大型桁架面天线的机电耦合优化设计

大型桁架面天线的机电耦合优化设计

内容简介：该文针对桁架面天线结构优化设计中的机电分离问题,将天线表面的微小变形表示为口径场的相位变化,得到包含结构因素的天线远场耦合计算公式,通过实验验证了该耦合公式的有效性和正确性.利用该公式将电性能指标引入传统的天线结构优化中,建立了以天线重量或电性能为优化目标,以结构强度和多种电性能变化量为约束的机电耦合优化模型,可以在天线结构设计过程中直接考察天线的主要电性能(包括增益、副瓣、波瓣宽度、指向精度等),同时避免了单一使用天线面精度的预估电性能的不足.通过某8 m天线的仿真结果表明了该耦合优化模型的优点.

Abstract：for the problem of electromechanical in the optimization design of reflector antennas with truss support structures, microscopic distortion of reflector surface is introduced in the formula of antenna's far field patterns by phase difference, and the coupling formula of reflector antennas' far field patterns is given. Results of verification experiment show that the coupling formula is accurate and efficient. By the coupling formula, electrical parameter could be included in the antenna structure optimization design. A mechatronic optimization design model of reflector antennas with truss support structures is developed ,which adopts antenna weight or gain as the optimization objective, and the structure strength and various electrical parameters as constraint conditions. So the main electrical parameters(include gain, side lobe, beam width and pointing accuracy) could be considered during structure optimization design, and the limitation of estimate gain only by surface precision is conquered. Finally the proposed optimization model is applied to an 8 meters antenna with good results.

作者：李鹏, 杨东武, 王伟, 郑飞,

关键词：面天线, 机电耦合, 优化模型, 桁架结构,