Searched for: author:"de Wagter, C."
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Wijnker, D.C. (author), van Dijk, Tom (author), Snellen, M. (author), de Croon, G.C.H.E. (author), de Wagter, C. (author)
To investigate how an unmanned air vehicle can detect manned aircraft with a single microphone, an audio data set is created in which unmanned air vehicle ego-sound and recorded aircraft sound are mixed together. A convolutional neural network is used to perform air traffic detection. Due to restrictions on flying unmanned air vehicles close to...
journal article 2021
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Coppola, M. (author), McGuire, K.N. (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)
This work presents a review and discussion of the challenges that must be solved in order to successfully develop swarms of Micro Air Vehicles (MAVs) for real world operations. From the discussion, we extract constraints and links that relate the local level MAV capabilities to the global operations of the swarm. These should be taken into...
review 2020
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Li, S. (author), van der Horst, E. (author), Duernay, Philipp (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)
Drone racing is becoming a popular e-sport all over the world, and beating the best human drone race pilots has quickly become a new major challenge for artificial intelligence and robotics. In this paper, we propose a novel sensor fusion method called visual model-predictive localization (VML). Within a small time window, VML approximates...
journal article 2020
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de Wagter, C. (author), Remes, B.D.W. (author), Ruisink, Rick (author), van Tienen, F. (author), van der Horst, E. (author)
Flight endurance is still a bottleneck for many types of unmanned air vehicle (UAV) applications. While battery technology improves over the years, for flights that last an entire day, batteries are still insufficient. Hydrogen-powered fuel cells offer an interesting alternative but pose stringent requirements on the platform. The required...
journal article 2020
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Rattanagraikanakorn, B. (author), Blom, H.A.P. (author), Sharpanskykh, Alexei (author), de Wagter, C. (author), Jiang, C. (author), Schuurman, M.J. (author), Gransden, Derek I. (author), Happee, R. (author)
Evaluating safety risk posed to third parties on the ground due to UAS impact requires a model of probability of fatality (PoF) for human. For quadrotor UAS, the existing impact models predict remarkably different PoFs. The most pessimistic is the impact model adopted by Range Commanders Council (RCC) while the Blunt Criterion model is far...
conference paper 2020
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Rattanagraikanakorn, B. (author), Schuurman, M.J. (author), Gransden, Derek I. (author), Happee, R. (author), de Wagter, C. (author), Sharpanskykh, Alexei (author), Blom, H.A.P. (author)
Recent developments in the concept of UAS operations in urban areas have led to risk concerns of UAS collision with human. To better understand this risk, head and neck injuries due to UAS collisions have been investigated by different research teams using crash dummies. Because of the limitations in biofidelity of a crash dummy, head injury...
journal article 2020
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Li, S. (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)
Autonomous robots heavily rely on well-tuned state estimation filters for successful control. This letter presents a novel automatic tuning strategy for learning filter parameters by minimizing the innovation, i.e., the discrepancy between expected and received signals from all sensors. The optimization process only requires the inputs and...
journal article 2019
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Li, S. (author), de Wagter, C. (author), de Visser, C.C. (author), Chu, Q. P. (author), de Croon, G.C.H.E. (author)
High-speed flight in GPS-denied environments is currently an important frontier in the research on autonomous flight of micro air vehicles. Autonomous drone races stimulate the advances in this area by representing a very challenging case with tight turns, texture-less floors, and dynamic spectators around the track. These properties hamper...
journal article 2019
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Rattanagraikanakorn, B. (author), Gransden, Derek I. (author), Schuurman, M.J. (author), de Wagter, C. (author), Happee, R. (author), Sharpanskykh, Alexei (author), Blom, H.A.P. (author)
Understanding the impact severity of unmanned aircraft system (UAS) collisions with the human body remains a challenge and is essential to the development of safe UAS operations. Complementary to performing experiments of UAS collisions with a crash dummy, a computational impact model is needed in order to capture the large variety of UAS types...
journal article 2019
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Rattanagraikanakorn, B. (author), Schuurman, M.J. (author), Gransden, Derek (author), Happee, R. (author), de Wagter, C. (author), Sharpanskykh, Alexei (author), Blom, H.A.P. (author)
Recent developments in the concept of UAS operations in urban areas have led to risk concerns of UAS collision with human. To better understand this risk, head and neck injuries due to UAS collisions have been investigated by different research teams using crash dummies. Because of the limitations in biofidelity of a crash dummy, head injury...
conference paper 2019
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Karasek, M. (author), Perçin, M. (author), Cunis, Torbjørn (author), van Oudheusden, B.W. (author), de Wagter, C. (author), Remes, B.D.W. (author), de Croon, G.C.H.E. (author)
Flow visualisations are essential to better understand the unsteady aerodynamics of flapping wing flight. The issues inherent to animal experiments, such as poor controllability and unnatural flapping when tethered, can be avoided by using robotic flyers that promise for a more systematic and repeatable methodology. Here, we present a new...
journal article 2019
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de Wagter, C. (author), Meulenbeld, Joost (author)
The DelftaCopter is a tilt-body tailsitter unmanned air vehicle which combines a large swashplate controlled helicopter rotor with a biplane delta-wing. Previous research has shown that the large moment of inertia of the wing and fuselage significantly interacts with the dynamics of the rotor. While this rigid rotor cylinder dynamics model...
journal article 2019
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Wijnker, Dirk (author), van Dijk, Tom (author), Snellen, M. (author), de Croon, G.C.H.E. (author), de Wagter, C. (author)
To investigate how an Unmanned Air Vehicle (UAV) can detect manned aircraft with a single microphone, an audio data set is created in which UAV ego-sound and recorded aircraft sound are mixed together. A convolutional neural network is used to perform the air traffic detection. Due to restrictions on flying UAVs close to aircraft, the data set...
conference paper 2019
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de Wagter, C. (author), Karasek, M. (author), de Croon, G.C.H.E. (author)
journal article 2018
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Karasek, M. (author), Muijres, Florian T. (author), de Wagter, C. (author), Remes, B.D.W. (author), de Croon, G.C.H.E. (author)
Insects are among the most agile natural flyers.Hypotheses on their flight control cannot always be validated by experiments with animals or tethered robots.To this end, we developed a programmable and agile autonomous free-flying robot controlled through bio-inspired motion changes of its flapping wings.Despite being 55 times the size of a...
journal article 2018
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Tijmons, S. (author), de Wagter, C. (author), Remes, B.D.W. (author), de Croon, G.C.H.E. (author)
Autonomous flight of Flapping Wing Micro Air Vehicles (FWMAVs) is a major challenge in the field of robotics, due to their light weight and their flapping-induced body motions. An FWMAV is presented weighing a mere 20 g while all its sensors and processing for autonomous flight are onboard. The navigation is based on a 4-g stereo vision camera...
journal article 2018
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Meulenbeld, Joost (author), de Wagter, C. (author), Remes, B.D.W. (author)
The DelftaCopter, a tilt-body tailsitter UAV, endures large gyroscopic moments due to the single helicopter rotor providing its thrust. In previous research by de Wagter et al.[1] the DelftaCopter’s attitude dynamics were modeled using a rigid rotor, as is customary for small helicopter modeling. A controller based on this model was unable to...
conference paper 2018
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de Wagter, C. (author), Remes, B.D.W. (author), Ruijsink, H.M. (author), van der Horst, E. (author), van Tienen, F. (author), van Wijngaarden, Dennis (author), Meulenbeld, Joost (author), van Hecke, K.G. (author)
Enlarging the flight envelope of aircraft has been a goal since the beginning of aviation. But requirements to fly very fast and to hover are conflicting. During the design of the DelftaCopter, a tail-sitter hybrid UAV with a single large rotor for lift in hover and propulsion in forward flight, the design of the rotor needs to properly balance...
conference paper 2018
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Braber, T.I. (author), de Wagter, C. (author), de Croon, G.C.H.E. (author), Babuska, R. (author)
This article presents an adaptive control strategy to stabilize a micro quadrotor in all three axes using only an Inertial Measurement Unit (IMU) for the attitude control and a monocular camera for canceling position drift. The proposed control scheme automatically determines the appropriate optical flow control gains. This is achieved by...
conference paper 2018
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Rattanagraikanakorn, B. (author), Sharpanskykh, Alexei (author), Schuurman, M.J. (author), Gransden, D.I. (author), Blom, H.A.P. (author), de Wagter, C. (author)
UAS will be integrated into the airspace in the near future, but the risk of UAS collision is not well understood which hampers the development of adequate regulations and standards. As risk has two constituents: frequency and consequence, collision risk analysis of UAS operations in future UTM asks for a quantitative assessment of various...
conference paper 2018
Searched for: author:"de Wagter, C."
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