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针对北斗导航星座的MEO卫星相对相位自主保持问题,推导了相对相位的演化,提出了一种由相对相位的变化量间接求取长半轴偏差,同时结合极限环控制方法的相对相位自主保持策略。在天文导航所带来的大噪声影响下,采用该自主保持策略求得的长半轴偏差与真实长半轴偏差之间相差不大,满足长期轨道保持要求。最后,通过算例验证了间接补偿长半轴后,相对相位的漂移基本被消除。所提出的方法可以为北斗导航星座的MEO卫星的自主轨道保持提供参考。
Aiming at the autonomous holding of relative phase of MEO satellite in BeiDou navigation constellation, the evolution of relative phase is deduced. A new method is proposed, which is to obtain the semi-axis deviation indirectly from the change of relative phase and to control the relative phase by using limit cycle control . Under the influence of large noises brought by astronomical navigation, the difference between the long-axis deviation and the true long-axis deviation obtained by the self-sustaining strategy is not large enough to meet the long-term orbit maintenance requirements. Finally, an example is given to verify that after compensating the semi-major axis indirectly, the relative phase shift is basically eliminated. The proposed method can provide reference for the autonomous orbit keeping of MEO satellite of Beidou navigation constellation.