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地月平动点中继应用轨道对于月球背面探测具有十分重要的应用价值,由于地月平动点的不稳定性,必须进行轨道维持。文章研究了真实力模型下月球平动点中继应用轨道的维持。首先,基于限制性三体问题下平动点轨道的运动特性,研究了平动点轨道维持的数学模型与维持策略,提出了平动点轨道维持的连续环绕控制方法,并给出了轨道维持的Halo和Lissajous两种控制方式;其次,充分考虑各天体和光压摄动下,采用数值手段研究了不同幅值的地月平动点周期中继应用轨道的维持间隔与速度增量等。研究结果表明:Lissajous控制方式适用于月球平动点中继应用轨道的维持,在给定测控精度条件下,维持间隔约7.4d,速度增量优于20m/s/a。该方法已经成功应用于我国“嫦娥2号”日地平动点任务和“嫦娥5T1”地月平动点任务并获得了良好的控制效果,还可直接应用于我国未来“嫦娥4号”等月球背面探测任务。
Geostationary translation point The relay application orbit has very important application value to the lunar back detection. Due to the instability of the geostationary translation point, the orbit must be maintained. In this paper, we study the maintenance of the orbital application track of the translational point of the moon under the real force model. First of all, based on the motion characteristics of the fixed-point trajectory under the restricted three-body problem, the mathematical model and the maintenance strategy of the trajectory maintaining at the translational point are studied, and the continuous surround control method of the trajectory maintaining at the translational point is proposed. Halo and Lissajous. Secondly, considering the celestial bodies and the perturbation of light pressure, numerical experiments are carried out to study the interval and velocity increment of the applied orbit of the earth-moon translational points with different amplitude. The results show that the Lissajous control method is suitable for the maintenance of relay application orbit at the translational point of the moon. Under the given measurement and control precision, the Lissajous control method maintains an interval of about 7.4d and the speed increment is better than 20m / s / a. The method has been successfully applied to the task of “China’s Chang’e 2” day-ground moving point task and the “Chang’e 5T1” ground moving point task and has obtained the good control effect. It can also be directly applied to the future of our country “Chang’e 4 ”and other lunar back exploration mission.