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天文导航是一种适用于深空探测器的完全自主的导航方法.与传统的直接利用天体观测信息进行滤波的方法不同,针对深空探测器,提出了一种首先利用天文观测信息通过几何解算得到一个初步的定位结果,再结合轨道动力学方程利用多模自适应(MM)滤波方法对初步结果进行再处理的自主天文导航新方法.仿真计算的结果表明,该方法可以明显提高导航定位精度,同时从可观测性和可观测度的角度,分析了应用该方法提高导航定位精度的原因和机理.
Astronomical navigation is a completely autonomous navigation method applicable to deep space probes.Different from the traditional method of directly using celestial observation information to filter, aiming at the deep space probe, a method of using the astronomical observation information to solve the problem by using the geometric solution A new method of autonomous astronomical navigation, which re-processes the preliminary results by using multi-mode adaptive (MM) filter combining with orbital dynamics, is obtained.The simulation results show that this method can obviously improve the navigation and positioning Accuracy and at the same time analyzed the reasons and mechanism of improving the navigation and positioning accuracy by using this method from the view of observability and observability.