单元构架式抛物面天线张紧绳索多层设计方法

星载抛物面天线在轨运行时由于姿态调整或环境因素变化，可能产生振动，从而降低其工作性能。为了减弱振动的影响，需采取加装张紧绳索的方法来提升天线刚度。提出了一种新型张紧绳索多层设计方法，通过将抛物面天线划分为多层，调整各层绳索的张紧力，从而提高天线结构刚度，同时尽量降低张紧力引起的形面误差。为了验证所提方法的有效性，建立了天线的有限元模型。在此基础上进行了有限元分析，研究了不同张紧力参数配置下的结构刚度和形面误差，并以提升结构刚度的同时降低张紧力引起的形面误差为目标，对张紧力参数进行了优化设计。为了提高计算效率，采用响应面法建立代理模型参与优化迭代计算。采用非劣排序遗传算法（NSGA-Ⅱ）完成优化迭代计算，优化后的张紧力参数使天线的性能得到了进一步的提升，为构架式可展开抛物面天线的设计提供理论指导。 

Multi-layerdesign method of tension rope for paraboloid antenna

Satellite-borne paraboloid antenna may vibrate during orbit operation due to attitude adjustment or environmental factors, thus reducing its performance. In order to reduce the influence of vibration, it is necessary to add tension rope to enhance the antenna stiffness. Therefore, a new multi-layer design method of tension rope is proposed. In this method, the paraboloid antenna is divided into multiple layers and the tension of each layer is adjusted to improve the structural stiffness of the antenna and reduce the shape error caused by the tension force as far as possible. In order to verify the effectiveness of the above method, the finite element model of the antenna is established. On this basis, the finite element analysis is carried out, and the structural stiffness and shape error under different tension parameters are studied. In order to improve the stiffness of the structure and reduce the shape error caused by the tension force, the tension parameters are optimized. In order to improve the efficiency of optimization calculation, the response surface method is used to establish a surrogate model to participate in the optimization iterative calculation. Non-inferior sorting genetic algorithm (NSGA-Ⅱ) is used to complete the iterative calculation. The optimized tension parameters further improve the performance of the antenna. This research can provide theoretical guidance for the design of truss deployable paraboloid antenna.