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Publisher DOI: 10.25967/550184
Title: Fuel-efficient flight control design for a hypersonic airliner
Language: English
Authors: Bodmer, Daniel 
Shah, Rhea Deven 
Linke, Florian 
Gollnick, Volker 
Keywords: STRATOFLY; Flight control; Feedback linearization; Trajectory simulation; Trajectory optimization
Issue Date: Aug-2021
Publisher: Deutsche Gesellschaft für Luft- und Raumfahrt
Source: 70. Deutscher Luft- und Raumfahrtkongress, (DLRK 2021)
Abstract (english): 
The determination of realistic flight mission characteristics, such as fuel consumption and flight time, requires fuel-optimal flight trajectories where the vehicles total trip fuel converges to a minimum. Within the Stratospheric Flying Opportunities for High-Speed Propulsion Concepts research project, one of the main challenging factors is the design of artificial flight controllers for maintaining 4D fuel-optimal trajectories for the STRATOFLY MR3 vehicle. In this paper, we propose a continuous climb cruise (CCC) flight controller as well as a zoom dive (ZD) flight controller which are derived using Feedback Linearization and embedded in a MATLAB-based trajectory simulation program. This incorporates the establishment of a proper control design model, an aircraft state estimator and the limitation of the plants control inputs to ensure a bounded fast-time, forward integration of all aircraft state variables based on a 3 degrees of freedom point-mass model. Simulation results are presented showing that the CCC controller is primarily used in the hypersonic cruise phase - covering the main flight segment of MR3 - and that the ZD controller is used in the transonic region (while the vehicle reaches Mach 1), both ensuring a total decay of 2.98 % in the vehicles fuel consumption for a reference flight mission from Brussels to Sydney.
Conference: 70. Deutscher Luft- und Raumfahrtkongress, (DLRK 2021) 
DOI: 10.15480/882.3877
Institute: Lufttransportsysteme M-28 
Document Type: Chapter/Article (Proceedings)
Project: Stratospheric Flying Opportunities for High-Speed Propulsion Concepts 
Funded by: European Union 
More Funding information: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 769246 within the Stratospheric Flying Opportunities for High-Speed Propulsion Concepts (STRATOFLY) Project.
License: In Copyright In Copyright
Cites: 10.25967/550184
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