Mitarbeiter

Dr. Leif Christensen

Organisation : DFKI GmbH
Bereich : Robotics Innovation Center
Status : Mitarbeiter
Raumnr. HB : A 2.13
Adresse HB : Robert-Hooke-Str. 1
28359 Bremen
Telefon HB : +49 421 17845 4149
E-Mail schreiben


Publikationen

2025

MV3D: Multi-View 3D Reconstruction of Objects Using Forward-Looking Sonar
Nael Jaber, Bilal Wehbe, Leif Christensen, Frank Kirchner
Editors: Tamim Asfour, Abhinav Valada
In IEEE Robotics and Automation Letters, IEEE, volume 10, pages 8762-8769, 2025.

2024

Attitude Control of the Hydrobatic Intervention AUV Cuttlefish using Incremental Nonlinear Dynamic Inversion
Tom Vincent Slawik, Shubham Vyas, Leif Christensen, Frank Kirchner
In 2024 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2024), (IROS-2024), 14.10.-18.10.2024, Abu Dhabi, IEEE, Oct/2024.
Deep Reinforcement Learning for Path-Following Control of an Autonomous Surface Vehicle using Domain Randomization
Tom Vincent Slawik, Bilal Wehbe, Leif Christensen
In 15th IFAC Conference on Control Applications in Marine Systems, Robotics and Vehicles, 2024, (CAMS-2024), 03.9.-05.9.2024, Blacksburg, Virginia, n.n., Sep/2024.
An Acoustic and Optical Dataset for the Perception of Underwater Unexploded Ordnance (UXO)
Nikolas Dahn, Miguel Bande Firvida, Proneet Kumar Sharma, Leif Christensen, Oliver Geisler, Jochen Mohrmann, Torsten Frey, Prithvi Sanghamreddy, Frank Kirchner
In OCEANS, (OCEANS-2024), 23.9.-26.9.2024, Halifax, Kanada, IEEE, Sep/2024.
Autonomous Docking between a Mobile Subsea Docking Station and an AUV while in Motion
Nikolas Dahn, Christopher Gaudig, Tim Lehr, Niklas Pech, Peter Kampmann, Leif Christensen, Frank Kirchner
In OCEANS, (OCEANS-2024), 23.9.-26.9.2024, Halifax, Kanada, IEEE, Sep/2024.

2022

The Hydrobatic Dual-Arm Intervention AUV Cuttlefish
Leif Christensen, Jens Hilljegerdes, Michael Zipper, Andrej Kolesnikov, Benjamin Hülsen, Christian Ernst Siegfried Koch, Marc Hildebrandt, Leon C. Danter
In OCEANS 22 Hampton Roads, (OCEANS-2022), 17.10.-20.10.2022, Hampton Roads, VA, IEEE, pages 1-8, Oct/2022. MTS / IEEE OES.
Recent Advances in AI for Navigation and Control of Underwater Robots
Leif Christensen, José de Gea Fernández, Marc Hildebrandt, Christian Ernst Siegfried Koch, Bilal Wehbe
Editors: Springer
In Current Robotics Reports, Springer, volume n.n., pages n.n.-n.n., Jul/2022.

2021

Induced Magnetic Field-Based Indoor Positioning System for Underwater Environments
Sizhen Bian, Peter Hevesi, Leif Christensen, Paul Lukowicz
In Sensors - Open Access Journal, MDPI, volume 21, number 6, pages 25, Mar/2021.

2019

Robot Navigation in Distorted Magnetic Fields
Leif Christensen
pages 167, Nov/2019. Universität Bremen. ISBN: urn:nbn:de:gbv:46-00107804-10.

2018

Modular Payload-Items for Payload-assembly and System Enhancement for Future Planetary Missions
Wiebke Brinkmann, Florian Cordes, Thomas M. Roehr, Leif Christensen, Tobias Stark, Roland Sonsalla, Roman Szczuka, Niklas Alexander Mulsow, Felix Bernhard, Daniel Kuehn
In Proceedings of the 2018 IEEE Aerospace Conference, 03.3.-10.3.2018, Big Sky, Montana, IEEE, Mar/2018.
How AI and Robotics can Support Marine Mining
Peter Kampmann, Leif Christensen, Martin Fritsche, Christopher Gaudig, Hendrik Hanff, Marc Hildebrandt, Frank Kirchner
In Offshore Technology Conference, (OTC-2018), 29.4.-4.5.2018, Houston, Texas, OnePetro, 2018.

2017

Learning Magnetic Field Distortion Compensation for Robotic Systems
Leif Christensen, Mario Michael Krell, Frank Kirchner
In Intelligent Robots and Systems (IROS), (IROS), 24.9.-28.9.2017, Vancouver, BC, IEEE, Sep/2017.
Combining Cameras, Magnetometers and Machine-Learning into a Close-Range Localization System for Docking and Homing
Marc Hildebrandt, Leif Christensen, Frank Kirchner
In MTS/IEEE Oceans 2017 Anchorage, (OCEANS-2017), 18.9.-21.9.2017, Anchorage, Alaska, IEEE, Sep/2017.
Field Testing of a Cooperative Multi-Robot Sample Return Mission in Mars Analogue Environment
Roland Sonsalla, Florian Cordes, Leif Christensen, Thomas M. Roehr, Tobias Stark, Steffen Planthaber, Michael Maurus, Martin Mallwitz, Elsa A. Kirchner
In Proceedings of the 14th Symposium on Advanced Space Technologies in Robotics and Automation (ASTRA 20017), (ASTRA-2017), 20.6.-22.6.2017, Leiden, ESA, Jun/2017. ESA/ESTEC.
Bremer Roboter-Team auf Marsmission in der Wüste Utahs
Roland Sonsalla, Florian Cordes, Leif Christensen, Steffen Planthaber, Michael Maurus, Thomas M. Roehr, Tobias Stark, Andrea Fink
In Luft- und Raumfahrt, Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. (DGLR), volume Jahrgang 38, number 1/2017, pages 36-39, Jan/2017.
Controlling a Semi-Autonomous Robot Team From a Virtual Environment
Steffen Planthaber, Michael Maurus, Bertold Bongardt, Martin Mallwitz, Luis Manuel Vaca Benitez, Leif Christensen, Florian Cordes, Roland Sonsalla, Tobias Stark, Thomas M. Roehr
In Proceedings of the HRI conference, (HRI), 06.3.-09.3.2017, Vienna, ACM/IEEE, 2017.

2016

Proceedings of the RIC Project Day Workgroups ‘Locomotion & Mobility’ and ‘Navigation & Planning’
Editors: Florian Cordes, Leif Christensen, Frank Kirchner
series DFKI Documents, volume 16-03, Sep/2016. DFKI GmbH.

2015

Distortion-Robust Distributed Magnetometer for Underwater Pose Estimation in Confined UUVs
Leif Christensen, Christopher Gaudig, Frank Kirchner
In Proceedings of MTS IEEE OCEANS '15, (OCEANS-15), 19.10.-22.10.2015, Washington, DC, IEEE, pages 1-8, Oct/2015.
Proceedings of the RIC Project Day 09/2015
Editors: Frank Kirchner, Florian Cordes, Leif Christensen
series DFKI Documents, volume 15-03, pages 134, Sep/2015. DFKI GmbH.
AG Navigation & Planning Introduction’
Leif Christensen
series DFKI Documents, volume 15-03, pages 3, Sep/2015. DFKI GmbH.
Underwater Distributed Magnetometers
Leif Christensen
series DFKI Documents, volume 15-03, pages 8, Sep/2015. DFKI GmbH.

2014

A Validation Process for Underwater Localization Algorithms
Marc Hildebrandt, Christopher Gaudig, Leif Christensen, Sankaranarayanan Natarajan, Javier Hidalgo Carrió, Patrick Merz Paranhos, Frank Kirchner
In International Journal of Advanced Robotic Systems, Intech, volume 11, pages 1-10, Sep/2014.
Towards a Heterogeneous Modular Robotic Team in a Logistic Chain for Extraterrestrial Exploration
Roland Sonsalla, Florian Cordes, Leif Christensen, Steffen Planthaber, Jan Albiez, Ingo Scholz, Frank Kirchner
In Proceedings of the International Symposium on Artificial Intelligence, Robotics and Automation in Space (i-SAIRAS 2014), (iSAIRAS-2014), 17.6.-19.6.2014, Montreal, o.A., Jun/2014.

2012

Two years of Experiments with the AUV Dagon - a Versatile Vehicle for High Precision Visual Mapping and Algorithm Evaluation
Marc Hildebrandt, Christopher Gaudig, Leif Christensen, Sankaranarayanan Natarajan, Patrick Merz Paranhos, Jan Albiez
In Proceedings of IEEE/OES Autonomous Underwater Vehicles, (AUV-2012), 24.9.-27.9.2012, Southampton, o.A., Sep/2012. ISBN: 978-1-4577-2056-7 .

2011

Tank inspection by cost effective rail based robots
Leif Christensen, Johannes Lemburg, Thomas Vögele, Frank Kirchner, Niklas Fischer, Reinhard Ahlers, George Psarros, Lars-Eric Etzold
In Proceedings of the 15th International Conference on Computer Applications in Shipbuilding, (ICCAS-11), 20.9.-22.9.2011, Trieste, o.A., Sep/2011.
Cost-Effective Autonomous Robots for Ballast Water Tank Inspection
Leif Christensen, Niklas Fischer, Sven Kroffke, Johannes Lemburg, Reinhard Ahlers
In Journal of Ship Production and Design, Society of Naval Architects and Marine Engineers , volume 27, number 3, pages 127-136, Aug/2011.
Cost Effective Autonomous Robots for Ballast Water Tank Inspection
Leif Christensen, Niklas Fischer, Sven Kroffke, Johannes Lemburg, Reinhard Ahlers
Editors: Volker Bertram
In Proceedings of the 10th Conference on Computer Applications and Information Technology in the Maritime Industries, (COMPIT-11), 02.5.-04.5.2011, Berlin, Technische Universität Hamburg-Harburg, pages 109-123, May/2011. ISBN: 978-3-89220-649-1.

2010

USBL Pose Estimation using Multiple Responders
Leif Christensen, Martin Fritsche, Jan Albiez, Frank Kirchner
In Proceedings of OCEANS 10 IEEE Sydney, (OCEANS-10), 24.5.-27.5.2010, Sydney, o.A., May/2010.

2009

Hardware ROV simulation facility for the evaluation of novel underwater manipulation techniques
Leif Christensen, Peter Kampmann, Marc Hildebrandt, Jan Albiez, Frank Kirchner
In OCEANS 2009 - EUROPE, 2009. OCEANS 2009, (OCEANS-09), 11.5.-14.5.2009, Bremen, o.A., May/2009. ISBN: 978-1-4244-2523-5.
Realtime motion compensation for ROV-based teleoperated underwater manipulators
Marc Hildebrandt, Leif Christensen, Jochen Kerdels, Jan Albiez, Frank Kirchner
In OCEANS 2009 - EUROPE, 2009 OCEANS 09, (OCEANS-09), 11.5.-14.5.2009, Bremen, o.A., May/2009. ISBN: 978-1-4244-2523-5.


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zuletzt geändert am 12.01.2024