converges or not, if yes, executing step 9), otherwise, executing step 8); 8) selecting an update point, performing software simulation on that update point to obtain a response value, adding the update point to a sample point database, adding the obtained response value of the antenna electrical performance to a measurement matrix A, and turning to the step 4); (9) carrying out Monte Carlo simulation to obtain the corresponding statistical characteristics.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a fast analysis method for antenna electrical performance, in particular to a fast interval analysis method for antenna electrical performance based on characteristic orthogonal decomposition. Background technique [0002] In the manufacture of high-density phased array antennas, various manufacturing errors such as size errors, position errors, and material properties will inevitably occur, and these errors will lead to changes in the electrical properties of the antenna. The manufacturing error can be described as x=x 0 ±Δx, where x 0 is the nominal value, and Δx is the machining accuracy. x can be further expressed as x∈X I =[X l ,X u ], the uncertainty of the antenna performance is caused by uncertainty propagation, described as an interval variable y I =y c +y r Δ I , where y c for y I mean value. the y r for y I The deviation of the number of intervals relative...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the calculation amount of the existing antenna model is too large and the calculation efficiency is low during software simulation, and provides a method based on characteristic orthogonal decomposition The rapid interval analysis method of the electrical performance of the antenna can greatly reduce the calculation time and analyze the uncertainty of the antenna performance

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