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Performance Analysis of Real-Time Optimal Guidance Methods for Vertical Take-Off, Vertical Landing Vehicles

Wenzel, Andreas and Sagliano, Marco and Seelbinder, David (2018) Performance Analysis of Real-Time Optimal Guidance Methods for Vertical Take-Off, Vertical Landing Vehicles. In: Proceedings of the International Astronautical Congress, IAC. 69th International Astronautical Congress, 1-5 Oct 2018, Bremen, Germany.

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Abstract

In the frame of technology development for reusable launch vehicles and future planetary landing missions the German Aerospace Center (DLR) is developing a demonstrator vehicle (EAGLE) for vertical take-off and landing. The mission profile of EAGLE requires the capability to compute feasible ascent and descent trajectories in real-time. This is achieved using guidance methods based on convex optimal control theory. By applying loss-less convexification, the powered-descent and landing fuel-optimal control problem is converted into a second order cone programming problem. We combine different transcription methods (pseudospectral and multiple shooting) and automatic scaling routines to improve the numerical conditioning of the problem. We assess the performance of the transcription methods in rapid-prototype simulations and processor-in-the-loop testing on EAGLE's real-time onboard computer system. The results show that the proposed strategies based on convex programming are a significant step towards achieving real-time optimal control in Europe.

Item URL in elib:https://elib.dlr.de/124197/
Document Type:Conference or Workshop Item (Speech)
Title:Performance Analysis of Real-Time Optimal Guidance Methods for Vertical Take-Off, Vertical Landing Vehicles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wenzel, AndreasAndreas.Wenzel (at) dlr.dehttps://orcid.org/0000-0002-4370-1291
Sagliano, MarcoMarco.Sagliano (at) dlr.dehttps://orcid.org/0000-0003-1026-0693
Seelbinder, Daviddavid.seelbinder (at) dlr.dehttps://orcid.org/0000-0003-4080-3169
Date:2018
Journal or Publication Title:Proceedings of the International Astronautical Congress, IAC
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:Optimal Guidance, Online Trajectory Optimization, Convex Optimization, Pseudospectral Methods, Vertikal Take-Off and Landing
Event Title:69th International Astronautical Congress
Event Location:Bremen, Germany
Event Type:international Conference
Event Dates:1-5 Oct 2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Wiederverwendbare Raumfahrtsysteme
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Navigation and Control Systems
Deposited By: Wenzel, Andreas
Deposited On:05 Dec 2018 09:28
Last Modified:05 Dec 2018 09:28

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