Design of infrared measurement system for determining the relative position of inner-formation gravity satellite
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摘要: 为一种新的重力场测量方式内编队卫星设计了相对位置红外测量系统。为了实现内编队卫星系统中封闭空间内移动物体的相对位置测量，同时在满足测量精度的条件下实现对光压、电磁辐射等干扰力的抑制，提出了一系列适合该系统的特色设计。这些设计基于热-电-机一体化设计思想，主要包括：合适的腔体构型和相机布局，成像电路结构，动态循环的稳定成像热环境，delta 并联校正装置以及合理的交会定位策略。实验表明，通过上述设计，可获得信噪比良好的红外图像，能够高精度地解算出内卫星的相对位置，在满足抑制干扰力的同时实现了长时间连续精确测量。Abstract: An infrared measurement system was designed for relative position determination of inner-formation gravity satellite (IFGS), which was a new kind of spacecraft system to measure the Earth's gravity field. The process of determining the relative position between the moving inner-satellite and its cavity should be highly precise and without any non-gravitational disturbing forces such as light pressure, electromagnetic radiation and so on. The above requirement was handled through some novel designs which were based on the idea of thermal-electronic-mechanical integration technology. These designs include as follows: cavity configuration and cameras arrangement, layout of imaging circuits, a dynamic loop and stable thermal environment, a novel calibration equipment with delta mechanism and a suitable strategy of cross location. Though the above designs, experimental results show that infrared images with good signal noise ratio can be acquired, which are sufficient to determinate the accurate position of the inner-satellite via some smart image process algorithms. The integrated technology described in the paper provides a long-time precise measurement with the premise that disturbing forces be restrained.
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