Browsing NTNU Open by Author "Gryte, Kristoffer"
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Aerodynamic modeling of the Skywalker X8 Fixed-Wing Unmanned Aerial Vehicle
Gryte, Kristoffer; Hann, Richard; Alam, Mushfiqul; Rohac, Jan; Johansen, Tor Arne; Fossen, Thor I. (Chapter, 2018)With advanced control, estimation and simulation requirements in unmanned aerial systems comes the need for sophisticated aerodynamic models. This paper reviews two common means for establishing such models; numerical ... -
Aided Inertial Navigation of Small Unmanned Aerial Vehicles Using an Ultra-Wideband Real Time Localization System
Cisek, Krzysztof; Gryte, Kristoffer; Bryne, Torleiv Håland; Johansen, Tor Arne (Journal article; Peer reviewed, 2018)This paper presents an ultra-wideband (UWB) radio aided inertial navigation system (INS), estimating position, velocity and attitude (PVA), based on a low-cost microelectro-mechanical system (MEMS) Inertial Measurement ... -
Autonomous ballistic airdrop of objects from a small fixed-wing unmanned aerial vehicle
Mathisen, Siri Gulaker; Leira, Frederik Stendahl; Helgesen, Håkon Hagen; Gryte, Kristoffer; Johansen, Tor Arne (Peer reviewed; Journal article, 2020)Autonomous airdrop is a useful basic operation for a fixed-wing unmanned aerial system. Being able to deliver an object to a known target position extends operational range without risking human lives, but is still limited ... -
Autonomous Landing of Fixed-Wing UAV in Net suspended by Multirotor UAVs - A Fixed-Wing Landing System
Nevstad, Sigurd Olav (Master thesis, 2016)This thesis presents an autonomous landing system designed for an fixed-wing unmanned aerial vehicle (UAV) to land in a net suspended by multirotor UAVs. Ordinary landing of an fixed-wing UAV usually involves landing on a ... -
Bluetooth Angle of Departure for indoor industrial environments: Improving Carrier Frequency Offset estimation and exploiting frequency-dependent reflections to reduce measurement error
Rogne, Vemund (Master thesis, 2023)Bluetooth 5.1 introduserte en egenskap kalt 'Direction Finding' som gjør det mulig for two Bluetooth enheter å finne vinkelen mellom hverandre med hjelp av antenne-array. Men Bluetooth spesifikasjonen spesifiserer ikke mer ... -
Control of Fixed-Wing UAVs in Icing Conditions Using Nonlinear Model Predictive Control
Ghindaoanu, Nadine Adelina (Master thesis, 2023)Etterhvert som bruken av små ubemannede luftfartøy (UAV) øker, etterlyses regulatorer som er i stand til å operere under krevende værforhold. I denne oppgaven blir NMPC (nonlinear model predictive control) utforsket, hvor ... -
Control of Permanent Magnet Synchronous Motors for drones
Aasen, Sondre (Master thesis, 2022)Forskningen på ‘fixed wing’ vertikale start- og landingsdroner (VTOL) vokser raskt, med økende fokus på smidige kontrollsystemer og kostnadsreduserende tiltak. Denne oppgaven har som mål å bidra til denne forskningen ved ... -
Control System Architecture for Automatic Recovery of Fixed-Wing Unmanned Aerial Vehicles in a Moving Arrest System
Gryte, Kristoffer; Sollie, Martin Lysvand; Johansen, Tor Arne (Journal article; Peer reviewed, 2021)Automatic recovery is an important step in enabling fully autonomous missions using fixed-wing unmanned aerial vehicles (UAVs) operating from ships or other moving platforms. However, automatic recovery in moving arrest ... -
Elevation Angle Redundancy from Barometric Altitude in Multipath-affected Phased Array Radio Navigation of UAVs
Okuhara, Mika; Bryne, Torleiv Håland; Gryte, Kristoffer; Johansen, Tor Arne (Journal article; Peer reviewed, 2024)Phased Array Radio Systems (PARS) are a promising alternative or backup to Global Navigation Satellite Systems (GNSS) based positioning, offering higher signal-to-noise ratio (SNR), narrow beam communication and robust ... -
Estimation of UAV Position, Velocity and Attitude Using Tightly Coupled Integration of IMU and a Dual GNSS Receiver Setup
Sollie, Martin Lysvand (Master thesis, 2018)Increasing use of UAVs in high-precision applications, such as georeferencing and photogrammetry, increases the requirements on the accuracy of the estimated position, velocity and attitude of the vehicle. Commercial systems ... -
Field Test Results of GNSS-denied Inertial Navigation aided by Phased-array Radio Systems for UAVs
Gryte, Kristoffer; Bryne, Torleiv Håland; Albrektsen, Sigurd Mørkved; Johansen, Tor Arne (Chapter, 2019)Unmanned aerial vehicles (UAVs) often depend on global navigation satellite systems (GNSS) and magnetic compasses for navigation, making them exposed to malicious attacks and sensitive to magnetic anomalies, while restricting ... -
Guidance for a fixed-wing UAV under large environmental forces
Hansen, Henrik Adrian (Master thesis, 2023)Denne masteroppgaven undersøker styrelover for fastvingede ubemannede luftfartøy (UAVer). Forskningen har betydning for bruksområder som flyfotografering, fjernmåling og miljøovervåking, hvor UAVer ofte møter store ytre ... -
High Angle of Attack Landing of an Unmanned Aerial Vehicle
Gryte, Kristoffer (Master thesis, 2015)Motivated by the limited landing space on board a ship, this thesis investigates the landing of the Skywalker X8 fixed wing unmanned aerial vehicle (UAV) in a net. Further motivated by the way birds abruptly, and equally ... -
Hijacking of unmanned surface vehicles: A demonstration of attacks and countermeasures in the field
Solnør, Petter; Volden, Øystein; Gryte, Kristoffer; Petrovic, Slobodan; Fossen, Thor I. (Peer reviewed; Journal article, 2022)Driven by advances in information and communication technologies, an increasing number of industries embrace unmanned and autonomous vehicles for services, such as public transportation, shipping, mapping, and remote ... -
Homogeneous Parametric Modeling of Airloads
Matras, Finn; Reinhardt, Dirk Peter; Gryte, Kristoffer; Pedersen, Morten Dinhoff (Journal article; Peer reviewed, 2023) -
Hyperspectral remote sensing and navigation in coastal environments using UAVs
Hasler, Oliver Kevin (Doctoral theses at NTNU;2024:306, Doctoral thesis, 2024)Imaging spectroscopy, or hyperspectral imaging, is a remote sensing technology that allows a user to gather information about an observed object based on its spectral reflectance. Traditionally, this technology was reserved ... -
Impact of Atmospheric Icing on UAV Aerodynamic Performance
Hann, Richard; Wenz, Andreas Wolfgang; Gryte, Kristoffer; Johansen, Tor Arne (Chapter, 2017)This paper presents a first assessment on the impact of atmospheric icing on the aerodynamic performance of fixed-wing UAVs. Numerical simulations were performed in order to evaluate the impact on lift and drag on a 2D ... -
Inner Loop Adaptive Control of Fixed-Wing Unmanned Aerial Vehicles in Icing Conditions
Högnadóttir, Sif (Master thesis, 2022)Motivert av økende bruk av små ubemannede luftfartøy utforsker denne oppgaven bruken av MRAC (model reference adaptive control), en type adaptiv regulator, og sammenligner det mot konvensjonelle PID-regulatorer. Begge ... -
Integrated Inertial Navigation of UAVs Aided by Phased-Array Radio Measurements
Vågsether, Håkon Solevåg (Master thesis, 2021)Denne masteroppgåva diskuterer utfordringar ved bruk av ubemanna luftfartøy (UAV) i områder med risiko for jamming og andre former for radiofrekvensforstyrringar. Sjølv om fleire nye satellittnavigasjonssystem har entra ... -
LPV model reference control for fixed-wing UAVs
Rotondo, Damiano; Cristofaro, Andrea; Gryte, Kristoffer; Johansen, Tor Arne (Journal article; Peer reviewed, 2017)This paper proposes a linear parameter varying (LPV) model reference-based control for fixed-wing unmanned aerial vehicles (UAVs), which achieves agile and high performance tracking objectives in extended flight envelopes, ...