Hypersonic aircraft airborne trajectory planning method and device, aircraft and medium

The invention discloses a hypersonic aircraft airborne trajectory planning method and device, an aircraft and a medium. A reentry gliding section motion equation of a hypersonic aircraft is used as a training environment of a trajectory planning problem of the hypersonic aircraft; constructing a state space, a strategy action space, an environment dynamic transfer function, a reward function and a discount factor of the trajectory planning problem; and training the neural network of the trajectory planning problem by using a deep reinforcement learning algorithm. And inputting the state space obtained in the flight process into the trained Actor network to obtain a strategy action space, so that the hypersonic aircraft flies to a predetermined target area according to the strategy action space to complete the flight task of reentering the gliding section. According to the method, airborne real-time trajectory planning of the hypersonic flight vehicle in the gliding section is realized by using an artificial i