Method for designing reentry trajectory based on flight path angle planning

US11286065B2 · kind B2 · utility

Assignee

• Dalian University of Technology · CN

Inventors

• Wenya Zhou · Dalian, CN
• Yutao WANG · Dalian, CN
• Hongtu Ma · Dalian, CN
• Hongbo Chen · Beijing, CN
• Zhentao Nie · Dalian, CN
• Yongyuan Li · Dalian, CN

Key dates

• Filing date: Dec 22, 2017
• Grant date: Mar 29, 2022
• Expiry date: Oct 8, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64G1/245
• WIPO field: Transport
• WIPO sector: Mechanical engineering

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.