Optimization design method for the cable network of mesh reflector antennas considering space thermal effects
Optimization design method for the cable network of mesh reflector antennas considering space thermal effects
复制标题
考虑空间热效应的网状反射面天线电缆网络优化设计方法
DOI：
10.1016/j.ast.2019.105380
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发表时间：
2019
影响因子：
5.6
通讯作者：
Ma Xiaofei
中科院分区：
文献类型：
--
作者：
Nie Rui;He Baiyan;Yan Shaoze;Ma Xiaofei
网状反射面天线具有重量轻、口径大、精度高、刚度高等特点，广泛应用于航天卫星。索力与网格面形状密切相关，索力与网格面形状密切相关，索网的找形与优化设计在天线设计中起着至关重要的作用。目前的方法通常忽略热效应，这是合理的环境温度。由于空间热载荷的影响，天线的形状误差与初始形状误差相差很大，因此研究和减小热载荷对天线形状误差的影响是十分必要的。在轨主动形状调整远未达到预期，而发射前的初步调整也受到可调电缆（张紧带）数量和工程师经验的限制。在这种情况下，我们提出了一个形状发现和设计优化方法的网状反射面天线的电缆网络考虑空间热效应。该方法在设计阶段就充分考虑了拉索的热变形和几何非线性，减轻了发射前因热误差而进行形状调整的负担。由于采用了全部索代替可调索的优化方法，面形精度的提高比形状调整法更为明显。本文的工作为索网的优化设计和在轨形状误差的最小化提供了新的思路和方法。
The mesh reflector antenna is widely used in space satellites for its characteristics of lightweight, large aperture, high precision, and high stiffness. As the form of mesh surface is heavily depended on cable forces and vice versa, the form finding and optimization design of cable networks play an essential role in antenna design. The present methods usually neglect the thermal effects, which is reasonable for ambient temperature. While space thermal loads cause significant variations from the original form finding state, it is essential to investigate and minimize the antenna's on-orbit shape errors caused by the thermal effects. The active shape adjustment on-orbit is far from anticipated, while the preliminary adjustment before launch is also limited by the number of adjustable cables (tension ties) and the engineer's experiences. Under these circumstances, we propose a form finding and design optimization approach for the cable network of mesh reflector antennas considering space thermal effects. In this approach, the cable's thermal deformation and geometric nonlinearity are fully considered at the design stage, and the burden of shape adjustment for thermal errors before launch can be relieved. As all cables instead of adjustable cables are optimized, the improvement of surface accuracy is more obvious than the shape adjustment method. Our work provides a new idea and approach for the optimization design of cable networks and the minimization of on-orbit shape errors.