Mechatronics Design Method for 65m Aperture Large Reflector Antenna Structure

Abstract

The invention discloses an electromechanical integration design method of a 65m-aperture large-size reflector antenna, mainly aiming at solving the problem in electromechanical integration in large-size antenna design. The electromechanical integration design method comprises the following steps of: obtaining node displacement information after a reflector is distorted on the basis of finite element analysis of an antenna structure; designing a relation between coordinates and coordinate spatial positions after the reflector is distorted according to a node theory, and calculating theoretical coordinates and displacement of centroid points of triangular units; calculating optical path difference of the centroid points of the triangular units and phase errors on the corresponding aperture; projecting the units onto the aperture and calculating far-zone electric field distribution to obtain electrical performance parameters; building an optimization model by taking the structural parameters of the antenna as design variables and optimization of the electrical performance parameter of the antenna as a target; and solving the optimization model by adopting a sequential quadratic programming method to obtain an optimum mechanical electromagnetic comprehensive design scheme, so as to realize the electromechanical integration design of the reflector antenna. The electromechanical integration design method can be used for guiding the structural design of the large-size reflector antenna, and the analysis and the evaluation of the electromechanical comprehensive performance of the antenna under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to an electromechanical integration design method for a 65m-caliber large-scale reflector antenna structure, which is used to guide the structural design of a 65m-caliber large-scale antenna so that its mechanical and electrical properties are fully optimized. Background technique [0002] With the development of radar communication, deep space exploration and radio astronomy, the reflector antenna is developing in the direction of high frequency band and large aperture. Large reflector antennas are typical mechatronic equipment, and their mechanical and electrical properties influence and restrict each other. In engineering, electrical engineers propose mechanical structure design requirements, while structural engineers can only assign the design accuracy of each component based on experience. As a result, there are two situations. One is that the latter has exhauste...

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Problems solved by technology

This method only assumes that the deformation of the reflecting surface satisfies a certain trigonometric function distribution, but it is difficult to use a specific function to give the structural deformation in practice.

At the same time, the comprehensive analysis of the electromechanical performance of this method is based on the assumption of the shape of the structural deformation, which cannot reflect the real influence relationship between the structural deformation of the antenna and the electrical performance of the antenna.

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