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Strategies for in-orbit calibration of drag-free control systems

Guilherme, Michel Silas and Leite Filho, Waldemar Castro and Theil, Stephan (2008) Strategies for in-orbit calibration of drag-free control systems. Aerospace Science and Technology, 12 (5), pp. 365-375. ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 23 RUE LINOIS, 75724 PARIS, FRANCE. DOI: 10.1016/j.ast.2007.09.002.

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Abstract

Drag-Free Satellites (DFS) are a class of scientific satellite missions designed for research on fundamental physics as well as geodesy. They consist, basically, of a small inner satellite (test mass) located in a cavity inside a larger satellite, the normal one. The Drag-Free Attitude Control System (DFACS) is the most complex technology on-board these satellites. This key technology allows the residual accelerations on experiments on board the satellites to be significantly reduced. In order to achieve this very low disturbance environment (for some missions < 10(-14) g) the drag-free control system has to be optimized. This optimization process is required because of uncertainties in system parameters that demand a robustness of the control system. This paper will present approaches for in-orbit calibration of drag-free control systems. The discussion includes modeling, with scale factors and cross couplings, possible excitation signals, comparison of different parameter identification/estimation methods as well as simulation results. (c) 2007 Elsevier Masson SAS. All rights reserved.

Document Type:Article
Title:Strategies for in-orbit calibration of drag-free control systems
Authors:
AuthorsInstitution or Email of Authors
Guilherme, Michel SilasUNSPECIFIED
Leite Filho, Waldemar CastroUNSPECIFIED
Theil, StephanStephan.Theil@dlr.de
Date:July 2008
Journal or Publication Title:Aerospace Science and Technology
Volume:12
DOI:10.1016/j.ast.2007.09.002
Page Range:pp. 365-375
Publisher:ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 23 RUE LINOIS, 75724 PARIS, FRANCE
Status:Published
Keywords:drag-free satellite; parameter estimation; closed-loop identification
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Regelungs- und Datensysteme
Deposited By: Dr.-Ing. Stephan Theil
Deposited On:15 Jun 2010 12:56
Last Modified:12 Dec 2013 20:57

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