空间网状天线形面设计与静力分析
发布时间：2018-08-16 18:45
【摘要】：可展开网状反射面天线是卫星通讯、电子侦察、地球观测、陆地遥感和深空探测等航空及国防领域必不可少的关键设备之一。本文以可展开网状天线为研究对象,对其形面几何成形设计、索网结构预应力设计以及反射面静力学分析三个方面进行了如下研究：首先,依据工作频率设计要求获得索网反射面的,选择合适的球形参考面,生成索网拓扑连接,优化调整分段环的曲率,获得索网的节点坐标,将球形参考面的节点坐标和拓扑连接关系映射到抛物反射面,建立网状反射面的几何成形技术。其次,基于节点力平衡方程,利用线性代数独立空间基的思想,经过对索力大小进行二范数与无穷范数的拓展,将预张力设计问题转化为一个以独立线性空间基系数为优化变量的标准二次规划问题,形成形面误差小、预张力分布均匀的网状反射面天线预张力设计理论与方法。最后,采用刚度法和有限元法,建立网状反射面天线结构的非线性静力学分析模型,将非线性求解问题转化成无约束问题,采用信赖域法进行求解,结果表明提出静力学方法具有较好的可行性和实用性。
[Abstract]:Deployable mesh reflector antenna is one of the essential equipment in the fields of satellite communication, electronic reconnaissance, Earth observation, land remote sensing and deep space exploration. In this paper, we take the deployable mesh antenna as the research object, and do the following three aspects: the geometric shaping design of the shape plane, the prestressed design of the cable net structure and the static analysis of the reflector: firstly, According to the requirements of working frequency design, the suitable spherical reference plane is selected, the topological connection of cable network is generated, the curvature of segment ring is adjusted optimally, and the node coordinates of cable net are obtained. The nodal coordinate and topological connection of the spherical reference plane are mapped to the parabolic reflector, and the geometric shaping technique of the mesh reflector is established. Secondly, based on the nodal force balance equation, by using the idea of linear algebraic independent space basis, the cable force is extended by two norm and infinite norm. The pretension design problem is transformed into a standard quadratic programming problem in which the independent linear spatial basis coefficient is taken as the optimization variable to form the theory and method of the pre-tension design of the mesh reflector antenna with small shape error and uniform pretension distribution. Finally, the nonlinear static analysis model of the reticulated reflector antenna structure is established by using the stiffness method and the finite element method. The nonlinear solution problem is transformed into an unconstrained one, and the trust region method is used to solve the problem. The results show that the static method is feasible and practical.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.27
本文编号：2186851
[Abstract]:Deployable mesh reflector antenna is one of the essential equipment in the fields of satellite communication, electronic reconnaissance, Earth observation, land remote sensing and deep space exploration. In this paper, we take the deployable mesh antenna as the research object, and do the following three aspects: the geometric shaping design of the shape plane, the prestressed design of the cable net structure and the static analysis of the reflector: firstly, According to the requirements of working frequency design, the suitable spherical reference plane is selected, the topological connection of cable network is generated, the curvature of segment ring is adjusted optimally, and the node coordinates of cable net are obtained. The nodal coordinate and topological connection of the spherical reference plane are mapped to the parabolic reflector, and the geometric shaping technique of the mesh reflector is established. Secondly, based on the nodal force balance equation, by using the idea of linear algebraic independent space basis, the cable force is extended by two norm and infinite norm. The pretension design problem is transformed into a standard quadratic programming problem in which the independent linear spatial basis coefficient is taken as the optimization variable to form the theory and method of the pre-tension design of the mesh reflector antenna with small shape error and uniform pretension distribution. Finally, the nonlinear static analysis model of the reticulated reflector antenna structure is established by using the stiffness method and the finite element method. The nonlinear solution problem is transformed into an unconstrained one, and the trust region method is used to solve the problem. The results show that the static method is feasible and practical.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.27
【参考文献】
相关期刊论文 前1条
1 阎春平;李志军;刘飞;;ANSYS的索膜结构找形系统研究[J];重庆建筑大学学报;2008年06期
，本文编号：2186851
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