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Beam-Riding Analysis of a Parabolic Laser-thermal Thruster

Scharring, Stefan and Eckel, Hans-Albert and Röser, Hans-Peter (2011) Beam-Riding Analysis of a Parabolic Laser-thermal Thruster. In: AIP Conference Proceedings, 1402, pp. 115-131. American Institute of Physics. Seventh International Symposium on Beamed Energy Propulsion, 10.-14. April 2011, Ludwigsburg, Deutschland. ISBN 978-0-7354-0974-3. ISSN 0094-243X

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Official URL: http://scitation.aip.org/dbt/dbt.jsp?KEY=APCPCS&Volume=1402&Issue=1

Abstract

Flight experiments with laser-propelled vehicles (lightcrafts) are often performed by wire-guidance or with spin-stabilization. Nevertheless, the specific geometry of the lightcraft’s optics and nozzle may provide for inherent beam-riding properties. These features are experimentally investigated in a hovering experiment at a small free fliight test range with an electron-beam sustained pulsed CO2 high energy laser. Laser bursts are adapted with a real-time control to lightcraft mass and impulse coupling for ascent and hovering in a quasi equilibrium of forces. The flight dynamics is analyzed with respect to the impulse coupling field vs. attitude, given by the lightcraft’s offset and its inclination angle against the beam propagation axis, which are derived from the 3Dreconstruction of the flight trajectory from highspeed recordings. The limitations of the experimental parameters’ reproducibility and its impact on flight stability are explored in terms of Julia sets. Solution statements for dynamic stabilization loops are presented and discussed.

Document Type:Conference or Workshop Item (Speech)
Title:Beam-Riding Analysis of a Parabolic Laser-thermal Thruster
Authors:
AuthorsInstitution or Email of Authors
Scharring, Stefanstefan.scharring@dlr.de
Eckel, Hans-AlbertHans-Albert.Eckel@dlr.de
Röser, Hans-Peterroeser@irs.uni-stuttgart.de
Date:11 November 2011
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:No
In ISI Web of Science:No
Volume:1402
Page Range:pp. 115-131
Editors:
EditorsEmail
Eckel, Hans-Alberthans-albert.eckel@dlr.de
Scharring, Stefanstefan.scharring@dlr.de
Publisher:American Institute of Physics
ISSN:0094-243X
ISBN:978-0-7354-0974-3
Status:Published
Keywords:Laser propulsion, Free flight experiments, Lightcraft, Repetition rate, Impulse coupling coefficient, High speed analysis, CO2 laser, Stabilization, Beam-Riding
Event Title:Seventh International Symposium on Beamed Energy Propulsion
Event Location:Ludwigsburg, Deutschland
Event Type:international Conference
Event Dates:10.-14. April 2011
Organizer:DLR Institut für Technische Physik
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Stefan Scharring
Deposited On:02 Dec 2011 15:06
Last Modified:12 Dec 2013 21:25

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