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Optimal Guidance and Control of Lunar Landers with Non-throttable Main Engine

Oehlschlägel, T. and Theil, S. and Krüger, H. and Knauer, M. and Tietjen, J. and Büskens, C. (2011) Optimal Guidance and Control of Lunar Landers with Non-throttable Main Engine. In: Advances in Aerospace Guidance, Navigation and Control Advances in Aerospace Guidance, Navigation and Control, Selected Papers of the 1st CEAS Specialist Conference on Guidance, Navigation and Control . Springer Verlag. pp. 451-463. ISBN 3642198163.

Full text not available from this repository.

Abstract

Autonomous soft, safe and precise landing on celestial bodies like the Moon, planets and asteroids is still a challenging task for future exploration missions. To achieve a maximum of payload mass landed on the target body the trajectories of landing vehicles need to be (fuel) optimized. In order to allow an adjustability of the trajectory and a compensation of disturbances for all vehicles so far a thrust modulation is required. The drawback is that currently no main engine is available which allows the needed thrust modulation for an efficient, robust and safe landing on a celestial body like the Moon. The technology of the Apollo missions is not available anymore.Most planned lunar missions rely on the modulation capability of multiple engines where in some cases the thrust of the auxiliary engines for modulation is in the order of main engine thrust. This approach requires a large number of smaller engines to achieve the needed thrust modulation adding complexity and increasing the probability of failure. This paper shows a different approach to compute and control optimal trajectories for landing vehicles. It provides a new method for computing fuel efficient optimal trajectories which require minimal thrust modulation. A corresponding tracking control scheme is presented which allows the pre-computed optimal trajectory to be followed. The robustness of the method is discussed with results of a simulation.

Document Type:Book Section
Title:Optimal Guidance and Control of Lunar Landers with Non-throttable Main Engine
Authors:
AuthorsInstitution or Email of Authors
Oehlschlägel, T.thimo.oehlschlaegel@dlr.de
Theil, S.UNSPECIFIED
Krüger, H.UNSPECIFIED
Knauer, M.UNSPECIFIED
Tietjen, J.UNSPECIFIED
Büskens, C.UNSPECIFIED
Date:2011
Journal or Publication Title:Advances in Aerospace Guidance, Navigation and Control
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Selected Papers of the 1st CEAS Specialist Conference on Guidance, Navigation and Control
Page Range:pp. 451-463
Editors:
EditorsEmail
Holzapfel, F.UNSPECIFIED
Theil, S.UNSPECIFIED
Publisher:Springer Verlag
Series Name:Advances in Aerospace Guidance, Navigation and Control
ISBN:3642198163
Status:Published
Keywords:Optimal Guidance, Optimal Control, Lunar Lander, Feedback Control
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Regelungs- und Datensysteme
Deposited By: Thimo Oehlschlägel
Deposited On:14 Feb 2012 10:23
Last Modified:14 Feb 2012 10:23

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