Cable network antenna manufacturing error sensitivity analysis method based on proxy model

Abstract

The invention belongs to the field of structural parameter sensitivity analysis, and particularly relates to a cable network antenna manufacturing error sensitivity analysis method based on an agent model, which comprises the following steps of: classifying and merging manufacturing error variables according to structural symmetry characteristics; initial sampling is carried out on the manufacturing error variables, and the corresponding antenna precision is calculated; constructing a Kriging agent model based on the current sample point, and simulating a function relationship between a manufacturing error and antenna precision; based on the current agent model, calculating a sensitivity index by using a global sensitivity analysis strategy; adding a new sample point based on a dynamic point adding strategy, updating the Kriging agent model and calculating a new sensitivity index; calculating a weighted relative error of the sensitivity indexes of two adjacent steps; if the weighted relative error converges, the analysis process is ended; otherwise, continuing to add points and updating the proxy model. The sensitivity of different manufacturing errors in the cable network antenna can be accurately and efficiently obtained, screening of key factors is facilitated, and a foundation is laid for subsequent antenna structure design.

Description

technical field [0001] The invention belongs to the field of structural parameter sensitivity analysis, and in particular relates to a method for analyzing the sensitivity of cable-net antenna manufacturing errors based on a proxy model, which is used for screening important factors affecting antenna accuracy and providing technical support for antenna structure design. Background technique [0002] Antenna system is a kind of special electromechanical equipment with the electromagnetic performance of electromagnetic signal acquisition, transmission and processing as the goal, and the mechanical structure as the carrier. The structural factors often restrict the realization of the electrical performance. However, the design requirements of large aperture, high frequency band, and high gain make the influence of structural factors on the surface accuracy of cable-net antennas more and more serious, and the requirements for antenna design indicators are becoming more and more s...

AI Technical Summary

Problems solved by technology

However, how to determine the convergence criterion of the iterative process of adding points to the sequence is an important issue. If the convergence state is not determined accurately, it will often lead to insufficient precision of the proxy model and inaccurate sensitivity indicators; or the precision of the proxy model will exceed the actual demand, resulting in a waste of computing resources.

None of the current convergence criteria for proxy models takes into account the convergence of the sensitivity index constructed by the proxy model, and cannot meet the two requirements of accuracy and efficiency at the same time.

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