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PERIODIC ORBITS IN ROTATING 2ND DEGREE AND ORDER GRAVITY FIELDS

机译:旋转第二度和阶重力场的周期轨道

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摘要

Periodic orbits in an arbitrary 2nd degree and order uniformly rotating gravity field are studied. First we discuss the four equilibrium points in this gravity field. We show that two of them are always unstable and the other two can either be stable or unstable. Next we discuss periodic orbits with non-zero periods. In our searching procedure for these periodic orbits, we remove the 2 unity eigenvalues from the state transition matrix to find a robust, non-singular linear map to solve for the periodic orbits. The algorithm converges well, especially for stable periodic orbits. Using the searching procedure, which is relatively automatic, we find five basic families of periodic orbits in the rotating second degree and order gravity field for planar motion, and discuss their existence and stability at different central body rotation rates.
机译:研究了任意二度和周期均匀旋转重力场的周期轨道。首先,我们讨论该重力场中的四个平衡点。我们显示其中两个始终不稳定,另外两个可以稳定或不稳定。接下来,我们讨论周期为非零的周期轨道。在我们搜索这些周期轨道的过程中,我们从状态转换矩阵中删除了2个单位特征值,以找到一个健壮的,非奇异的线性图来求解周期轨道。该算法收敛良好,特别是对于稳定的周期性轨道。使用相对自动的搜索过程,我们在平面运动的二度和阶重力旋转场中找到了五个基本的周期性轨道族,并讨论了它们在不同中心体旋转速率下的存在性和稳定性。

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