Blar i NTNU Open på forfatter "Hann, Richard"
-
SIOS’s Earth Observation (EO), Remote Sensing (RS), and operational activities in response to COVID-19
Jawak, Shridhar D.; Andersen, Bo N.; Pohjola, Veijo; Godøy, Øystein; Hübner, Christiane E.; Jennings, Inger; Ignatiuk, Dariusz; Holmen, Kim; Sivertsen, Agnar; Hann, Richard; Tømmervik, Hans; Kääb, Andreas; Błaszczyk, Małgorzata; Salzano, Roberto; Luks, Bartłomiej; Høgda, Kjell Arild; Storvold, Rune; Nilsen, Lennart; Salvatori, Rosamaria; Krishnan, Kottekkatu Padinchati; Chatterjee, Sourav; Lorentzen, Dag Arne; Erlandsson, Rasmus; Lauknes, Tom Rune; Malnes, Eirik; Karlsen, Stein Rune; Enomoto, Hiroyuki; Fjæraa, Ann Mari; Zhang, Jie; Marty, Sabine; Nygård, Knut Ove; Lihavainen, Heikki (Peer reviewed; Journal article, 2021)Svalbard Integrated Arctic Earth Observing System (SIOS) is an international partnership of research institutions studying the environment and climate in and around Svalbard. SIOS is developing an efficient observing system, ... -
Time-Domain System Identification and Validation of Small Fixed-Wing UAV Dynamics
Løw-Hansen, Bogdan; Hann, Richard; Johansen, Tor Arne; Deiler, Christoph (Chapter, 2024) -
UAM Icing: Ice Accretion Experiments and CFD Icing Simulations on Rotors for eVTOL Unmanned Aircraft
Heramarwan, Henidya; Müller, Nicolas Carlo; Hann, Richard; Lutz, Thorsten (Peer reviewed; Journal article, 2023) -
UAV Icing: A Performance Model for a UAV Propeller in Icing Conditions
Müller, Nicolas Carlo; Hann, Richard; Johansen, Tor Arne (Chapter, 2022)In-flight icing on unmanned aerial vehicles is a severe hazard and imposes limits on the operational envelope. Icing has been shown to lead to substantial aerodynamic performance losses on lifting surfaces and propellers. ... -
UAV Icing: A Unified Icing Severity Index Derived from Performance Degradation
Cheung, Michael; Hann, Richard; Johansen, Tor Arne (Chapter, 2022)A problem that unmanned aerial vehicles (UAV) operators face when dealing with in-flight icing conditions is a reliable way to assess icing severity risk. This paper aims to develop an icing severity index that looks at ... -
UAV Icing: Aerodynamic Degradation Caused by Intercycle and Runback Ice Shapes on an RG-15 Airfoil
Wallisch, Joachim; Lindner, Markus Jürgen; Petersen, Øyvind Wiig; Neunaber, Ingrid Johanne; Bracchi, Tania Kalogiannidis; Hearst, Robert Jason; Hann, Richard (Peer reviewed; Journal article, 2024)Electrothermal de-icing systems are a popular approach to protect unmanned aerial vehicles (UAVs) from the performance degradation caused by in-cloud icing. However, their power and energy requirements must be minimized ... -
UAV icing: Development of an ice protection system for the propeller of a small UAV
Müller, Nicolas Carlo; Løw-Hansen, Bogdan; Borup, Kasper Trolle; Hann, Richard (Journal article; Peer reviewed, 2023)Atmospheric icing, also called in-flight icing, is a common hazard for the operation of uncrewed aerial vehicles (UAVs). With the background of a growing commercial and military market of small and medium-sized drones and ... -
UAV Icing: Experimental validation data for predicting ice shapes at low Reynolds numbers
Hann, Richard; Müller, Nicolas Carlo; Wallisch, Joachim; Lindner, Markus Jürgen (Peer reviewed; Journal article, 2023) -
UAV Icing: Ice Accretion Experiments and Validation
Hann, Richard (Journal article; Peer reviewed, 2019)Atmospheric icing is a key challenge to the operational envelope of medium-sized fixed-wing UAVs. Today, several numeric icing codes exist, that all have been developed for general aviation applications. UAVs with wingspans ... -
UAV Icing: Ice Shedding Detection Methods for an Electrothermal De-Icing System
Løw Hansen, Bogdan; Hann, Richard; Johansen, Tor Arne (Chapter, 2022)Among the identified problems with unmanned aerial vehicles (UAVs), especially with the medium-sized fixed-wing UAVs, is a lack of mature ice protection systems (IPSs). One of the emerging UAV ice protection technologies ... -
UAV Icing: Icing Cases for Validation of Path Planning Method
Cheung, Michael; Hann, Richard; Johansen, Tor Arne; Stovner, Bård Nagy (Peer reviewed; Journal article, 2023)As part of the complete solution to deal with atmospheric in-flight icing on unmanned aerial vehicles (UAV), a path planner is a valuable tool for finding an optimal path for accomplishing UAV missions. When considering ... -
UAV Icing: Intercycle Ice Effects on Aerodynamic Performance
Wallisch, Joachim; Hann, Richard (Peer reviewed; Journal article, 2023)Atmospheric in-flight icing poses a challenge to all aircraft including unmanned aerial vehicles (UAVs). Aircraft should avoid icing conditions unless they have ways of mitigating the negative effects of icing, e.g., if ... -
UAV Icing: Numerical Simulation of Icing Effects on Wing and Empennage
Lindner, Markus Jürgen; Wallisch, Joachim; Hann, Richard (Peer reviewed; Journal article, 2023)In-flight icing can result in severe aerodynamic performance penalties for unmanned aerial vehicles. It is therefore important to understand to which extent ice will build up on fixed-wing unmanned aerial vehicles wings ... -
UAV Icing: Validation of an Ice Protection System Design for a Propeller
Hann, Richard; Müller, Nicolas Carlo; Wallisch, Joachim (Chapter, 2024) -
Unsettled Topics in Unmanned Aerial Vehicle Icing
Hann, Richard; Johansen, Tor Arne (Research report, 2020) -
Wind Estimation with Multirotor UAVs
Meier, Kilian; Hann, Richard; Skaloud, Jan; Garreau, Arthur (Peer reviewed; Journal article, 2022)Unmanned Aerial Vehicles (UAVs) have benefited from a tremendous increase in popularity over the past decade, which has inspired their application toward many novel and unique use cases. One of them is the use of UAVs in ...