空间充气可展抛物面天线反射面设计与精度分析

Analysis of the design and precision of an inflatable deployable parabolic reflector space antenna

空间充气可展抛物面天线由于其显著的优点正得到日益广泛的研发关注.该文提出了基于理想抛物面逆向分瓣裁切粘合成形的反射面设计法,分析了引入形面误差的因素,给出了形面误差参数定义,研究了反射面分瓣数、裁切逼近方式和数值网格划分等对形面误差的影响.分析了微重力、放置方式对形面精度的影响.论文所研究的内容对空间充气可展天线设计研究具有参考价值.

Inflatable deployable parabolic space antennas have received increasing attention from researchers due to their remarkable advantages. The authors proposed a process to form a reflective surface with an inverse cutting formation. A number of gores were designed that would form an ideal parabolic surface, flattened sequentially, cut, and then the seams were glued together inversely to form a whole reflector surface. The factors causing deviations from the expected ideal surface, that is, surface errors, were investigated thoroughly. Surface error parameters were carefully defined, such as the root mean squared （RMS） of variations in form accuracy, volume, and area. The influences of the number of gores, the fitting procedures and the number of discrete shapes were comprehensively evaluated. Finally, the effects on the precision of the stressed surface were analyzed with respect to the microgravity of the film, the spray-paint and the support structure. This work should be valuable in the design of inflated space antennas.