公开(公告)号：US11286065B2

公开(公告)日：2022-03-29

申请号：US16629725

申请日：2017-12-22

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Wenya Zhou ,  Yutao Wang ,  Hongtu Ma ,  Hongbo Chen ,  Zhentao Nie ,  Yongyuan Li

IPC: B64G1/62 ,  B64G1/24

Abstract: Disclosed is a method for designing a reentry trajectory based on flight path angle planning, including the following steps: S1. extracting an actual operating parameter of an aircraft, setting a maximum dynamic pressure qmax a maximum stagnation point heat flux {dot over (Q)}max, and a maximum overload nmax according to a mission requirement, and solving for a velocity-height boundary of a reentry trajectory; S2. solving for a reentry trajectory in an initial descent stage according to differential equations of reentry motion, and setting up a flight-path-angle lower limit γmin(V) according to the reentry trajectory in the initial descent stage, the velocity-height boundary, and a target point in a velocity-height phase plane; and S3. planning, based on the flight-path-angle lower limit γmin(V), a flight path angle satisfying terminal constraints, and calculating a corresponding bank angle to obtain a reentry trajectory.