【摘要】 天文多普勒差分导航能够极大地抑制太阳光谱不稳定性造成的速度误差。但是,太阳自转会给天文多普勒差分测量带来一个微小慢变偏差,进而导致导航滤波器发散。针对这一问题,提出了一种能同时抵抗太阳自转和光谱不稳定性的天文多普勒差分方法。该方法建立了太阳自转造成的速度差分偏差模型,并将其引入到多普勒差分测量模型中。由于天文多普勒导航无法单独工作,需将其与X射线脉冲星导航进行组合。实验结果表明,该组合导航方法不受太阳自转和光谱不稳定性的影响,能够在深空探测捕获段提供高精度导航信息。更多还原

【Abstract】 Celestial Doppler difference navigation has the ability to suppress the velocity error caused by the solar spectral instability.However,the solar rotation leads to a small slow-varying bias in the celestial Doppler difference measurement,which results in the divergence of the navigation filter.To solve this problem,a celestial Doppler difference method is proposed,which resists both the solar rotation and the spectral instability.In this method,we establish the velocity difference bias model caused by solar rotation,and introduce it into the Doppler difference measurement model.As celestial Doppler navigation cannot work alone,we integrate it with X-ray pulsar navigation.The experimental results demonstrate that the integrated navigation method is immune to the solar rotation and the spectral instability,and can provide highly-accurate navigation information in the capture phase of deep space exploration.更多还原