基于焦平面技术的红外地球姿态敏感方法研究

Study of Attitude Detection Method Based on Infrared Focal Plane Technology

红外地平仪是很多空间飞行器平台姿态控制系统的关键姿态敏感设备,红外地球姿态敏感方法是其核心工作原理。针对传统红外地平仪基于光机扫描技术的红外地球姿态敏感方法,存在检测数据量小、姿态测量精度低的缺点,提出基于焦平面技术地球姿态敏感方法,阐述其算法原理和工作波段选择。由于大视场光学系统的引入,分析了光学系统的成像方式引起的姿态测量误差。实验表明提出的基于焦平面技术地球姿态敏感方法具备较高精度的姿态测量功能。

Infrared-earth-sensor is one of the key instruments of attitude control system on space craft, and the method of attitude detection is the essence for its performance. Traditional infrared-earth-sensor based on optical scanning technique, has a lot of disadvantage, especially its poor attitude detection sensitivity. A new method of attitude detection based on infrared focal plane array technology is introduced, and its operation principle and selection of wave bands are clarified. For the sake that a large-field optical lens adopted is substitutes for traditional optical scanner, its mode of imaging is discussed, and the attitude measuring error introduced by this mode of imaging is analyzed. By experiment, the method of attitude detection has more accurate result of attitude detection than that of traditional infrared-earth-sensor.