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Licensed Unlicensed Requires Authentication Published by Oldenbourg Wissenschaftsverlag March 13, 2018

Observer design for monocular visual inertial SLAM

Beobachterentwurf für VISLAM
Geoff Fink, Mirko Franke, Alan F. Lynch and Klaus Röbenack

Abstract

This paper examines the state estimation problem for unmanned aerial vehicles when commonly used positioning systems such as the global positioning system or indoor motion capture systems are unavailable. The proposed method uses inertial sensor measurements along with scaled position measurements from an onboard computer vision system which implements visual simultaneous localization and mapping. A state transformation puts the system into a linear time-varying form which simplifies observability analysis and allows for an observer design with sufficient conditions for convergence. The proposed design is validated by simulation.

Zusammenfassung

Dieser Beitrag untersucht das Problem der Zustandsschätzung für unbemannte Fluggeräte, wenn Referenzsysteme wie das globale Positionsbestimmungssystem oder Multikamera basierte Systeme zur Bewegungserfassung nicht verfügbar sind. Der vorgestellte Ansatz nutzt Messwerte eines Inertialsensors in Verbindung mit einem auf visueller simultaner Lokalisierung und Kartierung basierenden internen Computer Vision System. Mittels Zustandstransformation wird das System in eine lineare zeitvariante Form überführt, welche die Beobachtbarkeitsanalyse vereinfacht und einen Beobachterentwurf mit hinreichenden Konvergenzbedingungen erlaubt. Der Entwurf wird mittels Simulation verifiziert.

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Received: 2017-8-8
Accepted: 2018-1-8
Published Online: 2018-3-13
Published in Print: 2018-3-26

© 2018 Walter de Gruyter GmbH, Berlin/Boston