多颗小行星探测顺序确定及轨迹优化

小行星探测日渐成为深空探测领域的一个研究热点。考虑小行星Kepler轨道以及小推力航天器的特点,从能量和相位的角度推导出多颗小行星探测顺序的确定准则,并利用优化算法对航天器的飞行轨迹进行了全局优化设计。算法在满足约束条件的前提下,使得航天器剩余质量与飞行时间的比值达到最大,并通过数值仿真算例验证了算法的可行性。结果表明:该算法综合利用遗传算法和局部优化算法具有精度高、计算简单的特点,可用于小行星探测的轨迹优化设计问题。

Sequence determination and trajectory optimization for the exploration of asteroids

The exploration of asteroids is becoming a focus of deep space exploration.A criteria was developed to determine the sequence for exploring asteroids based on the energy and phase of the Keplerian orbits of the asteroids and the characteristics of low-thrust spacecraft,with an optimization algorithm used to globally optimize the spacecraft flight trajectory design.The method maximizes the ratio of the left mass to the flight time of the spacecraft.A numerical example is given to prove the feasibility of the method.The results show that the method effectively combines the genetic algorithm and a local optimization algorithm in a high precision,low computation complexity algorithm suitable for optimizing trajectories for the exploration of asteroids.