Optimal lunar surface circling and leap trajectory generation method

The invention relates to an optimal lunar surface circling and leap trajectory generation method, and belongs to the field of trajectory design of celestial body surface flight detectors. The method comprises the following steps: 1, dividing a leap track into three stages; 2, establishing a motion model in a two-dimensional plane of the leap track; 3, setting constraint conditions of the control quantity of each stage; 4, setting initial conditions and terminal conditions of each stage; 5, setting an optimal control quantity form of each stage according to the motion models, the control quantity constraint conditions, the initial conditions and the terminal conditions obtained in the steps 2-4; 6, according to the motion models obtained in the steps 2-5, the control quantity constraint condition, the initial condition, the terminal condition and the optimal control quantity form, a corresponding optimal track is obtained through one-dimensional search in each stage; and step 7, combining the optimal trajector