Phased array radar antenna back frame lightweight method

Abstract

The invention discloses a phased array radar antenna back frame lightweight method, and the method comprises the steps: step 1, building a back frame lightweight reliability model through employing an interval-probability uncertainty measurement model based on the actual measurement parameters of a phased array radar antenna back frame; step 2, based on an equivalent model principle, according to a displacement function of the antenna back frame in the back frame lightweight reliability model, calculating the reliability and displacement constraint conditions when the maximum value of the displacement of the antenna back frame does not exceed a displacement threshold; and step 3, calculating a maximum probability failure point of a displacement constraint condition after Lagrange change under a preset condition by adopting iterative operation, and calculating an optimal solution of the back frame lightweight reliability model according to the maximum probability failure point so as to determine a phased array radar antenna lightweight reliability parameter. According to the technical scheme of the invention, the problem that the precise probability model of the phased array radar antenna back frame is difficult to obtain is solved, and the calculation amount in the reliability optimization process is greatly reduced.

Description

technical field [0001] The present application relates to the technical field of phased array radar, in particular, to a method for reducing the weight of a phased array radar antenna back frame. Background technique [0002] Phased array radar is widely used in important fields such as long-range early warning and high maneuvering target tracking. It is a complex electromechanical coupling multidisciplinary system. The normal work has played a decisive role. Due to the influence of uncertain factors such as service environment (wind load, ice and snow load), structural size, and installation deviation, the deformation of the phased array radar antenna back frame will cause changes in the flatness of the radar surface, which in turn will cause the deterioration of the electrical performance of the antenna, making There is a large deviation in the detection of the target. [0003] In order to avoid the influence of these uncertain factors, the surface flatness of the phased...

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Problems solved by technology

Therefore, it is difficult to obtain an accurate probability model to describe the uncertain parameters of phased array radar installation and normal operation

[0007] 2. Due to the multi-layer nesting in the traditional reliability optimization method, not only the amount of calculation is very huge, but also when the reliability optimization is performed with the weight reduction of the back frame as the objective function, it is difficult to obtain an accurate probability model, and The algorithm is complex and there are many influencing factors, which often lead to the inability to obtain the final solution, which in turn affects the efficiency of phased array radar antenna design

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