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Sounding Rocket Dispersion Reduction by Second Stage Pointing Control

Scheuerpflug, Frank and Kallenbach, Alexander and Cremaschi, Francesco (2012) Sounding Rocket Dispersion Reduction by Second Stage Pointing Control. Journal of Spacecraft and Rockets, Volume (Number). American Institute of Aeronautics and Astronautics (AIAA). ISSN 0022-4650


Official URL: http://arc.aiaa.org/doi/pdf/10.2514/1.60043


The mission architecture of SHEFEX II features a two-stage solid propellant sounding rocket vehicle on a suppressed trajectory, which is induced by a cold gas pointing maneuver of the vehicle before second stage ignition. The impact point is subject to a 3-� dispersion of roughly�110 kmin downrange and�90 kmin crossrange, which makes a recovery of the vehicle particularly difficult, as the whole impact area is located off shore and the vehicle needs to be recovered by ship. As the major part to dispersion is contributed during the atmospheric ascent of the vehicle, a control algorithm is developed that considers the actual deviation from the nominal trajectory after atmospheric exit and recommends a vehicle pointing that corrects for this deviation. The analytic control algorithm is found by linear/quadratic approximation of the impact point sensitivity towards the deviations after atmospheric exit and to the pointing angles. The effectiveness of the algorithm is tested by implementing it in a full six-degree-offreedom simulation and applying dispersion factors in a Monte Carlo simulation. The result is a reduction of the impact point dispersion area by about 78%.

Item URL in elib:https://elib.dlr.de/82127/
Document Type:Article
Title:Sounding Rocket Dispersion Reduction by Second Stage Pointing Control
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Scheuerpflug, FrankFrank.Scheuerpflug (at) dlr.deUNSPECIFIED
Kallenbach, AlexanderAlexander.Kallenbach (at) dlr.deUNSPECIFIED
Cremaschi, Francescofrancesco.cremaschi (at) astos.deUNSPECIFIED
Date:November 2012
Journal or Publication Title:Journal of Spacecraft and Rockets
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Dispersion, Sounding Rocket, Impact Point, SHEFEX II
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 - SHEFEX Programm (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Mobile Rocket Base
Deposited By: Stamminger, Dr. Andreas
Deposited On:26 Apr 2013 10:29
Last Modified:31 Jul 2019 19:40

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