卫星天线热真空变形测量

Distortion Measurement of Satellite Antenna in Thermal Vacuum

针对在真空环境中进行高低温测量的难点和特点,提出了采用数字近景摄影测量技术在热真空中对卫星天线面板的高低温变形进行测量。成功地利用2台经过保护的专业像机组成双相机摄影测量系统,完成了天线热真空变形测量,解决了传统的测量手段无法在真空中进行测量的难题,型面变形测量精度达到0.1mm,满足了试验要求。

The techniques of digital close-range photogrammetry were successfully used in the high-low temperature deformation measurement of satellite antenna＇s reflector in thermal vacuum, and prob-lems of traditional measuring methods that can not be conducted in the vacuum environment were over-came. Excitingly, the measuring precision of the new method with two 8-megapixel digital cameras con-tained in custom-made pressurized canisters could reach 0. 1mm, and could satisfy the designing require-ments of products.