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红外地球敏感器是卫星姿态控制系统中的一个重要部件,基于光机扫描技术的传统红外地球敏感器存在体积大、功耗高、精度低的缺点,无法满足微小卫星对姿态敏感器的要求。针对以上不足,提出了一种基于红外焦平面成像技术的地球敏感器的实现方法及相应的地面标定测试方法。该设计的地球敏感器具有结构简单、体积小、功耗低的特点。从地球敏感器的工作原理出发,提出了整个敏感器构架,并完成整个系统的软硬件设计。在标定测试方法中建立了敏感器仿真测试模型,并搭建实验测试平台对敏感器其精度进行标定。测试结果表明此地球敏感器具有0.1°的测量精度,能很好地满足微小卫星姿态系统的精度要求。
The infrared earth sensor is an important component in the satellite attitude control system. The conventional infrared earth sensor based on the optical scanning technology has the disadvantages of large volume, high power consumption and low precision, which can not meet the requirements of the attitude sensor. In view of the above insufficiency, a method of earth sensor based on infrared focal plane imaging technology and corresponding ground calibration test method are proposed. The designed earth sensor has the advantages of simple structure, small size and low power consumption. Starting from the working principle of the earth sensor, the entire sensor architecture is proposed and the software and hardware design of the entire system is completed. In the calibration test method, a sensor simulation test model is established and an experimental test platform is set up to calibrate the sensor’s accuracy. The test results show that the earth sensor has a measurement accuracy of 0.1 °, which can well meet the precision requirements of the micro-satellite attitude system.