摘要
为实现高频弱信号通讯,空间网状可展开天线的尺寸越来越大,且对形面精度要求也越来越高,因此与天线形面精度相关的许多课题引起了宇航界的极大关注,特别是在如何提高索网式天线反射面精度调整的效率,用较少次数的测量和调整,使天线反射面的精度达到指标要求方面需求更为迫切。利用有限元分析方法,针对环形桁架可展开天线形面精度调整中的问题,建立了基于影响系数矩阵的多目标的精度优化调整数学模型,并采用遗传算法求解,数值结果表明,此方法能够大幅度提高天线的形面调整效率,对工程应用具有指导意义。
The dimension of deployable antenna reflector of nets type is becoming bigger and bigger in order to realize the communication by high-frequency weak signal,and the requirement of its shape accuracy is becoming higher and higher.Therefore,the related subject has been brought into focus by the aerospace industry,especially the efficiency for improving the adjustment accuracy of cable nets type reflector,which is becoming urgent requirement to satisfy the accuracy target with less measurement and adjustment.Considering the problem existed in the accuracy adjustment of the antenna for annular truss,a multi-objective mathematical model for accuracy optimal adjustment based on influence coefficient matrix is established with nonlinear finite-element analytical method in it.Then genetic algorithms is adopted to obtain the result which numerical result shows that the adoption of the method may improve substantially the efficiency for adjusting shape of the antenna,which is significant for engineering applications.
出处
《机械设计与制造》
北大核心
2011年第6期123-125,共3页
Machinery Design & Manufacture
基金
国家自然科学基金项目资助(50875210)
关键词
环形桁架展开天线
耦合影响
形面精度调整
Annular truss deployable reflector
Coupling effect
Shape accuracy adjustment
