充气天线制作及测试方法研究

Construction and Measurement Method Research of an Inflatable Antenna

分析设计了一个充气可展开天线,得到初始曲面和裁剪片样式.制作了高精度的裁剪、拼接模板,并用于研制3.2 m口径天线样机.通过加工的天线调节装置,将反射器与支撑结构组装在一起.对索张力的两种调节方法进行了比较分析,最终采用张力弹簧调节装置.利用照相测量系统对反射面进行反复调节,使天线达到了较高的形面精度.

An inflatable antenna is analyzed and designed,initial shape surface and cutting-pattern of inflatable reflector are obtained.High precision cutting module and seaming module are manufactured, which are used to develop the 3.2 m diameter antenna prototype.By a series of manufactured adjustment devices,inflatable antenna is installed to rigid support structure.Two kinds of adjust methods for cable tensional force arc compared and analyzed,and finally spring adjust device is adopted.Non-contact photogrammetry measurement system is used to measure the inflatable reflector with repeated adjustment.A measurement method featured by departing target with 5 parts for the large diameter inflatable antenna is found after repeated contrast.Finally a high shape precision of antenna reflector is achieved.The measurement results are analyzed to identify the deviation and an improved method is proposed.These efforts can be referred for design and experiment on high-precision inflatable antenna.