霍尔推力器在轨羽流图像诊断方法  

A method of image diagnosis for in-orbit Hall thruster plume

作　　者：胡俊锋[1] 杨鑫勇 仲小清[2] 黄涛[1] 魏立秋[1] 于达仁[1] 

机构地区：[1]哈尔滨工业大学先进动力研究所,哈尔滨150001 [2]中国空间技术研究院通信卫星事业部,北京100094

出　　处：《中国空间科学技术》2017年第5期47-53,共7页Chinese Space Science and Technology

基　　金：国家科学自然基金(51477035)

摘　　要：为便于霍尔推力器羽流在轨诊断测量,文章提出了一种基于光谱诊断衍生出来的图像诊断方法。首先对推力器羽流进行光学图像采集,然后提取出能够反映羽流不同谱段光强信息的红绿蓝三通道数据;同时结合相机成像原理分析,得到不同通道的像素点灰度值与羽流光谱强度的对应关系;并且基于光谱碰撞辐射模型,建立了羽流图像计算模型。研究结果表明,利用图像诊断方法计算得到的羽流区电子温度和离子密度分布规律均与探针试验结果相吻合,计算的相对不确定度分别约为20%和15%,说明了该诊断方法精度适中,具有较高的可靠性,适用于在轨诊断霍尔推力器羽流等离子体参数。An image diagnosis method based on the spectrum diagnosis was proposed to facilitate the in-orbit diagnosis measurement of Hall thruster plume.Firstly,the RGB data reflecting the spectral radiation intensity of different wavelength range was extracted from the plume image photographed by the camera.Based on the analysis of the camera imaging principle,the correspondence between the image gray value and spectral intensity was deduced.Then the plume image diagnosis model was established combined with the spectral collision radiation model.The experimental results show that the distribution of the electrontemperature and ion density in the plume region calculated by the image diagnosis method is in agreement with the results of the probe measurement.The relative uncertainty of the calculated results is about 20% and 15%.It is further proved that the diagnosis method,which has moderate precision and high reliability,is suitable for the in-orbit diagnosis measurement of Hall thruster plume parameters.

关 键 词：霍尔推力器 羽流 图像诊断 光谱辐射强度 灰度 

分 类 号：V439.2[航空宇航科学与技术—航空宇航推进理论与工程]