Fuzzy logic controllers are designed for spacecraft hovering flight in a binary asteroid system. The binary asteroid system is modeled as an ellipsoid-sphere system where the spherical harmonics method is adopted to represent the gravitational field of the asteroids. The method to design the fuzzy logic controllers is introduced in detail. Hovering flight about the inner collinear equilibrium point L1 of binary asteroid Didymos is numerically presented. Detailed steps on roughly estimating the scaling gains of fuzzy logic controllers are also summarized. Numerical simulations are performed to show the effectiveness of the proposed method. Moreover, the aforementioned fuzzy logic controllers can be used for both continuous and impulsive thrusters. The fuzzy controllers with continuous thrust, the fuzzy controllers with fixed thrust, and the other two kinds of sliding-mode controllers are optimized in the same way and compared in the same simulation environment together, to show tremendous advantages of fuzzy logic controllers and continuous thrusters on both control performance and propellant consumption.

中文翻译：

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基于模糊逻辑控制的双星小行星系统中的航天器悬停飞行

模糊逻辑控制器是为航天器在双小行星系统中悬停飞行而设计的。双小行星系统被建模为椭球系统，其中采用球谐函数来表示小行星的引力场。详细介绍了模糊逻辑控制器的设计方法。数值显示了双小行星Didymos内部共线平衡点L1的悬停飞行。还总结了粗略估计模糊逻辑控制器缩放增益的详细步骤。进行数值模拟以表明所提出方法的有效性。此外，上述模糊逻辑控制器可用于连续和脉冲推进器。连续推力的模糊控制器，固定推力的模糊控制器，