反射面天线结构的多工况机电耦合优化

Mechatronic Optimization Design of Reflector Antennas under Multiple Load Conditions

根据反射面天线结构的设计特点和工作特性,在传统多工况离散变量优化设计的基础上,通过引入天线增益损失,建立了以天线质量或增益为优化目标、结构加权应变能为约束的机电耦合优化模型。通过对某反射面天线结构的结构优化,将本文方法与传统优化方法进行了对比分析。数值结果表明:采用传统优化方法即使增加天线结构刚度也未必能提高天线的电性能。而通过耦合优化设计,在容许的设计范围内,既能保证天线的电性能指标,又能满足结构的刚度要求。

According to the characteristics of reflector antenna design and its working conditions,a new discrete variable optimization model under multiple load conditions is developed. In the model,the gain of antenna is introduced to consider the relationship between electrical performance and deformation of antenna structures. In this model,the antenna weight or gain is adopted as the objective functions and the weighted compliance is used as the constraints. The proposed method is applied to the structural optimization design of a reflector antenna. The results show that traditional optimization methods can improve the stiffness of antenna structure,but can not increase their electrical performance. While in the allowed limitations,both the requirements for the electrical performance and structural stiffness of antenna structure can be satisfied with the proposed coupling optimization design.