摘要
针对110m超大口径全可动高精度反射面天线自重与造价的问题,本文提出了一种全新的设计方案,与常规方案相比,自重、驱动功率与造价可分别降低1/2,2/3与1个量级.首先,提出了超轻的预应力索-桁结构代替传统笨重的刚梁背架结构.其次,提出了新型并联伺服机构代替传统的方位-俯仰扫描机构.再者,基于模块化的设计思想建立了与创新结构相适应的优化模型.最后,将提出的方案应用于数值算例和某26 m口径的实际天线中,得出的结果验证了方案与方法的正确性与有效性.同时,该方案对其他装备设计也有一定的参考价值.
Aiming at the problem of self-weight and cost of 110 m large full-steerable reflector antenna,a new design scheme is proposed.Compared with the conventional scheme,the self-weight,drive power and cost can be reduced by 1/2,2/3and 1 orders of magnitude.Firstly,an ultra-light prestressed cable-truss structure is proposed to replace the traditional rigid heavy rigid truss structure.Then,a novel parallel servo mechanism is proposed to replace the conventional Az-El scanning mechanism.Furthermore,an optimization model is established based on the modularized design.Finally,the new scheme is applied to the numerical examples and a practical antenna with a diameter of 26 m,and the results verify the feasible and effective of the scheme and the method.In addition,the design scheme is extensible and can be applied to the design of large structures and devices such as antennas,weapon mounts and large solar panels in other land,sea,air and space fields.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2017年第5期78-90,共13页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金重大项目(编号:51490660
51490661)
国家重点基础研究发展计划(编号:2015CB857100)资助
关键词
大型反射面天线
超轻天线结构
预应力索-桁结构
并联伺服驱动机构
模块化优化设计
large reflector antenna
ultra light antenna structure
prestressed cable truss structure
parallel servo drive mechanism
modular optimization design
