Trajectory optimization method, device and equipment with pulse combined with small thrust

The invention relates to a trajectory optimization method, device and equipment combining pulses with small thrust, and the method comprises the steps: constructing a trajectory optimization model, obtaining a small thrust time optimal transfer trajectory based on an indirect method, and obtaining a first transfer duration; the first transfer duration is used as a time optimal objective function, an evolutionary algorithm is adopted to optimize the pulse combination time optimal small thrust trajectory model, a pulse combination small thrust time optimal transfer trajectory is obtained, and a first transfer duration lower limit is obtained; calculating a second transfer duration according to the lower limit of the first transfer duration; determining a fuel optimal target function according to the second transfer duration, and obtaining a low-thrust fuel optimal transfer track based on an indirect method; and based on the fuel optimal target function, optimizing the pulse combined low-thrust fuel optimal traj