基于大气偏振光的载体姿态参数提取方法  

Attitude Parameter Extraction of Carrier Based on Atmospheric Polarized Light

作　　者：任建斌[1] 杨明[1] 宋妮[1] REN Jian-bin;YANG Ming;SONG Ni(School of Science,North University of China,Taiyuan 030051)

机构地区：[1]中北大学理学院,太原030051

出　　处：《导航与控制》2021年第4期41-48,共8页Navigation and Control

基　　金：山西省自然科学基金面上项目(编号:201801D121158);山西省自然科学基金青年项目(编号:201801D221040,201901D211227)。

摘　　要：大气偏振模式是地球自有属性,可为大气层内的生物和载体提供导航信息。提出一种利用大气偏振模式矢量性特征获取载体姿态参数的直接方法,首先利用图像法从单反相机获取的180°全天域灰度图中重建出大气偏振模式,然后对该模式进程进行分析和处理,确定出天空每个测量点的E-矢量信息,接着利用这些E-矢量建立载体的姿态变换矩阵,最后引入奇异值分解的经典方法最小化误差函数,获取到载体的姿态参数。该方法的有效性通过模拟飞行器控制台得以验证,最大解算偏差不超过0.5°。Being one of the intrinsic attributes of the earth,atmospheric polarization pattern could provide navigation clues for organisms and carriers travelling in the atmosphere.In this paper,a simplified method is proposed to obtain attitude parameters for carrier by virtue of the vector characteristics of atmospheric polarization pattern.Firstly,the pattern is reconstructed using the image method from the 180°omnidirectional gray image obtained by the SLR camera.Subsequently,it is analyzed and processed to determine the E-vector information of each measurement point in the sky,which is further used to establish the attitude transformation matrix of the carrier.Finally,the singular value decomposition is introduced to minimize the error function and obtain the attitude parameters of the carrier.The effectiveness of the method is tested through the simulative aircraft console,and the maximum error of solution is less than 0.5°.

关 键 词：偏振光 E-矢量模式 姿态 模糊聚类 奇异值分解 

分 类 号：P401[天文地球—大气物理学与大气环境]