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Architectural elements of hybrid navigation systems for future space transportation

Trigo, Guilherme Fragoso and Theil, Stephan (2018) Architectural elements of hybrid navigation systems for future space transportation. CEAS Space Journal. Springer. DOI: 10.1007/s12567-017-0187-z ISSN 1868-2502

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Official URL: http://link.springer.com/article/10.1007/s12567-017-0187-z

Abstract

The fundamental limitations of inertial navigation, currently employed by most launchers, have raised interest for GNSS-aided solutions. Combination of inertial measurements and GNSS outputs allows inertial calibration online, solving the issue of inertial drift. However, many challenges and design options unfold. In this work we analyse several architectural elements and design aspects of a hybrid GNSS/INS navigation system conceived for space transportation. The most fundamental architectural features such as coupling depth, modularity between filter and inertial propagation, and open-/closed-loop nature of the configuration, are discussed in the light of the envisaged application. Importance of the inertial propagation algorithm and sensor class in the overall system are investigated, being the handling of sensor errors and uncertainties that arise with lower grade sensory also considered. In terms of GNSS outputs we consider receiver solutions (position and velocity) and raw measurements (pseudorange, pseudorange-rate and time-difference carrier phase). Receiver clock error handling options and atmospheric error correction schemes for these measurements are analysed under flight conditions. System performance with different GNSS measurements is estimated through covariance analysis, being the differences between loose and tight coupling emphasized through partial outage simulation. Finally, we discuss options for filter algorithm robustness against non-linearities and system/measurement errors. A possible scheme for fault detection, isolation and recovery is also proposed.

Item URL in elib:https://elib.dlr.de/117902/
Document Type:Article
Title:Architectural elements of hybrid navigation systems for future space transportation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Trigo, Guilherme FragosoGuilherme.Trigo (at) dlr.dehttps://orcid.org/0000-0001-8173-9592
Theil, StephanStephan.Theil (at) dlr.dehttps://orcid.org/0000-0002-5346-8091
Date:2018
Journal or Publication Title:CEAS Space Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1007/s12567-017-0187-z
Publisher:Springer
ISSN:1868-2502
Status:Published
Keywords:GNSS/INS navigation, Inertial navigation, Loosely coupled, Tightly coupled, Launch vehicle navigation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Navigation and Control Systems
Deposited By: Trigo, Guilherme Fragoso
Deposited On:09 Jan 2018 10:10
Last Modified:31 Jul 2019 20:15

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