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近年提出了利用地月系平动点建立深空导航星座的设想。在受太阳摄动的真实力模型下,地月系平动点是不稳定的,从而会导致导航星座必须通过控制才能定点在特定区域。针对此问题,引入一种特殊的平动点轨道,即动力学替代轨道。平动点轨道卫星星座可利用星间测距数据自主定轨,由于动力学替代轨道具有长期稳定性,整个自主定轨过程不需要来自地面的测控支持,且定轨精度可达到观测精度。研究结果表明,观测资料的长短、导航卫星垂直白道面的运动分量都将影响到导航星间的自主定轨精度。该研究成果可以应用在以后的地月系导航星座中。
In recent years, the idea of establishing a deep-space navigation constellation using the geo-lunar system translation point has been proposed. Under the true force model perturbed by the sun, the translational instability of the earth-moon system is unstable, which leads to the navigation constellation having to be controlled to locate in a specific area. In response to this problem, a special kind of translational point orbit is introduced, that is, dynamic alternative orbit. The orbital satellite constellation can use the inter-satellite ranging data to make autonomous orbit determination. Since the dynamic alternative orbit has long-term stability, the entire autonomous orbit determination process does not need the monitoring and control support from the ground and the orbit determination accuracy can reach the observation accuracy. The results show that the length of observational data and the motion components of vertical white pavement of navigation satellite will affect the accuracy of autonomous orbit determination. The research results can be applied in the future of the lunar system navigation constellation.