中国空间科学技术2024，Vol.44Issue(4)：20-28,9.DOI:10.16708/j.cnki.1000-758X.2024.0054
基于LS-SVM的精确星光折射导航观测模型
Precise starlight refraction navigation observation model based on LS-SVM
摘要
Abstract
The precise observation model for stellar refraction navigation using the least squares support vector machine(LS-SVM)is introduced.The process involves high fidelity simulations of stellar refraction via ray tracing,considering changes of atmospheric parameters with altitude,to determine the nonlinear mapping between true altitude and refraction angle.The LS-SVM algorithm is applied to fit this relationship accurately,creating a precise model for refracted apparent height.Simulations show the model achieves high precision,with an average absolute error of 0.986 m.When integrated into a stellar navigation system,it significantly enhances navigation accuracy,reducing the average positioning error to 130.7 m and velocity error to 0.147 9 m/s,thereby validating the effectiveness of the modeling approach.This approach is significant for the high-precision study of autonomous navigation using stellar refraction.关键词
星光折射导航/观测模型/光线追迹/LS-SVM/机器学习Key words
stellar refraction navigation/observation model/ray tracing/LS-SVM/machine learning分类
航空航天引用本文复制引用
颜旭,王鼎杰,张洪波,杨行,包为民..基于LS-SVM的精确星光折射导航观测模型[J].中国空间科学技术,2024,44(4):20-28,9.基金项目
国家自然科学基金(92371203) （92371203）
