CAJ | 학술논문

基于光谱红移天文自主导航思路以及天文学领域求解红移值的方法，提出一种用小波分析和密度估计相结合的方法测飞行器红移值，进而求解速度的测速导航方法。首先采用小波变换滤除噪声并进行光谱归一化，然后采用整体阈值和局部阈值相结合的方法，提取特征谱线，用密度估计法求出红移值，最后结合天文测角信息，计算出飞行器相对于惯性坐标系的速度。采用实测的太阳光谱数据，进行了红移模拟与解算。实验证明该方法在高信噪比的情况下，计算速度快，求解结果精度高达96％，为基于光谱红移的天文导航提供一种新的速度计算方法。
기우광보홍이천문자주도항사로이급천문학영역구해홍이치적방법，제출일충용소파분석화밀도고계상결합적방법측비행기홍이치，진이구해속도적측속도항방법。수선채용소파변환려제조성병진행광보귀일화，연후채용정체역치화국부역치상결합적방법，제취특정보선，용밀도고계법구출홍이치，최후결합천문측각신식，계산출비행기상대우관성좌표계적속도。채용실측적태양광보수거，진행료홍이모의여해산。실험증명해방법재고신조비적정황하，계산속도쾌，구해결과정도고체96％，위기우광보홍이적천문도항제공일충신적속도계산방법。
Based on idea of spectrum redshift astronomical autonomous navigation and method for astron-omy solving a redshift, presents a velocity celestial navigation method, which measures a vehicle redshifts u-sing the method of wavelet analysis combined with density estimation, and solves the vehicle’ s speed.First, wavelet transform is used to filter the noise and normalize spectrum.Then the characteristic spectral lines are extracted by combining the global threshold and local threshold, and the redshift value is calculated using den-sity estimation method.Finally combining with the astronomical angle information, the speed of the vehicle rel-ative to inertial coordinate system is calculated.Using the observed data of the solar spectrum, simulation and calculation of the redshift are conducted.The experiments prove that in the high SNR, the method has features of fast calculation, high precision of solving results, the accuracy rate reached 96%, and provides a new speed calculation method for celestial navigation based on spectral redshift.